424B5

424B5 1 d113414d424b5.htm 424B5 424B5

Filed Pursuant to Rule 424(b)(5)
Registration No. 333-271933

The information in this preliminary prospectus supplement is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are part of an effective registration statement filed with the Securities and Exchange Commission. This preliminary prospectus supplement and the accompanying prospectus are not offers to sell nor solicitations of offers to buy these securities in any jurisdiction where such offer or sale is not permitted.

PRELIMINARY PROSPECTUS SUPPLEMENT

SUBJECT TO COMPLETION, DATED MARCH 11, 2026

Prospectus Supplement to Prospectus Dated May 15, 2023

$200,000,000

LOGO

Northern Oil and Gas, Inc.

Common Stock

We are offering $200,000,000 of our shares of our common stock, par value $0.001 per share (our “common stock”). See “Description of Capital Stock” beginning on page 7 of the accompanying prospectus for a more complete description of the shares offered hereby.

Our common stock is listed on the New York Stock Exchange (“NYSE”) under the symbol “NOG.” On March 10, 2026, the last sale price of our common stock as reported on the NYSE was $27.53 per share.

An investment in our common stock involves significant risks. These risks are described under “Risk Factors” beginning on page S-6 of this prospectus supplement and under similar headings in the documents incorporated by reference into this prospectus supplement and the accompanying prospectus.

The underwriter has agreed to purchase the shares of our common stock from us at a price of $ per share, which will result in $ of proceeds to us before expenses. The underwriter may offer the shares of common stock from time to time for sale in one or more transactions on the NYSE, in the over-the-counter market, through negotiated transactions or otherwise at market prices prevailing at the time of sale, at prices related to prevailing market prices or at negotiated prices. For additional information regarding underwriting compensation, see “Underwriting (Conflicts of Interest).”

We have granted the underwriter an option to purchase up to an additional $30,000,000 of our shares of common stock from us at the price set forth above for a period of 30 days following the date of this prospectus supplement.

Neither the Securities and Exchange Commission (“SEC”) nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the accompanying prospectus is or are truthful or complete. Any representation to the contrary is a criminal offense.

The underwriter expects to deliver the common stock to purchasers on or about , 2026.

BofA Securities

The date of this prospectus supplement is , 2026.

TABLE OF CONTENTS


	Page

Prospectus Supplement

ABOUT THIS PROSPECTUS SUPPLEMENT		S-ii
GLOSSARY OF TERMS		S-iii
CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS		S-iv
SUMMARY		S-1
THE OFFERING		S-4
RISK FACTORS		S-6
USE OF PROCEEDS		S-9
DIVIDEND POLICY		S-10
CAPITALIZATION		S-11
CERTAIN MATERIAL U.S. FEDERAL INCOME TAX CONSIDERATIONS		S-13
UNDERWRITING (CONFLICTS OF INTEREST)		S-18
LEGAL MATTERS		S-25
EXPERTS		S-26
WHERE YOU CAN FIND MORE INFORMATION		S-27

Prospectus dated May 15, 2023

About This Prospectus		1
Where You Can Find More Information		2
Cautionary Statement Regarding Forward-Looking Statements		3
Risk Factors		4
The Company		5
Use of Proceeds		6
Description of Capital Stock		7
Description of Depositary Shares		11
Description of Warrants		12
Description of Purchase Contracts		14
Description of Units		15
Plan of Distribution		17
Legal Matters		21
Experts		21

You should rely only on the information contained or incorporated by reference in this prospectus supplement, the accompanying prospectus or any free writing prospectus that we may provide to you. We have not, and the underwriter has not, authorized anyone to provide you with different information, and you should not rely on any information not contained in or incorporated by reference into this prospectus supplement, the accompanying prospectus or any free writing prospectus that we may provide you. This prospectus supplement does not constitute an offer to sell or a solicitation of an offer to buy any securities other than our common stock. We are not, and the underwriter is not, offering to sell shares of our common stock or seeking offers to buy shares of our common stock in any jurisdictions where offers and sales are not permitted. The information contained in this prospectus supplement, the accompanying prospectus or any free writing prospectus that we may provide to you is accurate only as of the date of each document regardless of the time of delivery of this prospectus supplement and the accompanying prospectus or any sale of shares of our common stock. In case there are any differences or inconsistencies between this prospectus supplement, the accompanying prospectus or any free writing prospectus that we may provide to you and the information incorporated by reference in them, you should rely on the information in the document with the most recent date.

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ABOUT THIS PROSPECTUS SUPPLEMENT

Unless the context indicates otherwise, references in this prospectus supplement to “we,” “us,” “our” and the “Company” refer to Northern Oil and Gas, Inc.

This document is in two parts. The first part is this prospectus supplement, which contains specific information about the terms on which we are offering and selling our common stock and important business information about us, and also adds to and updates information contained in the accompanying prospectus dated May 15, 2023, which forms a part of a registration statement on Form S-3 (File No. 333-271933), and the documents incorporated by reference in this prospectus supplement and the accompanying prospectus. The second part is the accompanying prospectus, which, among other things, gives more general information, some of which may not apply to this offering, and which contains and incorporates by reference important business and financial information about us and other information about this offering. This prospectus supplement and the accompanying prospectus are part of a registration statement on Form S-3 that we filed with the SEC using a “shelf” registration process.

This prospectus supplement and the accompanying prospectus do not contain all of the information included in the registration statement, as permitted by the rules and regulations of the SEC. For further information, we refer you to our registration statement on Form S-3, including its exhibits, of which this prospectus supplement and the accompanying prospectus form a part. We are subject to the informational requirements of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and therefore file reports and other information with the SEC. Statements contained in this prospectus supplement and the accompanying prospectus about the provisions or contents of any agreement or other document are only summaries. If SEC rules require that any agreement or document be filed as an exhibit to the registration statement, you should refer to that agreement or document for its complete contents.

You should read both this prospectus supplement and the accompanying prospectus as well as additional information incorporated by reference herein and described under “Where You Can Find More Information” beginning on page S-27 of this prospectus supplement before investing in our common stock.

If the description of this offering varies between this prospectus supplement and the accompanying prospectus, you should rely on the information in this prospectus supplement. Any statement made in this prospectus supplement or in a document incorporated or deemed to be incorporated by reference in this prospectus supplement will be deemed to be modified or superseded for purposes of this prospectus supplement to the extent that a statement contained in this prospectus supplement or in any other subsequently filed document that is also incorporated or deemed to be incorporated by reference in this prospectus supplement modifies or supersedes that statement. Any statement so modified or superseded will not be deemed, except as so modified or superseded, to constitute a part of this prospectus supplement.

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GLOSSARY OF TERMS

Unless otherwise indicated in this prospectus supplement, natural gas volumes are stated at the legal pressure base of the state or geographic area in which the reserves are located at 60 degrees Fahrenheit. Crude oil and natural gas equivalents are determined using the ratio of six Mcf of natural gas to one barrel of crude oil, condensate or natural gas liquids.

The following definitions shall apply to the technical terms used in this prospectus supplement.

Terms used to describe quantities of crude oil and natural gas:

“Mcf.” One thousand cubic feet of natural gas.

“NGLs.” Natural gas liquids. Hydrocarbons found in natural gas that may be extracted as liquefied petroleum gas and natural gasoline.

Terms used to describe our interests in wells and acreage:

“Basin.” A large natural depression on the earth’s surface in which sediments generally brought by water accumulate.

“Completion.” The process of treating a drilled well followed by the installation of permanent equipment for the production of crude oil, NGLs, and/or natural gas.

“Reserves.” Estimated remaining quantities of oil and gas and related substances anticipated to be economically producible, as of a given date, by application of development projects to known accumulations. In addition, there must exist, or there must be a reasonable expectation that there will exist, the legal right to produce or a revenue interest in the production, installed means of delivering oil and gas or related substances to market, and all permits and financing required to implement the project.

“Working interest.” The right granted to the lessee of a property to explore for and to produce and own crude oil, NGLs, natural gas or other minerals. The working interest owners bear the exploration, development, and operating costs on either a cash, penalty, or carried basis.

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

We are including the following discussion to inform our existing and potential security holders generally of some of the risks and uncertainties that can affect the Company and to take advantage of the “safe harbor” protection for forward-looking statements that applicable federal securities law affords.

The information contained in, or incorporated by reference into, this prospectus supplement and the accompanying prospectus include “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Exchange Act. All statements other than statements of historical facts included in this prospectus supplement and the accompanying prospectus, including the documents incorporated by reference herein or therein, regarding our financial position, business strategy, plans and objectives of management for future operations, industry conditions, indebtedness covenant compliance, capital expenditures, production, cash flow, borrowing base under our Revolving Credit Facility (as defined herein), our intention or ability to pay or increase dividends on our capital stock, and impairment are forward-looking statements. When used in this prospectus supplement, forward-looking statements are generally accompanied by terms or phrases such as “estimate,” “project,” “predict,” “believe,” “expect,” “continue,” “anticipate,” “target,” “could,” “plan,” “intend,” “seek,” “goal,” “will,” “should,” “may” or other words and similar expressions that convey the uncertainty of future events or outcomes. Items contemplating or making assumptions about actual or potential future production, sales, market size, collaborations, cash flows, and trends or operating results also constitute such forward-looking statements.

Forward-looking statements involve inherent risks and uncertainties, and important factors (many of which are beyond the Company’s control) that could cause actual results to differ materially from those set forth in the forward-looking statements, including the following: changes in crude oil and natural gas prices; the pace of drilling and completions activity on the Company’s current properties and properties pending acquisition; infrastructure constraints and related factors affecting the Company’s properties; general economic or industry conditions, whether internationally, nationally and/or in the communities in which the Company conducts business, including any future economic downturn, cost inflation, supply chain disruptions, the impact of continued or further inflation, disruption in the financial markets, changes in the interest rate environment and actions taken by OPEC and other oil producing countries as it pertains to the global supply and demand of, and prices for, crude oil, natural gas and NGLs; ongoing legal disputes over, and potential shutdown of, the Dakota Access Pipeline; the Company’s ability to identify and consummate additional development opportunities and potential or pending acquisition transactions, the projected capital efficiency savings and other operating efficiencies and synergies resulting from the Company’s acquisition transactions, integration and benefits of property acquisitions, or the effects of such acquisitions on the Company’s cash position and levels of indebtedness; changes in the Company’s reserves estimates or the value thereof; disruption to the Company’s business due to acquisitions and other significant transactions; changes in local, state, and federal laws, regulations or policies that may affect the Company’s business or the Company’s industry (such as the effects of tax law changes, and changes in environmental, health, and safety regulation and regulations addressing climate change, and trade policy and tariffs); conditions of the securities markets; risks associated with the Company’s 3.625% convertible senior notes due 2029 (the “Convertible Notes”), including the potential impact that the Convertible Notes may have on the Company’s financial position and liquidity, potential dilution, and that provisions of the Convertible Notes could delay or prevent a beneficial takeover of the Company; the potential impact of the capped call transactions undertaken in tandem with the Convertible Notes issuances, including counterparty risk; increasing attention to environmental, social and governance matters; the Company’s ability to raise or access capital on acceptable terms; cyber-incidents could have a material adverse effect on the Company’s business, financial condition or results of operations; changes in accounting principles, policies or guidelines; events beyond the Company’s control, including a global or domestic health crisis, acts of terrorism, political or economic instability or armed conflict in oil and gas producing regions and shipping channels, including the joint U.S.-Israel strikes on Iran, continued instability in the Middle East and the effects of any changes to conditions in or impacting Venezuela; and other economic, competitive, governmental, regulatory and technical factors affecting the Company’s operations, products and prices.

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We have based any forward-looking statements on our current expectations and assumptions about future events. While our management considers these expectations and assumptions to be reasonable, they are inherently subject to significant business, economic, competitive, regulatory and other risks, contingencies and uncertainties, most of which are difficult to predict and many of which are beyond our control. Accordingly, results actually achieved may differ materially from expected results described in these statements. Forward-looking statements speak only as of the date they are made. You should consider carefully the statements in the section entitled “Item 1A. Risk Factors” and other sections of our Annual Report on Form 10-K for the fiscal year ended December 31, 2025, as updated by subsequent reports we file with the SEC, which describe factors that could cause our actual results to differ from those set forth in the forward-looking statements. The Company does not undertake, and specifically disclaims, any obligation to update any forward-looking statements to reflect events or circumstances occurring after the date of such statements, except as may be required by applicable law or regulation.

Readers are urged not to place undue reliance on these forward-looking statements, which speak only as of the date of this prospectus supplement. Readers are urged to carefully review and consider the various disclosures made by us in our reports filed with the SEC which attempt to advise interested parties of the risks and factors that may affect our business, financial condition, results of operation and cash flows. If one or more of these risks or uncertainties materialize, or if the underlying assumptions prove incorrect, our actual results may vary materially from those expected or projected. All forward-looking statements, expressed or implied, included in this prospectus supplement, the accompanying prospectus and the information incorporated herein and therein are expressly qualified in their entirety by this cautionary statement.

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SUMMARY

This summary highlights selected information about us but does not contain all the information that may be important to you. This prospectus supplement and the accompanying prospectus include specific terms of the offering and information about our business and financial data. You should carefully read this entire prospectus supplement and the accompanying prospectus, including the matters set forth under the caption “Risk Factors,” beginning on page S-6 of this prospectus supplement and the information incorporated by reference in this prospectus supplement and the accompanying prospectus before making an investment decision.

OUR COMPANY

We are an independent energy company engaged as a non-operator in the acquisition, exploration, development and production of oil and natural gas properties in the United States, primarily in the Williston Basin, the Permian Basin, the Appalachian Basin and the Uinta Basin. We believe the location, size and concentration of our acreage positions in some of North America’s leading unconventional oil and gas resource plays provide us with drilling and development opportunities that will result in significant long-term value.

Our primary strategy is to invest in non-operated minority working and mineral interests in oil and natural gas properties, with a core area of focus in the premier basins within the United States. As a non-operator, we are able to diversify our investment exposure by participating in a large number of gross wells, as well as entering into additional project areas by partnering with numerous experienced operating partners or pursuing value enhancing acquisitions. In addition, because we can generally elect to participate on a well-by-well basis, we believe we have increased flexibility in the timing and amount of our capital expenditures because we are not burdened with various contractual arrangements with respect to minimum drilling obligations. Further, we are able to avoid exploratory and infrastructure costs incurred by many oil and natural gas producers.

We seek to create value through strategic acquisitions and financially participating alongside operators who have significant experience in developing and producing hydrocarbons in our core areas. We have more than 100 experienced operating partners that provide technical insights and opportunities for acquisitions. Across these operators, no single operator represented more than 11% of our fourth quarter 2025 oil and natural gas sales.

Our production mix by basin for the three months ended December 31, 2025 was 68% oil and 32% natural gas in the Williston Basin, 62% oil and 38% natural gas in the Permian Basin, 3% oil and 97% natural gas in the Appalachian Basin, and 91% oil and 9% natural gas in the Uinta Basin. For the three months ended December 31, 2025, our capital expenditures were split proportionately among the Williston Basin, the Permian Basin, the Appalachian Basin and the Uinta Basin at 26%, 44%, 22% and 8%, respectively.

RECENT DEVELOPMENTS

Antero Acquisitions

On February 23, 2026, we and Infinity Natural Resources, LLC (“INR Holdings”) completed previously announced acquisitions (the “Antero Acquisitions”) of (i) certain rights, title and interests in upstream oil and gas properties, rights and related assets located in the State of Ohio (the “Upstream Assets”) from Antero Resources Corporation, Antero Minerals LLC and Monroe Pipeline LLC (collectively, the “Upstream Sellers”), pursuant to that certain purchase and sale agreement (as amended, the “Upstream Purchase Agreement”), dated December 5, 2025, by and among INR Holdings, the Company and the Upstream Sellers, for a combined cash purchase price of approximately $800 million, and (ii) certain gathering, compression and transportation systems, water facilities and systems, equipment and related assets located in the counties of Belmont, Guernsey, Monroe, Noble

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and Washington, Ohio (the “Midstream Assets” and, together with the Upstream Assets, the “Acquired Assets”) from Antero Midstream LLC, Antero Water LLC and Antero Treatment LLC (collectively, the “Midstream Sellers” and, together with the Upstream Sellers, the “Sellers”) pursuant to that certain purchase and sale agreement (as amended, the “Midstream Purchase Agreement” and, together with the Upstream Purchase Agreement, the “Antero Purchase Agreements”), dated December 5, 2025, by and among INR Holdings, the Company and the Midstream Sellers, for a combined cash purchase price of approximately $400 million. The Antero Acquisitions were effective as of July 1, 2025.

Pursuant to the Antero Purchase Agreements, we acquired an undivided 40% working interest in the Upstream Assets and an undivided 40% working interest in the Midstream Assets, and INR Holdings acquired an undivided 60% working interest in the Upstream Assets and an undivided 60% working interest in the Midstream Assets, with INR Holdings serving as operator of the Acquired Assets. The total consideration paid to the Sellers at closing, net of customary purchase price adjustments, and net to the Company, was $464.6 million in cash, which we funded using borrowings under our Revolving Credit Facility. A portion of the purchase price was funded by a $58.8 million acquisition deposit paid in December 2025.

Credit Agreement Amendment

On February 23, 2026, we entered into an amendment to our Fourth Amended and Restated Credit Agreement, dated as of November 5, 2025, governing our revolving credit facility (our “Revolving Credit Facility”), pursuant to which (i) the borrowing base under our Revolving Credit Facility was increased from $1.8 billion to $1.975 billion and (ii) the elected commitment amount under our Revolving Credit Facility was increased from $1.6 billion to $1.8 billion.

2028 Notes Redemption

On March 4, 2026 (the “2028 Notes Redemption Date”), we redeemed the remaining approximately $20.2 million in outstanding aggregate principal amount of our 8.125% Senior Notes due 2028 at a redemption price of 100.000% of the principal amount thereof, plus accrued and unpaid interest to, but excluding, the 2028 Notes Redemption Date (the “2028 Notes Redemption”). The 2028 Notes Redemption was funded with borrowings under our Revolving Credit Facility.

Dividends

In November 2025, our board of directors (our “Board”) declared a cash dividend on our common stock in the amount of $0.45 per share. The dividend was paid on January 30, 2026 to stockholders of record as of the close of business on December 30, 2025.

In February 2026, our Board declared a cash dividend on our common stock in the amount of $0.45 per share. The dividend is payable on April 30, 2026 to stockholders of record as of the close of business on March 30, 2026.

ONGOING ACQUISITION AND INVESTMENT ACTIVITIES

We regularly evaluate additional acquisition opportunities and frequently engage in discussions with potential sellers. We are currently focused on pursuing acquisition opportunities that will further diversify our holdings outside of the Williston Basin and in particular opportunities in the Permian Basin, Appalachian Basin, Uinta Basin or other premier basins within the United States. The timeline required to negotiate and close on any one or more acquisition opportunities is at times unpredictable and can vary greatly.

Our acquisitions may require material investments and could result in significant modifications to our previously announced capital plans, both in the aggregate amount of capital expenditures to be made and a

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reallocation of capital. Our acquisitions are typically made for a cash purchase price which historically we have funded with a combination of some or all of revolving credit facility borrowings, cash generated from operations and debt and/or equity issuances.

We typically do not announce a transaction until after we have executed a definitive agreement. In certain cases, in order to protect our business interests or for other reasons, we may defer public announcement of a transaction until closing or a later date. Past experience has demonstrated that discussions and negotiations regarding a potential transaction can advance or terminate in a short period of time. Moreover, the closing of any transaction for which we have entered into a definitive agreement may be subject to customary and other closing conditions, which may not ultimately be satisfied or waived. Accordingly, we can give no assurance that our current or future acquisition or investment efforts will be successful.

OUR PRINCIPAL EXECUTIVE OFFICES

Northern Oil and Gas, Inc. is a Delaware corporation. Our corporate offices are located at 4350 Baker Road, Suite 400, Minnetonka, MN 55343. Our phone number is (952) 476-9800. Our website address is www.noginc.com. Our periodic reports and other information filed with or furnished to the SEC are available, free of charge, through our website, as soon as reasonably practicable after those reports and other information are electronically filed with or furnished to the SEC. Information on our website is not incorporated by reference into this prospectus supplement and does not constitute a part of this prospectus supplement.

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THE OFFERING

The summary below describes the principal terms of this offering. Certain of the terms and conditions described below are subject to important limitations and exceptions.

Issuer

Northern Oil and Gas, Inc.

Shares of Common Stock Offered by Us

$200,000,000 of our shares, or $230,000,000 of our shares if the underwriter exercises in full its option to purchase additional shares of common stock.

Option to Purchase Additional Shares

We have granted the underwriter an option to purchase up to an additional $30,000,000 of our shares of our common stock within 30 days of the date of this prospectus supplement.

Common Stock Outstanding After the Offering

shares, or shares if the underwriter exercises in full its option to purchase additional shares of common stock.

Use of Proceeds

We estimate that, after deducting underwriting discounts and commissions and estimated offering expenses payable by us, we will receive approximately $ million of net proceeds from this offering, or $ million if the underwriter exercises in full its option to purchase additional shares. We intend to use the net proceeds of this offering for general corporate purposes, which will include the repayment of a portion of the outstanding borrowings under our Revolving Credit Facility.

An affiliate of the underwriter is a lender under our Revolving Credit Facility and, therefore, may receive a portion of the net proceeds of this offering through any repayment of borrowings under our Revolving Credit Facility. See “Underwriting (Conflicts of Interest).”

Conflicts of Interest

Because an affiliate of the underwriter is a lender under our Revolving Credit Facility and will receive 5% or more of the net proceeds of this offering due to the repayment of borrowings under our Revolving Credit Facility, the underwriter is deemed to have a “conflict of interest” under Rule 5121 of the Financial Industry Regulatory Authority, Inc. (“FINRA Rule 5121”). Accordingly, this offering is being made in compliance with the requirements of FINRA Rule 5121. Pursuant to that rule, the appointment of a “qualified independent underwriter” is not required in connection with the offering as a “bona fide public market,” as defined in FINRA Rule 5121, exists for our common stock. The underwriter will not confirm any sales to any account over which it exercises discretionary authority without the specific written approval of the account holder. See “Use of Proceeds” and “Underwriting (Conflicts of Interest).”

Dividend Policy

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paid incrementally higher quarterly cash dividends through the $0.45 per share cash dividend declared in January 2025 and paid on April 30, 2025 to stockholders of record as of the close of business on March 28, 2025. Most recently, in February 2026, our Board declared a cash dividend on our common stock in the amount of $0.45 per share, payable on April 30, 2026 to stockholders of record as of the close of business on March 30, 2026. We have announced our intention to set our dividend policy once per year, with the potential for interim modifications driven by material changes in realized commodity prices, significant corporate actions or other events, and currently anticipate maintaining a $0.45 per share quarterly dividend throughout 2026.

We cannot assure you, however, that we will pay dividends in the future in these amounts or at all. Our Board may change the timing and amount of any future dividend payments or eliminate the payment of future dividends to our common stockholders at its discretion, without notice to our stockholders. Any future determination relating to our dividend policy will be made at the sole discretion of our Board and will depend on a number of factors, including general and economic conditions, industry standards, our financial condition and operating results, our available cash and current and anticipated cash needs, restrictions under the documentation governing certain of our indebtedness, restrictions under Delaware law, and such other factors as our Board may deem relevant. See “Dividend Policy.”

NYSE Symbol

NOG

Risk Factors

An investment in our securities involves a high degree of risk. Before making an investment decision, investors should carefully consider the information set forth in the section of this prospectus supplement entitled “Risk Factors” beginning on page S-6, as well as the other risks and uncertainties described in the documents that we file with the SEC that are incorporated herein by reference.

Transfer Agent

Equiniti Trust Company

Unless otherwise indicated, in this prospectus supplement, the number of shares of common stock to be outstanding after this offering is based on 97,265,559 shares issued and outstanding as of December 31, 2025. This number:

•

assumes no exercise by the underwriter of its option to purchase additional shares of common stock;

•

excludes 700,852 shares of common stock reserved for issuance as of December 31, 2025, in connection with future awards available for grant under the Northern Oil and Gas, Inc. Amended and Restated 2018 Equity Incentive Plan (the “2018 Plan”); and

•

excludes 23,653,010 shares of common stock reserved for issuance upon conversion of the Convertible Notes.

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RISK FACTORS

An investment in our securities involves a high degree of risk. Before deciding whether to invest in our securities, you should consider carefully all the information we have included or incorporated by reference in this prospectus supplement and the accompanying prospectus, including the information under the caption “Item 1A. Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2025 and other SEC filings filed after such Annual Report. In addition, you should carefully consider the risk factors described below related to this offering and an investment in our securities. If any of these risks actually occurs, our business, financial condition, results of operations and cash flow could be seriously harmed. This could cause the trading price of our common stock offered hereby to decline, resulting in a loss of all or part of your investment.

Risks Related to this Offering and Ownership of Our Common Stock

The trading price of our common stock has been, and is likely to continue to be, volatile and could be subject to wide fluctuations in response to various factors, some of which are beyond our control.

The market price of our common stock has historically varied greatly. The market price of our common stock is likely to continue to be volatile because of numerous factors, including:

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changes in crude oil and natural gas prices;

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continuing or worsening inflationary issues and associated changes in monetary policy;

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a domestic or global economic slowdown that could affect our financial results and operations and the economic strength of our customers;

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disagreements or price wars amongst OPEC+ members, including the effect thereof on global oil supply, oil storage capacity and oil prices;

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our ability to meet our working capital needs;

•

quarterly variations in operating results;

•

changes in financial estimates by us or securities analysts who may cover our stock or by our failure to meet the estimates made by securities analysts;

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changes in market valuations of other similar companies;

•

announcements by us or our competitors of new products or of significant technical innovations, contracts, acquisitions, divestitures, strategic relationships or joint ventures;

•

changes in laws or regulations applicable to our business;

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additions or departures of key personnel;

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changes in our capital structure, such as future issuances of debt or equity securities;

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short sales, hedging and other derivative transactions involving our capital stock;

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transactions in our common stock by directors, officers, affiliates and other major investors; and

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the other risk factors described herein or incorporated by reference from our Annual Report on Form 10-K for the year ended December 31, 2025 or any subsequent reports we file with the SEC.

Furthermore, from time to time, the stock markets have experienced extreme price and volume fluctuations that have affected and continue to affect the market prices of equity securities of many companies. These fluctuations often have been unrelated or disproportionate to the operating performance of those companies. These broad market and industry fluctuations, as well as general economic, geopolitical and market conditions, such as recessions, trade wars, interest rate changes, international currency fluctuations or political unrest, may negatively impact the market price of our common stock. In the past, companies that have experienced volatility

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in the market price of their stock have been subject to securities class action litigation, and we have been a defendant to a securities class action claim in the past. Any future securities litigation against us could result in substantial costs and divert our management’s attention and resources, and harm our business, financial condition, and results of operations.

Our ability to pay dividends to our stockholders is restricted by applicable laws and regulations and requirements under certain of our debt agreements, including our Revolving Credit Facility and the indentures governing our senior notes.

Holders of our common stock are only entitled to receive such cash dividends as our Board, in its sole discretion, may declare out of funds legally available for such payments. We have paid quarterly dividends since 2021. We cannot assure you, however, that we will pay dividends in the future in the current amounts or at all. Our Board may change the timing and amount of any future dividend payments or eliminate the payment of future dividends to our common stockholders at its discretion, without notice to our stockholders. Any future determination relating to our dividend policy will be dependent on a variety of factors, including our financial condition, earnings, legal requirements, our general liquidity needs, and other factors that our Board deems relevant. Our ability to declare and pay dividends to our stockholders is subject to certain laws, regulations, and policies, including minimum capital requirements and, as a Delaware corporation, we are subject to certain restrictions on dividends under the Delaware General Corporation Law (the “DGCL”). Under the DGCL, our Board may not authorize payment of a dividend unless it is either paid out of our surplus, as calculated in accordance with the DGCL, or if we do not have a surplus, it is paid out of our net profits for the fiscal year in which the dividend is declared and/or the preceding fiscal year. Finally, our ability to pay dividends to our stockholders may be limited by covenants in any debt agreements that we are currently a party to, including our Revolving Credit Facility and the indentures governing our senior notes, or may enter into in the future. As a consequence of these various limitations and restrictions, we may not be able to make, or may have to reduce or eliminate at any time, the payment of dividends on our common stock. If as a result, we are unable to pay dividends, investors may be forced to rely on sales of their common stock after price appreciation, which may never occur, as the only way to realize a return on their investment. Any change in the level of our dividends or the suspension of the payment thereof could have a material adverse effect on the market price of our common stock. See “Dividend Policy.”

The availability of shares for sale or other issuance in the future could reduce the market price of our common stock.

Our Board has the authority, without action or vote of our stockholders, to issue all or any part of our authorized but unissued shares of common stock, or issue shares of preferred stock, which may be convertible into shares of common stock. In the future, we may issue securities to raise cash for acquisitions, as consideration in acquisitions, to pay down debt, to fund capital expenditures or general corporate expenses, in connection with the exercise of stock options or to satisfy our obligations under our incentive plans. We may also acquire interests in other companies by using a combination of cash, our preferred stock and our common stock or just our common stock. We may also issue securities, including our preferred stock, that are convertible into, exchangeable for, or that represent the right to receive, our common stock. The occurrence of any of these events or any issuance of common stock upon conversion of our Convertible Notes may dilute your ownership interest in the Company, reduce our earnings per share and have an adverse impact on the price of our common stock.

We may issue preferred stock whose terms could adversely affect the voting power or value of our common stock.

Our governing documents authorize us to issue, without the approval of our stockholders, one or more classes or series of preferred stock having such designations, preferences, limitations and relative rights, including preferences over our common stock respecting dividends and distributions, as our Board may determine. The terms of one or more classes or series of preferred stock could adversely impact the voting power

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or value of our common stock. For example, we might grant holders of preferred stock the right to elect some number of our directors in all events or on the happening of specified events or the right to veto specified transactions. Similarly, the repurchase or redemption rights or liquidation preferences we might assign to holders of preferred stock could affect the residual value of our common stock.

The terms of any future preferred equity or debt financing may give holders of any preferred securities or debt securities rights that are senior to the rights of our common stockholders or impose more stringent restrictions on our operations.

If we incur additional debt or raise equity through the issuance of preferred stock, the terms of the debt or the preferred stock issued may give the holders rights, preferences and privileges senior to those of holders of our common stock, particularly in the event of liquidation. The terms of the debt may also impose additional and more stringent restrictions on our operations. If we raise funds through the issuance of additional equity, the ownership percentage of our existing stockholders would be diluted.

There may be future sales or issuances of our common stock, including issuances in connection with our incentive plans, acquisitions or otherwise, which will dilute the ownership interests of stockholders and may adversely affect the market price of our common stock.

Our certificate of incorporation authorizes us to issue 270,000,000 shares of common stock, of which 97,265,559 shares were issued and outstanding as of December 31, 2025. Any shares of common stock that we may issue in the future, including securities that are convertible into or exchangeable for, or that represent the right to receive, common stock or substantially similar securities, may dilute the ownership interests of our stockholders. In addition, future issuances of common stock under the 2018 Plan or other equity incentive plans that we may adopt in the future, or in connection with an acquisition or otherwise, would also dilute the percentage ownership held by the investors who purchase shares of common stock in this offering. The market price of our common stock could decline as a result of sales or issuances of a large number of shares of our common stock or similar securities in the market after this offering or the perception that such sales or issuances could occur.

If securities or industry analysts publish negative reports about our business, our share price and trading volume could decline.

The market price for our common stock depends in part on the research and reports that securities or industry analysts publish about us or our business, our market and our competitors. We do not have any control over these analysts. If one or more of the analysts who cover us downgrade our shares or change their opinion of our shares, our share price would likely decline. If one or more of these analysts cease coverage of the Company or fail to regularly publish reports on us, we could lose visibility in the financial markets, which could cause our share price or trading volume to decline.

Our ability to use net operating loss carryforwards to offset future taxable income may be subject to certain limitations.

We have net operating loss (“NOL”) carryforwards that we may use to offset against taxable income for U.S. federal income tax purposes. As of December 31, 2025, we had an estimated NOL carryforward of approximately $532.8 million for U.S. federal income tax purposes. In general, under Section 382 of the Code (as defined below), a corporation that undergoes an “ownership change” can be subject to limitations on the use of its NOLs to offset future taxable income. We underwent an “ownership change” during 2018 and, as a result, the use of $121.7 million of our remaining NOL carryforwards is subject to limitations under Section 382 of the Code. This limitation is generally determined by multiplying the value of our outstanding stock at the time of the “ownership change” by the applicable long-term tax-exempt rate as defined in Section 382 of the Code. Future changes in our stock ownership, some of which are outside of our control, could result in an additional “ownership change” under Section 382 of the Code, which could impose further limitations on any NOL carryforwards we have.

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USE OF PROCEEDS

We estimate that the net proceeds to us from this offering, after deducting the underwriting discounts and commissions and estimated offering expenses payable by us, will be approximately $ million (or $ million if the underwriter exercises in full its option to purchase additional shares of common stock). We intend to use the proceeds of this offering for general corporate purposes, which will include the repayment of a portion of the outstanding borrowings under our Revolving Credit Facility.

As of March 6, 2026, we had outstanding borrowings of $958.0 million under our Revolving Credit Facility. The weighted average interest rate of our Revolving Credit Facility was 5.69% as of March 6, 2026. Our Revolving Credit Facility is scheduled to mature on November 5, 2030. The borrowings under our Revolving Credit Facility had been incurred to fund a portion of the purchase price for the Antero Acquisitions, the 2028 Notes Redemption and for general corporate purposes. See “Summary—Recent Developments.”

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DIVIDEND POLICY

On May 6, 2021, our Board declared our first cash dividend on our common stock in the amount of $0.03 per share. The dividend was paid on July 30, 2021 to stockholders of record as of the close of business on June 30, 2021. Subsequently, our Board declared and paid incrementally higher quarterly cash dividends through the $0.45 per share cash dividend declared in January 2025 and paid on April 30, 2025 to stockholders of record as of the close of business on March 28, 2025. Most recently, in February 2026, our Board declared a cash dividend on our common stock in the amount of $0.45 per share, payable on April 30, 2026 to stockholders of record as of the close of business on March 30, 2026. We have announced our intention to set our dividend policy once per year, with the potential for interim modifications driven by material changes in realized commodity prices, significant corporate actions or other events, and currently anticipate maintaining a $0.45 per share quarterly dividend throughout 2026. We cannot assure you, however, that we will pay dividends in the future in these amounts or at all. Our Board may change the timing and amount of any future dividend payments or eliminate the payment of future dividends to our common stockholders at its discretion, without notice to our stockholders. Any future determination relating to our dividend policy will be made at the sole discretion of our Board and will depend on a number of factors, including general and economic conditions, industry standards, our financial condition and operating results, our available cash and current and anticipated cash needs, restrictions under the documentation governing certain of our indebtedness, including our Revolving Credit Facility and our senior notes, capital requirements, regulations, contractual, legal, tax and regulatory restrictions and implications on the payment of dividends by us to our stockholders, and such other factors as our Board may deem relevant.

The ability of our Board to declare a dividend is also subject to limits imposed by the DGCL. Under the DGCL, our Board may declare dividends only to the extent of our “surplus,” which is defined as total assets at fair market value minus total liabilities, minus statutory capital, or if there is no surplus, out of net profits for the fiscal year in which the dividend is declared and/or the preceding fiscal year. See “Risk Factors—Risks Related to this Offering and Ownership of Our Common Stock—Our ability to pay dividends to our stockholders is restricted by applicable laws and regulations and requirements under certain of our securities and debt agreements, including our Revolving Credit Facility and the indentures governing our senior notes.”

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CAPITALIZATION

The following table sets forth our cash and cash equivalents and our capitalization as of December 31, 2025:

•

on an actual basis;

•

on an as adjusted basis, after giving effect to (i) the 2028 Notes Redemption and (ii) the draw downs on our Revolving Credit Facility and the use of such borrowings to fund the closing cash consideration for the Antero Acquisitions and the 2028 Notes Redemption; and

•

on an as further adjusted basis, after giving effect to this offering (assuming no exercise of the underwriter’s option to purchase additional shares of common stock) and the application of the net proceeds therefrom (assuming all of such net proceeds are used to repay a portion of the outstanding borrowings under our Revolving Credit Facility), after deducting underwriting discounts and commissions and estimated offering expenses.

This table should be read in conjunction with the “Management’s Discussion and Analysis of Financial Condition and Results of Operations” section and the condensed financial statements and notes thereto included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2025, which is incorporated by reference in this prospectus supplement and the accompanying prospectus, as well as the “Summary—Recent Developments” and “Use of Proceeds” sections in this prospectus supplement.


	As of December 31, 2025
	Actual			As Adjusted			As Further Adjusted
	($ in thousands)
Cash and Cash Equivalents⁽¹⁾	$	14,299		$	14,299		$	14,299

Long-Term Debt:
Revolving Credit Facility⁽¹⁾	$	478,000		$	904,698		$
8.125% Senior Notes due 2028		20,165			—			—
3.625% Convertible Senior Notes due 2029		700,000			700,000			700,000
8.750% Senior Notes due 2031		500,000			500,000			500,000
7.875% Senior Notes due 2033		725,000			725,000			725,000
Unamortized debt discounts and premiums		4,915			4,791			4,791
Unamortized debt issuance costs		(32,687	)		(32,549	)		(32,549	)

Total Long-Term Debt	$	2,395,393		$	2,801,940		$

Stockholders’ Equity:
Common Stock, Par Value $0.001⁽²⁾		499			499
Preferred Stock, Par Value $0.001⁽³⁾		—			—			—
Additional Paid In Capital		1,644,563			1,644,563

Retained Earnings		481,279			481,279

Total Stockholders’ Equity		2,126,341			2,126,341

Total Capitalization	$	4,521,734		$	4,928,281		$

(1)

As of March 6, 2026, we had cash and cash equivalents of approximately $30.0 million and total borrowings of $958.0 million outstanding under our Revolving Credit Facility. We expect to use the net proceeds of this offering for general corporate purposes, which will include the repayment of a portion of the outstanding borrowings under our Revolving Credit Facility.

(2)	The number of shares of common stock is based on 270,000,000 shares authorized and 97,265,559 shares issued and outstanding as of December 31, 2025. The share information in the table:

•

assumes no exercise by the underwriter of its option to purchase additional shares of common stock;

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•

excludes 700,852 shares of common stock reserved for issuance as of December 31, 2025, in connection with future awards available for grant under the 2018 Plan; and

•

excludes 23,653,010 shares of common stock reserved for issuance upon conversion of the Convertible Notes.

(3)	As of December 31, 2025, we had 5,000,000 shares of preferred stock authorized and no shares issued or outstanding.

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CERTAIN MATERIAL U.S. FEDERAL INCOME TAX CONSIDERATIONS

General

The following is a summary of certain material U.S. federal income tax considerations related to the ownership and disposition of our common stock by U.S. holders and non-U.S. holders, each as defined below, acquired pursuant to this offering. This discussion assumes that a holder will hold shares of our common stock issued pursuant to this offering as capital assets within the meaning of Section 1221 of the Internal Revenue Code of 1986, as amended (the “Code”) (generally, property held for investment purposes). This summary does not address all aspects of U.S. federal income taxation that may be relevant to a particular investor in light of the investor’s individual circumstances and does not purport to be a complete analysis of all the potential tax considerations relating thereto. In addition, this discussion does not address (i) other U.S. federal tax laws, such as estate and gift tax laws, (ii) state, local or non-U.S. tax consequences, (iii) the special tax rules that may apply to certain investors, including, without limitation, banks, mutual funds, insurance companies, other financial institutions, controlled foreign corporations, passive foreign investment companies, brokers, dealers or traders in securities, grantor trusts, personal holding companies, taxpayers who have elected mark-to-market accounting, tax-exempt entities, IRAs, regulated investment companies, real estate investment trusts, tax-qualified retirement plans, entities or arrangements classified as partnerships for U.S. federal income tax purposes or other pass-through entities (or investors in such entities or arrangements), pension plans, U.S. holders having a “functional currency” other than the U.S. dollar, corporations that accumulate earnings to avoid U.S. federal income tax, taxpayers required to accelerate the recognition of any item of gross income as a result of such income being reported on an applicable financial statement, taxpayers subject to the base erosion and anti-abuse tax, U.S. expatriates and former citizens or long-term residents of the United States, expatriated entities subject to Section 7874 of the Code, and “qualified foreign pension funds” as defined in Section 897(1)(2) of the Code and entities all of the interests of which are held by qualified foreign pension funds, (iv) the special tax rules that may apply to investors that acquire, hold, or dispose of our common stock as part of a straddle, hedge, constructive sale, conversion or other integrated or risk reduction transaction, and (v) the impact, if any, of any alternative minimum tax or the Medicare tax imposed on net investment income under Section 1411 of the Code.

This summary is based on current provisions of the Code, applicable Treasury regulations promulgated thereunder (the “Treasury Regulations”), judicial opinions, and published rulings of the Internal Revenue Service (the “IRS”), all as in effect on the date of this prospectus supplement and all of which are subject to differing interpretations or change, possibly with retroactive effect. We have not sought, and will not seek, any ruling from the IRS or any opinion of counsel with respect to the tax consequences discussed herein, and there can be no assurance that the IRS will not take a position contrary to the tax consequences discussed below or that any position taken by the IRS would not be sustained.

The tax treatment of an entity or arrangement treated as a partnership for U.S. federal income tax purposes and each partner thereof will generally depend upon the status and activities of the partnership and such partner. A holder that is treated as a partnership for U.S. federal income tax purposes or a partner in such partnership should consult its own tax advisor regarding the U.S. federal income tax consequences applicable to it and its partners of the ownership and disposition of our common stock.

THIS DISCUSSION IS ONLY A SUMMARY OF CERTAIN MATERIAL U.S. FEDERAL INCOME TAX CONSIDERATIONS RELATED TO THE OWNERSHIP AND DISPOSITION OF OUR COMMON STOCK BY U.S. HOLDERS AND NON-U.S. HOLDERS. IT IS NOT TAX ADVICE. EACH PROSPECTIVE INVESTOR SHOULD CONSULT ITS OWN TAX ADVISOR WITH RESPECT TO THE PARTICULAR TAX CONSEQUENCES OF THE ACQUISITION, OWNERSHIP AND DISPOSITION OF OUR COMMON STOCK, INCLUDING THE APPLICABILITY AND EFFECT OF ANY STATE, LOCAL, AND NON-U.S. TAX LAWS, AS WELL AS U.S. FEDERAL ESTATE AND GIFT TAX LAWS, AND ANY APPLICABLE TAX TREATY.

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U.S. Holders

For purposes of this discussion, a “U.S. holder” is any beneficial owner of our common stock that, for U.S. federal income tax purposes, is treated as any of the following:

•

an individual who is a citizen or resident of the United States;

•

a corporation (or other entity treated as a corporation for U.S. federal income tax purposes) created or organized under the laws of the United States, any state thereof, or the District of Columbia;

•

an estate, the income of which is subject to U.S. federal income tax regardless of its source; or

•

a trust that (1) is subject to the primary supervision of a U.S. court and the control of one or more “United States persons” (within the meaning of Section 7701(a)(30) of the Code), or (2) has a valid election in effect to be treated as a United States person for U.S. federal income tax purposes.

Distributions on Common Stock

If we pay distributions in cash or other property to U.S. holders of shares of our common stock, such distributions generally will constitute dividends for U.S. federal income tax purposes to the extent paid from our current or accumulated earnings and profits, as determined under U.S. federal income tax principles. Distributions in excess of current and accumulated earnings and profits will constitute a return of capital that will be applied against and reduce (but not below zero) the U.S. holder’s adjusted tax basis in our common stock. Any remaining excess will be treated as gain realized on the sale or other disposition of the common stock with the tax consequences described under “—U.S. Holders—Sale or Other Taxable Disposition” below.

Dividends we pay to a U.S. holder that is a taxable corporation generally will qualify for the dividends received deduction if the requisite holding period is satisfied. With certain exceptions, and provided certain holding period requirements are met, dividends we pay to a non-corporate U.S. holder generally will constitute “qualified dividends” that will be subject to tax up to the maximum tax rate accorded to long-term capital gains.

Sale or Other Taxable Disposition

Upon a sale or other taxable disposition of our common stock, a U.S. holder generally will recognize capital gain or loss. Any such capital gain or loss generally will be long-term capital gain or loss if the U.S. holder’s holding period for the common stock so disposed of exceeds one year. Long-term capital gains recognized by non-corporate U.S. holders are eligible to be taxed at reduced rates relative to tax rates for short-term gains and other types of income. The deductibility of capital losses is subject to limitations.

Generally, the amount of gain or loss recognized by a U.S. holder is an amount equal to the difference between (i) the sum of the amount of cash and the fair market value of any property received in such disposition and (ii) the U.S. holder’s adjusted tax basis in its common stock so disposed of. A U.S. holder’s adjusted tax basis in its common stock generally will equal the U.S. holder’s initial basis less any prior distributions treated as a return of capital. A U.S. holder’s initial basis in its common stock received pursuant to this offering will generally equal the U.S. holder’s acquisition cost.

Information Reporting and Backup Withholding

In general, information reporting requirements may apply to dividends paid to a U.S. holder and to the proceeds of the sale or other disposition of our common stock, unless the U.S. holder is an exempt recipient. Backup withholding may apply to such payments if the U.S. holder fails to provide a taxpayer identification number or a certification of exempt status or has been notified by the IRS that it is subject to backup withholding (and such notification has not been withdrawn).

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Backup withholding is not an additional tax. Any amounts withheld under the backup withholding rules will be allowed as a refund or a credit against a U.S. holder’s U.S. federal income tax liability provided the required information is timely furnished to the IRS.

Non-U.S. Holders

For purposes of this discussion, a “non-U.S. holder” is any beneficial owner of our common stock that is neither a “U.S. holder” nor an entity or arrangement treated as a partnership for U.S. federal income tax purposes.

Distributions on Common Stock

If we pay cash or distribute property to holders of shares of common stock, such distributions generally will constitute dividends for U.S. federal income tax purposes to the extent paid from our current or accumulated earnings and profits, as determined under U.S. federal income tax principles. Distributions in excess of current and accumulated earnings and profits will constitute a return of capital that will be applied against and reduce (but not below zero) the non-U.S. holder’s adjusted tax basis in our common stock. Any remaining excess will be treated as gain from the sale or exchange of the common stock and will be treated as described under “—Non-U.S. Holders —Sale or Other Taxable Disposition” below.

Subject to the withholding requirements under FATCA (as defined and discussed below), dividends paid to a non-U.S. holder that are not effectively connected with the non-U.S. holder’s conduct of a trade or business in the United States generally will be subject to withholding of U.S. federal income tax at a rate of 30% of the gross amount of the dividend or such lower rate as may be specified by an applicable income tax treaty. A non-U.S. holder that wishes to claim the benefit of an applicable tax treaty withholding rate generally will be required to (i) duly complete and execute an IRS Form W-8BEN or an IRS Form W-8BEN-E (or any successor form of the foregoing) and certify under penalties of perjury that such holder is not a United States person and is eligible for the benefits of the applicable tax treaty or (ii) if our common stock is held through certain foreign intermediaries, satisfy the relevant certification requirements of applicable Treasury Regulations. These forms may need to be periodically updated.

A non-U.S. holder eligible for a reduced rate of withholding of U.S. federal income tax pursuant to an income tax treaty may be able to obtain a refund of any excess amounts withheld by timely filing an appropriate claim for refund with the IRS. Non-U.S. holders should consult their own tax advisors regarding their entitlement to benefits under an applicable income tax treaty and the manner of claiming the benefits of such treaty (including, without limitation, the need to obtain a U.S. taxpayer identification number).

Dividends that are effectively connected with a non-U.S. holder’s conduct of a trade or business in the United States (and, if required by an applicable income tax treaty, attributable to a permanent establishment or fixed base maintained by the non-U.S. holder in the United States) generally are subject to U.S. federal income tax on a net income basis at the U.S. federal income tax rates generally applicable to a United States person and are not subject to withholding of U.S. federal income tax, provided that the non-U.S. holder establishes an exemption from such withholding by complying with certain certification and disclosure requirements (generally by providing a duly completed and executed IRS Form W-8ECI (or any successor form thereof)).

Any such effectively connected dividends (and, if required, dividends attributable to a U.S. permanent establishment or fixed base) received by a non-U.S. holder that is treated as a foreign corporation for U.S. federal income tax purposes may be subject to an additional branch profits tax at a 30% rate, or such lower rate as may be specified by an applicable income tax treaty.

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Sale or Other Taxable Disposition

Subject to the summary below regarding backup withholding and FATCA, any gain recognized by a non-U.S. holder on a sale or other taxable disposition of our common stock generally will not be subject to U.S. federal income tax, unless:

(i)

the gain is effectively connected with the conduct of a trade or business of the non-U.S. holder in the United States (and, if required by an applicable income tax treaty, is attributable to a U.S. permanent establishment or fixed base of the non-U.S. holder),

(ii)

the non-U.S. holder is an individual who is present in the United States for a period or periods aggregating 183 days or more in the taxable year of that disposition, and certain other conditions are met, or

(iii)

we are or have been a United States real property holding corporation (a “USRPHC”) for U.S. federal income tax purposes at any time during the shorter of the five-year period ending on the date of disposition or the period that the non-U.S. holder held the common stock.

Any gain recognized by a non-U.S. holder that is described in clause (i) above generally will be subject to U.S. federal income tax, net of certain deductions, at the income tax rates generally applicable to a United States person, and such non-U.S. holder will be required to file a U.S. federal income tax return. Any gain of a non-U.S. holder that is treated as a foreign corporation for U.S. federal income tax purposes that is described in clause (i) above may also be subject to an additional branch profits tax at a 30% rate, or such lower rate as may be specified by an applicable income tax treaty.

An individual non-U.S. holder that is described in clause (ii) above generally will be subject to a flat 30% tax (or a lower applicable tax treaty rate) on the U.S. source capital gain derived from the disposition, which may be offset by U.S. source capital losses (assuming certain requirements are met, including timely filing of U.S. federal income tax returns with respect to such losses) during the taxable year of the disposition.

With respect to clause (iii) above, a U.S. corporation generally is a USRPHC if the fair market value of its U.S. real property interests equals or exceeds 50% of the sum of the fair market value of its worldwide real property interests plus its other assets used or held for use in a trade or business. Based on the nature of our business and the assets that we own, we expect that we are currently and will remain a USRPHC. Assuming we are a USRPHC, subject to the next sentence, a non-U.S. holder generally will be taxed on gain recognized on the sale, exchange or other taxable disposition of our common stock in the same manner as if such non-U.S. holder were a United States person and a 15% withholding tax may apply to the gross proceeds from the sale, exchange or other taxable disposition of our common stock (including a redemption treated as a sale or exchange for U.S. federal income tax purposes or a distribution treated as a return of capital, as described under “—Non-U.S. Holders—Distributions on Common Stock” above). A non-U.S. holder generally will not be subject to U.S. net federal income tax as a result of our being a USRPHC upon the disposition of our common stock as long as our common stock is “regularly traded on an established securities market” (within the meaning of the applicable Treasury Regulations) and such non-U.S. holder actually or constructively holds 5% or less of our common stock at any time during the shorter of the five-year period ending on the date of the sale or other taxable disposition or the non-U.S. holder’s holding period. Our common stock is currently listed on the NYSE and, although no assurance can be given, we expect that, for as long as our common stock continues to be so listed, the common stock will be treated as “regularly traded on an established securities market.”

Non-U.S. holders are urged to consult their own tax advisors regarding the potential applicability of these rules, as well as any income tax treaty in their particular circumstances.

Information Reporting and Backup Withholding

We generally must report annually to the IRS and to each non-U.S. holder of our common stock the amount of dividends paid to such holder on our common stock, the tax, if any, withheld with respect to those dividends,

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and such holder’s name and address regardless of whether withholding was reduced or eliminated by an applicable tax treaty. Copies of the information returns reporting those dividends and withholding taxes may also be made available to the tax authorities in the country in which the non-U.S. holder is a resident under the provisions of an applicable income tax treaty or agreement. Information reporting also is generally required with respect to the proceeds from sales and other dispositions of our common stock to or through the U.S. office (and, in certain cases, the foreign office) of a broker, unless the non-U.S. holder establishes that it is not a United States person.

Under some circumstances, Treasury Regulations require backup withholding of U.S. federal income tax on reportable payments with respect to our common stock. A non-U.S. holder generally may eliminate the requirement for backup withholding by providing certification of its foreign status, under penalties of perjury, on a duly completed and executed IRS Form W-8BEN, IRS Form W-8BEN-E, or other applicable IRS Form W-8 (or any successor form of the foregoing) or by otherwise establishing an exemption. Notwithstanding the foregoing, backup withholding and information reporting may apply if either we or our paying agent has actual knowledge, or reason to know, that a holder is a United States person. Backup withholding is not an additional tax. Rather, the amount of any backup withholding will be allowed as a credit against a non-U.S. holder’s U.S. federal income tax liability, if any, and may entitle such non-U.S. holder to a refund, provided that certain required information is timely furnished to the IRS. Non-U.S. holders are urged to consult their own tax advisors regarding the application of backup withholding and the availability of and procedure for obtaining an exemption from backup withholding in their particular circumstances.

Foreign Account Tax Compliance Act

Sections 1471 through 1474 of the Code and Treasury Regulations thereunder, commonly referred to as “FATCA,” generally impose a U.S. federal withholding tax of 30% on certain types of payments, including payments of U.S.-source dividends such as dividends, if any, paid on our common stock made to (i) “foreign financial institutions” (including, in some cases, when such foreign financial institution is acting as an intermediary) unless they agree to collect and disclose to the IRS information regarding their direct and indirect U.S. account holders and (ii) certain non-financial foreign entities (including, in some cases, when such non-financial foreign entity is acting as an intermediary) unless they certify certain information regarding their direct and indirect U.S. owners. The IRS has issued proposed Treasury Regulations (on which taxpayers may rely until final Treasury Regulations are issued) that would generally not apply these withholding requirements to gross proceeds from the disposition of assets such as our common stock. However, there can be no assurance that, if issued, final Treasury Regulations would provide an exemption from the FATCA withholding tax for gross proceeds. Foreign financial institutions located in jurisdictions that have an intergovernmental agreement with the United States governing FATCA may be subject to different rules.

We will not pay any additional amounts to non-U.S. holders in respect of any amounts withheld, including pursuant to FATCA. Under certain circumstances, a non-U.S. holder may be eligible for refunds or credits of such taxes. Non-U.S. holders are urged to consult with their own tax advisors regarding the effect, if any, of the FATCA provisions on them based on their particular circumstances.

THE PRECEDING DISCUSSION OF CERTAIN MATERIAL U.S. FEDERAL INCOME TAX CONSIDERATIONS IS FOR GENERAL INFORMATION ONLY AND IS NOT TAX ADVICE. INVESTORS CONSIDERING THE PURCHASE OF OUR COMMON STOCK ARE URGED TO CONSULT THEIR OWN TAX ADVISORS REGARDING THE APPLICATION OF THE U.S. FEDERAL INCOME TAX LAWS TO THEIR PARTICULAR SITUATIONS AND THE APPLICABILITY AND EFFECT OF U.S. FEDERAL ESTATE AND GIFT TAX LAWS AND ANY STATE, LOCAL OR NON-U.S. TAX LAWS AND TAX TREATIES.

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UNDERWRITING (CONFLICTS OF INTEREST)

We have entered into an underwriting agreement with BofA Securities, Inc., as the underwriter, with respect to the shares of common stock subject to this offering. Subject to the terms and conditions set forth in the underwriting agreement, we have agreed to sell to the underwriter, and the underwriter has agreed to purchase from us $200,000,000 of our shares of common stock as set forth on the cover page of this prospectus supplement.

Subject to the terms and conditions set forth in the underwriting agreement, the underwriter has agreed to purchase all of the shares sold under the underwriting agreement if any of these shares are purchased.

The underwriter has agreed to purchase the shares of our common stock from us at a price of $ per share, which will result in approximately $ million of proceeds to us before expenses. The underwriter proposes to offer the shares of common stock from time to time for sale in one or more transactions on the NYSE, in the over-the-counter market, through negotiated transactions or otherwise at market prices prevailing at the time of sale, at prices related to prevailing market prices or at negotiated prices, subject to receipt and acceptance by the underwriter and subject to its right to reject any order in whole or in part. In connection with the sale of the shares of common stock offered hereby, the underwriter may be deemed to have received compensation in the form of underwriting discounts. The underwriter may effect such transactions by selling shares of common stock to or through dealers, and such dealers may receive compensation in the form of discounts, concessions or commissions from the underwriter and / or purchasers of shares of common stock for whom the underwriter may act as agent or to whom the underwriter may sell as principal.

We have also agreed to reimburse the underwriter for certain of its expenses up to an amount of $15,000.

We have agreed to indemnify the underwriter against certain liabilities, including liabilities under the Securities Act, or to contribute to payments the underwriter may be required to make in respect of those liabilities.

The underwriter is offering the shares, subject to prior sale, when, as and if issued to and accepted by the underwriter, subject to approval of legal matters by its counsel, including the validity of the shares, and other conditions contained in the underwriting agreement, such as the receipt by the underwriter of officer’s certificates and legal opinions. The underwriter reserves the right to withdraw, cancel or modify offers to the public and to reject orders in whole or in part.

The expenses of the offering, not including the underwriting discount, are estimated at $ and are payable by us.

Option to Purchase Additional Shares

We have granted an option to the underwriter, exercisable for 30 days after the date of this prospectus supplement, to purchase up to $30,000,000 of additional shares from us at a price of $ per share. If the underwriter exercises this option, the underwriter will be obligated, subject to conditions contained in the underwriting agreement, to purchase such shares of common stock.

No Sales of Similar Securities

We, our executive officers and directors and affiliates have agreed not to sell or transfer any common stock or securities convertible into, exchangeable for, exercisable for, or repayable with common stock, for 45 days after the date of this prospectus supplement without first obtaining the written consent of BofA Securities, Inc.

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Specifically, we and these other persons have agreed, with certain limited exceptions, not to directly or indirectly:

•

offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, lend or otherwise transfer or dispose of, directly or indirectly, any common stock or any securities convertible into or exercisable or exchangeable for common stock, or

•

enter into any swap or other agreement that transfers, in whole or in part, any of the economic consequences of ownership of common stock.

This lock-up provision applies to common stock and to securities convertible into or exchangeable or exercisable for or repayable with common stock. It also applies to common stock owned now or acquired later by the person executing the agreement or for which the person executing the agreement later acquires the power of disposition.

NYSE Listing

The shares are listed on the NYSE under the symbol “NOG.”

Price Stabilization, Short Positions

Until the distribution of the shares is completed, SEC rules may limit underwriter and selling group members from bidding for and purchasing our common stock. However, the underwriter may engage in transactions that stabilize the price of the common stock, such as bids or purchases to peg, fix or maintain that price.

In connection with the offering, the underwriter may purchase and sell our common stock in the open market. These transactions may include short sales, purchases on the open market to cover positions created by short sales and stabilizing transactions. Short sales involve the sale by the underwriter of a greater number of shares than they are required to purchase in the offering. “Covered” short sales are sales made in an amount not greater than the underwriter’s option to purchase additional shares described above. The underwriter may close out any covered short position by either exercising its option to purchase additional shares or purchasing shares in the open market. In determining the source of shares to close out the covered short position, the underwriter will consider, among other things, the price of shares available for purchase in the open market as compared to the price at which they may purchase shares through the option granted to them. “Naked” short sales are sales in excess of such option. The underwriter must close out any naked short position by purchasing shares in the open market. A naked short position is more likely to be created if the underwriter is concerned that there may be downward pressure on the price of our common stock in the open market after pricing that could adversely affect investors who purchase in the offering. Stabilizing transactions consist of various bids for or purchases of shares of common stock made by the underwriter in the open market prior to the completion of the offering.

Similar to other purchase transactions, the underwriter’s purchases to cover the syndicate short sales may have the effect of raising or maintaining the market price of our common stock or preventing or retarding a decline in the market price of our common stock. As a result, the price of our common stock may be higher than the price that might otherwise exist in the open market. The underwriter may conduct these transactions on the NYSE, in the over-the-counter market or otherwise.

In addition, neither we nor the underwriter makes any representation that the underwriter will engage in these transactions or that these transactions, once commenced, will not be discontinued without notice.

Electronic Distribution

In connection with the offering, the underwriter or securities dealer may distribute prospectuses by electronic means, such as e-mail.

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Other Relationships

The underwriter and its affiliates have engaged in, and may in the future engage in, investment banking and other commercial dealings in the ordinary course of business with us or our affiliates. They have received, or may in the future receive, customary fees and commissions for these transactions.

In addition, in the ordinary course of its business activities, the underwriter and its affiliates may make or hold a broad array of investments and actively trade debt and equity securities (or related derivative securities) and financial instruments (including bank loans) for their own account and for the accounts of their customers. Such investments and securities activities may involve securities and/or instruments of ours or our affiliates. The underwriter and its affiliates may also make investment recommendations and/or publish or express independent research views in respect of such securities or financial instruments and may hold, or recommend to clients that they acquire, long and/or short positions in such securities and instruments. In addition, an affiliate of the underwriter is a lender under our Revolving Credit Facility and, therefore, may receive a portion of the net proceeds of this offering through any repayment of borrowings under our Revolving Credit Facility.

Conflicts of Interest

Because an affiliate of BofA Securities, Inc. is a lender under our Revolving Credit Facility and will receive 5% or more of the net proceeds of this offering due to the repayment of borrowings under our Revolving Credit Facility, BofA Securities, Inc. is deemed to have a “conflict of interest” under FINRA Rule 5121. Accordingly, this offering is being made in compliance with the requirements of FINRA Rule 5121. Pursuant to that rule, the appointment of a “qualified independent underwriter” is not required in connection with the offering as a “bona fide public market,” as defined in FINRA Rule 5121, exists for our common stock. BofA Securities, Inc. will not confirm any sales to any account over which it exercises discretionary authority without the specific written approval of the account holder.

Selling Restrictions

General

Other than in the United States, no action has been taken by us or the underwriter that would permit a public offering of the securities offered by this prospectus supplement in any jurisdiction where action for that purpose is required. The securities offered by this prospectus supplement may not be offered or sold, directly or indirectly, nor may this prospectus supplement or any other offering material or advertisements in connection with the offer and sale of any such securities be distributed or published in any jurisdiction, except under circumstances that will result in compliance with the applicable rules and regulations of that jurisdiction. Persons into whose possession this prospectus supplement comes are advised to inform themselves about and to observe any restrictions relating to the offering and the distribution of this prospectus supplement. This prospectus supplement does not constitute an offer to sell or a solicitation of an offer to buy any securities offered by this prospectus supplement in any jurisdiction in which such an offer or a solicitation is unlawful.

Notice To Prospective Investors In The European Economic Area

In relation to each Member State of the European Economic Area (each, a “Relevant Member State”), no offer of shares may be made to the public in that Relevant Member State other than:

•

to any legal entity which is a qualified investor as defined in the Prospectus Directive;

•

to fewer than 100 or, if the Relevant Member State has implemented the relevant provision of the 2010 PD Amending Directive, 150, natural or legal persons (other than qualified investors as defined in the Prospectus Directive), as permitted under the Prospectus Directive, subject to obtaining the prior consent of the underwriter; or

•

in any other circumstances falling within Article 3(2) of the Prospectus Directive,

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provided that no such offer of shares shall require the Company or the underwriter to publish a prospectus pursuant to Article 3 of the Prospectus Directive.

Each person in a Relevant Member State who initially acquires any shares or to whom any offer is made will be deemed to have represented, acknowledged and agreed that it is a “qualified investor” within the meaning of the law in that Relevant Member State implementing Article 2(1)(e) of the Prospectus Directive. In the case of any shares being offered to a financial intermediary as that term is used in Article 3(2) of the Prospectus Directive, each such financial intermediary will be deemed to have represented, acknowledged and agreed that the shares acquired by it in the offer have not been acquired on a non-discretionary basis on behalf of, nor have they been acquired with a view to their offer or resale to, persons in circumstances which may give rise to an offer of any shares to the public other than their offer or resale in a Relevant Member State to qualified investors as so defined or in circumstances in which the prior consent of the underwriter has been obtained to each such proposed offer or resale.

The Company, the underwriter and their affiliates will rely upon the truth and accuracy of the foregoing representations, acknowledgements and agreements.

This prospectus supplement has been prepared on the basis that any offer of shares in any Relevant Member State will be made pursuant to an exemption under the Prospectus Directive from the requirement to publish a prospectus for offers of shares. Accordingly any person making or intending to make an offer in that Relevant Member State of shares which are the subject of the offering contemplated in this prospectus supplement may only do so in circumstances in which no obligation arises for the Company or the underwriter to publish a prospectus pursuant to Article 3 of the Prospectus Directive in relation to such offer. Neither the Company nor the underwriter has authorized, nor does either authorize, the making of any offer of shares in circumstances in which an obligation arises for the Company or the underwriter to publish a prospectus for such offer.

For the purpose of the above provisions, the expression “an offer to the public” in relation to any shares in any Relevant Member State means the communication in any form and by any means of sufficient information on the terms of the offer and the shares to be offered so as to enable an investor to decide to purchase or subscribe the shares, as the same may be varied in the Relevant Member State by any measure implementing the Prospectus Directive in the Relevant Member State and the expression “Prospectus Directive” means Directive 2003/71/EC (including the 2010 PD Amending Directive, to the extent implemented in the Relevant Member States) and includes any relevant implementing measure in the Relevant Member State and the expression “2010 PD Amending Directive” means Directive 2010/73/EU.

Notice To Prospective Investors In The United Kingdom

This prospectus has not been approved by an authorised person in the U.K. This prospectus is for distribution only to persons who: (i) have professional experience in matters relating to investments falling within Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended (the “Financial Promotion Order”); (ii) are persons falling within Article 49(2)(a) to (d) (high net worth companies, unincorporated associations, etc.) of the Financial Promotion Order; (iii) are outside the United Kingdom, or (iv) are persons to whom an invitation or inducement to engage in investment activity (within the meaning of section 21 of the Financial Services and Markets Act 2000) in connection with the issue or sale of any securities may otherwise lawfully be communicated or caused to be communicated (all such persons together being referred to as “relevant persons”). This prospectus is directed only at relevant persons and must not be acted on or relied on by persons who are not relevant persons. Any investment or investment activity to which this prospectus relates is available only to relevant persons and will be engaged in only with relevant persons.

Notice To Prospective Investors In Switzerland

The offering of the securities in Switzerland is exempt from requirement to prepare and publish a prospectus under the Swiss Financial Services Act (“FinSA”) because such offering is made to professional clients within

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the meaning of the FinSA only and the securities will not be admitted to trading on any trading venue (exchange or multilateral trading facility) in Switzerland. This offering memorandum does not constitute a prospectus pursuant to the FinSA, and no such prospectus has been or will be prepared for or in connection with the offering of the securities.

Notice To Prospective Investors In The Dubai International Financial Centre (“DIFC”)

This offering document relates to an exempt offer which is not subject to any form of regulation or approval by the Dubai Financial Services Authority (the “DFSA”). The DFSA has not approved this offering document nor has any responsibility for reviewing or verifying any document or other documents in connection with the offering. Accordingly, the DFSA has not approved this offering document or any other associated documents nor taken any steps to verify the information set out in this offering document, and has no responsibility for it. The securities have not been offered and will not be offered to any persons in the DIFC except on the basis that an offer is:

(i)

an “Exempt Offer” in accordance with the Markets Rules (MKT) Module of the DFSA Rulebook; and

(ii)

made only to persons who meet the “Deemed Professional Client” criteria set out in Rule 2.3.4 of the Conduct of Business (COB) module of the DFSA Rulebook, who are not natural persons.

Notice To Prospective Investors In Australia

No placement document, prospectus, product disclosure statement or other disclosure document has been lodged with the Australian Securities and Investments Commission (“ASIC”), in relation to the offering. This prospectus supplement does not constitute a prospectus, product disclosure statement or other disclosure document under the Corporations Act 2001 (the “Corporations Act”), and does not purport to include the information required for a prospectus, product disclosure statement or other disclosure document under the Corporations Act.

Any offer in Australia of the shares may only be made to persons (the “Exempt Investors”) who are “sophisticated investors” (within the meaning of section 708(8) of the Corporations Act), “professional investors” (within the meaning of section 708(11) of the Corporations Act) or otherwise pursuant to one or more exemptions contained in section 708 of the Corporations Act so that it is lawful to offer the shares without disclosure to investors under Chapter 6D of the Corporations Act.

The shares applied for by Exempt Investors in Australia must not be offered for sale in Australia in the period of 12 months after the date of allotment under the offering, except in circumstances where disclosure to investors under Chapter 6D of the Corporations Act would not be required pursuant to an exemption under section 708 of the Corporations Act or otherwise or where the offer is pursuant to a disclosure document which complies with Chapter 6D of the Corporations Act. Any person acquiring shares must observe such Australian on-sale restrictions.

This prospectus supplement contains general information only and does not take account of the investment objectives, financial situation or particular needs of any particular person. It does not contain any securities recommendations or financial product advice. Before making an investment decision, investors need to consider whether the information in this prospectus supplement is appropriate to their needs, objectives and circumstances, and, if necessary, seek expert advice on those matters.

Notice To Prospective Investors In Hong Kong

No securities have been offered or sold, and no securities may be offered or sold, in Hong Kong, by means of any document, other than to persons whose ordinary business is to buy or sell shares or debentures, whether as principal or agent; or to “professional investors” as defined in the Securities and Futures Ordinance (Cap. 571) of Hong Kong (“SFO”) and any rules made under that Ordinance; or in other circumstances which do not result in

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the document being a “prospectus” as defined in the Companies Ordinance (Cap. 32) of Hong Kong (“CO”) or which do not constitute an offer or invitation to the public for the purpose of the CO or the SFO. No document, invitation or advertisement relating to the securities has been issued or may be issued or may be in the possession of any person for the purpose of issue (in each case whether in Hong Kong or elsewhere), which is directed at, or the contents of which are likely to be accessed or read by, the public of Hong Kong (except if permitted under the securities laws of Hong Kong) other than with respect to securities which are or are intended to be disposed of only to persons outside Hong Kong or only to “professional investors” as defined in the SFO and any rules made under that Ordinance.

This prospectus has not been registered with the Registrar of Companies in Hong Kong. Accordingly, this prospectus may not be issued, circulated or distributed in Hong Kong, and the securities may not be offered for subscription to members of the public in Hong Kong. Each person acquiring the securities will be required, and is deemed by the acquisition of the securities, to confirm that he is aware of the restriction on offers of the securities described in this prospectus and the relevant offering documents and that he is not acquiring, and has not been offered any securities in circumstances that contravene any such restrictions.

Notice To Prospective Investors In Japan

The offering has not been and will not be registered under the Financial Instruments and Exchange Act of Japan (Act No. 25 of 1948 of Japan, as amended, the “FIEA”), and the Initial Purchaser will not offer or sell any securities, directly or indirectly, in Japan or to, or for the benefit of, any resident of Japan (which term as used herein means any person resident in Japan, including any corporation or other entity organized under the laws of Japan), or to others for re-offering or resale, directly or indirectly, in Japan or to, or for the benefit of, any resident of Japan, except pursuant to an exemption from the registration requirements of, and otherwise in compliance with, the FIFA and any other applicable laws, regulations and ministerial guidelines of Japan.

Notice To Prospective Investors In Singapore

This prospectus has not been and will not be lodged or registered as a prospectus with the Monetary Authority of Singapore. Accordingly, this prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of the notes may not be circulated or distributed, nor may the notes be offered or sold, or be made the subject of an invitation for subscription or purchase, whether directly or indirectly, to any person in Singapore other than (i) to an institutional investor (as defined in Section 4A of the SFA) pursuant to Section 274 of the SFA or (ii) to an accredited investor (as defined in Section 4A of the SFA) pursuant to and in accordance with the conditions specified in Section 275 of the SFA and (where applicable) Regulation 3 of the Securities and Futures (Classes of Investors) Regulations 2018.

Any reference to the “SFA” is a reference to the Securities and Futures Act 2001 of Singapore, as modified or amended from time to time and a reference to any term as defined in the SFA or any provision in the SFA is a reference to that term or provision as modified or amended from time to time including by such of its subsidiary legislation as may be applicable at the relevant time.

Notice To Prospective Investors In Canada

The securities may be sold only to purchasers purchasing, or deemed to be purchasing, as principal that are accredited investors, as defined in National Instrument 45-106 Prospectus Exemptions, and are permitted clients, as defined in National Instrument 31-103 Registration Requirements, Exemptions and Ongoing Registrant Obligations. Any resale of the securities must be made in accordance with an exemption from, or in a transaction not subject to, the prospectus requirements of applicable securities laws.

Securities legislation in certain provinces or territories of Canada may provide a purchaser with remedies for rescission or damages if this prospectus (including any amendment thereto) contains a misrepresentation,

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provided that the remedies for rescission or damages are exercised by the purchaser within the time limit prescribed by the securities legislation of the purchaser’s province or territory. The purchaser should refer to any applicable provisions of the securities legislation of the purchaser’s province or territory for particulars of these rights or consult with a legal advisor.

Pursuant to section 3A.3 (or, in the case of securities issued or guaranteed by the government of a non-Canadian jurisdiction, section 3A.4) of National Instrument 33-105 Underwriting Conflicts (NI 33-105), the underwriter is not required to comply with the disclosure requirements of NI 33-105 regarding underwriter conflicts of interest in connection with this offering.

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LEGAL MATTERS

The validity of the issuance of the common stock and certain other legal matters in connection with the issuance of the common stock will be passed upon for us by Kirkland & Ellis LLP, Houston, Texas. Certain matters will be passed upon for the underwriter by Latham & Watkins LLP, Austin, Texas.

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EXPERTS

The financial statements of Northern Oil and Gas, Inc. as of December 31, 2025 and 2024, and for each of the three years in the period ended December 31, 2025, incorporated by reference in this prospectus supplement, and the effectiveness of Northern Oil and Gas, Inc.’s internal control over financial reporting have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their reports. Such financial statements are incorporated by reference in reliance upon the reports of such firm given their authority as experts in accounting and auditing.

Certain estimates of our oil and natural gas reserves and related information included or incorporated by reference in this prospectus supplement have been derived from the reports prepared by Cawley, Gillespie & Associates, Inc. All such information has been so included or incorporated by reference on the authority of such firm as an expert regarding the matters contained in its reports.

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WHERE YOU CAN FIND MORE INFORMATION

We are subject to the information and periodic reporting requirements of the Exchange Act and, in accordance therewith, file periodic reports, proxy statements and other information with the SEC. Such periodic reports, proxy statements and other information are available at the website of the SEC at http://www.sec.gov. We also furnish our stockholders with annual reports containing our financial statements audited by an independent registered public accounting firm and quarterly reports containing our unaudited financial information. We maintain a website at www.noginc.com. You may access our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to those reports, filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act with the SEC free of charge at our website as soon as reasonably practicable after this material is electronically filed with, or furnished to, the SEC. Information contained on, or that is or becomes accessible through, our website does not constitute a part of this prospectus supplement. The reference to our website or web address does not constitute incorporation by reference of the information contained at that site.

The SEC allows us to “incorporate by reference” the information we file with it, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is an important part of this prospectus supplement and the accompanying prospectus, and information that we file later with the SEC will automatically update and supersede this information. We incorporate by reference the documents listed below and any future filings made with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act from the date of the prospectus until all of the shares of common stock offered hereby have been sold or the offering is otherwise terminated (in each case, other than any portions of any such documents that are not deemed “filed” under the Exchange Act in accordance with the Exchange Act and applicable SEC rules):

•

our Annual Report on Form 10-K for the fiscal year ended December 31, 2025, filed with the SEC on February 26, 2026;

•

the information specifically incorporated by reference into our Annual Report on Form 10-K for the fiscal year ended December 31, 2024 from our Definitive Proxy Statement on Schedule 14A, filed with the SEC on April 11, 2025;

•

our Current Report on Form 8-K filed with the SEC on February 24, 2026; and

•

our Form 8-A filed with the SEC on February 14, 2022.

You may request a copy of these filings, at no cost, by writing or telephoning us at the following address:

Chad Allen, Chief Financial Officer

Northern Oil and Gas, Inc.

4350 Baker Road, Suite 400

Minnetonka, Minnesota 55343

(952) 476-9800

You should rely only on the information incorporated by reference or provided in this prospectus supplement or the accompanying prospectus. We have not authorized anyone else to provide you with different information. You should not assume that the information in this prospectus supplement or the accompanying prospectus is accurate as of any date other than the date on the front of those documents.

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PROSPECTUS

Northern Oil and Gas, Inc.

LOGO

Common Stock

Preferred Stock

Depositary Shares

Warrants

Purchase Contracts

Units

This prospectus provides you with a general description of the common stock, preferred stock, depositary shares, warrants, purchase contracts and units that we may issue. Each time we sell securities, we will provide a prospectus supplement that will contain specific information about the terms of that offering. Such prospectus supplement may also add, update or change information contained in this prospectus. You should carefully read this prospectus and the applicable prospectus supplement together with the additional information described under the heading “Where You Can Find More Information” before you invest in any of our securities.

We may offer and sell the securities described in this prospectus and any prospectus supplement to or through one or more underwriters, dealers and agents, or directly to purchasers, or through a combination of these methods. If any underwriters, dealers or agents are involved in the sale of any of the securities, their names and any applicable purchase price, fee, commission or discount arrangement between or among them will be set forth, or will be calculable from the information set forth, in the applicable prospectus supplement. See the sections of this prospectus entitled “About this Prospectus” and “Plan of Distribution” for more information. No securities may be sold without delivery of this prospectus and the applicable prospectus supplement describing the method and terms of the offering of such securities.

Our common stock is listed on the New York Stock Exchange (“NYSE”) under the symbol “NOG.” The applicable prospectus supplement will contain information, where applicable, as to any other listing on the NYSE or any securities market or other exchange of the securities, if any, covered by the applicable prospectus supplement.

Investing in our securities involves risks. You should consider the risk factors referred to in the section entitled “Risk Factors” on page 4 of this prospectus and in any prospectus supplement hereto, as well as documents we file with the Securities and Exchange Commission that are incorporated by reference in this prospectus.

Neither the Securities and Exchange Commission nor any state securities commission or other regulatory body has approved or disapproved of these securities or passed upon the accuracy or adequacy of this prospectus. Any representation to the contrary is a criminal offense.

The date of this prospectus is May 15, 2023.

TABLE OF CONTENTS


	Page
ABOUT THIS PROSPECTUS		1
WHERE YOU CAN FIND MORE INFORMATION		2
CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS		3
RISK FACTORS		4
THE COMPANY		5
USE OF PROCEEDS		6
DESCRIPTION OF CAPITAL STOCK		7
DESCRIPTION OF DEPOSITARY SHARES		11
DESCRIPTION OF WARRANTS		12
DESCRIPTION OF PURCHASE CONTRACTS		14
DESCRIPTION OF UNITS		15
PLAN OF DISTRIBUTION		17
LEGAL MATTERS		21
EXPERTS		21

The distribution of this prospectus and the applicable prospectus supplement and the offering of the securities in certain jurisdictions may be restricted by law. Persons into whose possession this prospectus and the applicable prospectus supplement come should inform themselves about and observe any such restrictions. This prospectus and the applicable prospectus supplement do not constitute, and may not be used in connection with, an offer or solicitation by anyone in any jurisdiction in which such offer or solicitation is not authorized or in which the person making such offer or solicitation is not qualified to do so or to any person to whom it is unlawful to make such offer or solicitation.

ABOUT THIS PROSPECTUS

This prospectus is part of an “automatic shelf” registration statement that we filed with the Securities and Exchange Commission (the “SEC”) as a “well-known seasoned issuer” as defined in Rule 405 under the Securities Act of 1933, as amended (the “Securities Act”), using a “shelf” registration process. Under this process, we may sell common stock, preferred stock, depositary shares, warrants, purchase contracts and/or units consisting of any combination of such securities, either individually or in combination with other securities, in one or more offerings.

This prospectus provides you with a general description of the common stock, preferred stock, depositary shares, warrants, purchase contracts or units that we may issue. Each time we sell securities, we will provide a prospectus supplement that will contain specific information about the terms of those securities and that offering. Such prospectus supplement may also add, update or change information contained in this prospectus. You should carefully read this prospectus and the applicable prospectus supplement as well as additional information incorporated by reference herein and described under the heading “Where You Can Find More Information” before you invest in our securities. We may also prepare free writing prospectuses that describe particular securities. Any free writing prospectus should also be read in connection with this prospectus and with any prospectus supplement referred to therein. For purposes of this prospectus, any reference to an applicable prospectus supplement may also refer to a free writing prospectus, unless the context otherwise requires.

The registration statement that contains this prospectus, including the exhibits to the registration statement, contains additional information about us and the securities offered under this prospectus. That registration statement can be read at the SEC web site mentioned under the heading “Where You Can Find More Information.”

When we refer to the “Company,” “we,” “us” or “our” in this prospectus or when we otherwise refer to ourselves in this prospectus, we mean Northern Oil and Gas, Inc., a Delaware corporation.

WHERE YOU CAN FIND MORE INFORMATION

We are subject to the information and periodic reporting requirements of the Exchange Act and, in accordance therewith, file periodic reports, proxy statements and other information with the SEC. Such periodic reports, proxy statements and other information are available at the website of the SEC at http://www.sec.gov. We also furnish our stockholders with annual reports containing our financial statements audited by an independent registered public accounting firm and quarterly reports containing our unaudited financial information. We maintain a website at www.northernoil.com. You may access our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to those reports, filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act with the SEC free of charge at our website as soon as reasonably practicable after this material is electronically filed with, or furnished to, the SEC. Information contained on, or that is or becomes accessible through, our website does not constitute a part of this prospectus. The reference to our website or web address does not constitute incorporation by reference of the information contained at that site.

The SEC allows us to “incorporate by reference” the information we file with it, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is an important part of this prospectus, and information that we file later with the SEC will automatically update and supersede this information. We incorporate by reference the documents listed below and any future filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this prospectus and before the termination of the offering under this prospectus (in each case, other than portions of those documents that are either (i) described in paragraph (e) of Item 201 of Regulation S-K or paragraphs (d)(1)-(3) and (e)(5) of Item 407 of Regulation S-K or (ii) otherwise deemed to have been furnished and not filed in accordance with SEC rules, including pursuant to Item 2.02 or Item 7.01 of any Current Report on Form 8-K (including any financial statements or exhibits relating thereto furnished pursuant to Item 9.01), unless otherwise indicated therein):

•

our Annual Report on Form 10-K for the fiscal year ended December 31, 2022, filed with the SEC on February 24, 2023;

•

our Definitive Proxy Statement on Schedule 14A for the 2023 Annual Meeting of Stockholders filed with the SEC on April 23, 2023 (solely those portions that were incorporated by reference into Part III of our Annual Report on Form 10-K for the year ended December 31, 2022);

•

our Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2023, filed with the SEC on May 5, 2023;

•

our Current Reports on Form 8-K filed with the SEC on each of January 9, 2023, January 20, 2023, and May 8, 2023; and

•

the description of our common stock contained in our Registration Statement on Form 8-A filed with the SEC on February 14, 2022, including any amendments or reports filed for the purpose of updating such description.

You may request a copy of these filings, at no cost, by writing or telephoning us at the following address:

Erik J. Romslo

Chief Legal Officer and Secretary

Northern Oil and Gas, Inc.

4350 Baker Road – Suite 400

Minnetonka, Minnesota 55343

(952) 476-9800

You should rely only on the information incorporated by reference or provided in this prospectus or any accompanying prospectus supplement. We have not authorized anyone else to provide you with different information. You should not assume that the information in this prospectus or any accompanying prospectus supplement is accurate as of any date other than the date on the front of those documents.

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

This prospectus contains forward-looking statements regarding future events and our future results that are subject to the safe harbors created under the Securities Act and the Securities Exchange Act of 1934, as amended (the “Exchange Act”). All statements other than statements of historical facts included in this prospectus regarding our financial position, business strategy, plans and objectives of management for future operations, industry conditions, indebtedness covenant compliance, capital expenditures, production, cash flow and impairment are forward-looking statements. When used in this prospectus, forward-looking statements are generally accompanied by terms or phrases such as “estimate,” “project,” “predict,” “believe,” “expect,” “continue,” “anticipate,” “target,” “could,” “plan,” “intend,” “seek,” “goal,” “will,” “should,” “may” or other words and similar expressions that convey the uncertainty of future events or outcomes. Items contemplating or making assumptions about actual or potential future production, sales, market size, collaborations, cash flows, and trends or operating results also constitute such forward-looking statements.

Forward-looking statements involve inherent risks and uncertainties, and important factors (many of which are beyond our control) that could cause actual results to differ materially from those set forth in the forward-looking statements, including the following: changes in crude oil and natural gas prices, the pace of drilling and completions activity on our current properties and properties pending acquisition; infrastructure constraints and related factors affecting our properties; cost inflation or supply chain disruptions; ongoing legal disputes over, and potential shutdown of, the Dakota Access Pipeline; our ability to acquire additional development opportunities, potential or pending acquisition transactions, the projected capital efficiency savings and other operating efficiencies and synergies resulting from our acquisition transactions, integration and benefits of property acquisitions, or the effects of such acquisitions on our cash position and levels of indebtedness; changes in our reserves estimates or the value thereof; disruption to our business due to acquisitions and other significant transactions; general economic or industry conditions, nationally and/or in the communities in which we conduct business; changes in the interest rate environment, legislation or regulatory requirements, conditions of the securities markets; risks associated with the Company’s 3.625% convertible senior notes due 2029 (the “Convertible Notes”), including the potential impact that the Convertible Notes may have on the Company’s financial position and liquidity, potential dilution, and that provisions of the Convertible Notes could delay or prevent a beneficial takeover of the Company; the potential impact of the capped call transactions undertaken in tandem with the Convertible Notes issuance, including counterparty risk; increasing attention to environmental, social and governance matters; our ability to consummate any pending acquisition transactions; other risks and uncertainties related to the closing of pending acquisition transactions; our ability to raise or access capital; cyber-incidents could have a material adverse effect on our business, financial condition or results of operations; changes in accounting principles, policies or guidelines; events beyond our control, including a global or domestic health crisis, acts of terrorism, political or economic instability or armed conflict in oil and gas producing regions; and other economic, competitive, governmental, regulatory and technical factors affecting our operations, products and prices.

We have based any forward-looking statements on our current expectations and assumptions about future events. While our management considers these expectations and assumptions to be reasonable, they are inherently subject to significant business, economic, competitive, regulatory and other risks, contingencies and uncertainties, most of which are difficult to predict and many of which are beyond our control. Accordingly, results actually achieved may differ materially from expected results described in these statements. Forward-looking statements speak only as of the date they are made. You should consider carefully the statements under the heading “Risk Factors” herein, in our Annual Report on Form 10-K for the year ended December 31, 2022, as updated by subsequent reports we file with the SEC, and the other documents incorporated by reference herein that describe factors that could cause our actual results to differ from those set forth in the forward-looking statements. We do not undertake, and specifically disclaim, any obligation to update any forward-looking statements to reflect events or circumstances occurring after the date of such statements, other than as may be required by applicable law or regulation.

RISK FACTORS

An investment in our securities involves a high degree of risk. Before making an investment decision, you should carefully consider the risks, uncertainties and additional information (i) set forth in our most recent Annual Report on Form 10-K, any subsequent Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, which are incorporated, or deemed to be incorporated, by reference into this prospectus, and in the other documents that we file with the SEC and are incorporated by reference in this prospectus and (ii) contained in or incorporated by reference into the applicable prospectus supplement and any applicable free writing prospectus. Our business, financial condition or results of operations could be materially and adversely affected by any of those risks. In such case, the trading price of our securities could decline and investors could lose all or part of their investment. See the section entitled “Where You Can Find More Information” in this prospectus.

THE COMPANY

We are an independent energy company engaged in the acquisition, exploration, development and production of oil and natural gas properties in the United States, primarily in the Williston Basin, the Appalachian Basin and the Permian Basin. We believe the location, size and concentration of our acreage positions in some of North America’s leading unconventional oil and gas resource plays provide us with drilling and development opportunities that will result in significant long-term value.

Our primary focus is investing in non-operated minority working and mineral interests in oil and gas properties, with a core area of focus in three premier basins within the United States. As a non-operator, we are able to diversify our investment exposure by participating in a large number of gross wells, as well as entering into additional project areas by partnering with numerous experienced operating partners or pursuing value enhancing acquisitions. In addition, because we can generally elect to participate on a well by well basis, we believe we have increased flexibility in the timing and amount of our capital expenditures because we are not burdened with various contractual arrangements with respect to minimum drilling obligations. Further, we are able to avoid exploratory and infrastructure costs incurred by many oil and gas producers.

We seek to create value through strategic acquisitions and partnering with operators who have significant experience in developing and producing hydrocarbons in our core areas. We have more than 95 experienced operating partners that provide technical insights and opportunities for acquisitions. Across these operators, no single operator represented more than 14% of our first quarter 2023 oil and natural gas sales.

Prior to 2020, we focused our operations exclusively on oil-weighted properties in the Williston Basin. We first expanded beyond the Williston Basin in 2020, with several small acquisitions in the Permian Basin. In 2021 and 2022, we accelerated our diversification outside the Williston Basin via larger acquisitions, including the acquisition of significant producing natural gas properties in the Appalachian Basin and several acquisitions in the Permian Basin. We have also added to our legacy position in the Williston Basin via larger acquisitions.

We were initially incorporated in Minnesota in 2010 as the successor to a business formed in 2007, and we converted from a Minnesota corporation to a Delaware corporation in May 2018. Our executive offices are located at 4350 Baker Road, Suite 400, Minnetonka, Minnesota 55343, and our telephone number is 952-476-9800.

USE OF PROCEEDS

Unless otherwise specified in a prospectus supplement accompanying this prospectus, the net proceeds from the sale by us of the securities to which this prospectus relates will be used for general corporate purposes. General corporate purposes may include, without limitation, acquisitions, additions to working capital, capital expenditures, and repayment or refinancing of debt. Net proceeds may be temporarily invested prior to use.

DESCRIPTION OF CAPITAL STOCK

The summary of general terms and provisions of our capital stock set forth below does not purport to be complete and is subject to and qualified by reference to our Restated Certificate of Incorporation (our “Certificate of Incorporation”), as amended by the Certificate of Amendment to our Certificate of Incorporation, dated September 18, 2020, and our Amended and Restated Bylaws (our “Bylaws,” and together with our Certificate of Incorporation, our “Charter Documents”), each of which is included as an exhibit to the our most recent Annual Report on Form 10-K filed with the SEC and incorporated by reference herein. For additional information, please read our Charter Documents and the applicable provisions of the Delaware General Corporation Law (the “DGCL”).

Authorized Capital Stock

We are authorized to issue up to 140,000,000 shares, of which (i) 135,000,000 have been designated common stock, par value $0.001 per share, and (ii) 5,000,000 have been designated preferred stock, par value $0.001 per share.

Common Stock

Shares Outstanding

As of May 10, 2023, 85,363,723 shares of common stock were issued and outstanding. All of the outstanding shares of common stock are validly issued, fully paid, and non-assessable.

Voting Rights

The holders of shares of common stock have the exclusive power to vote on all matters presented to our stockholders unless Delaware law or the certificate of designation for an outstanding series of preferred stock gives the holders of that series of preferred stock the right to vote on certain matters. Each holder of shares of common stock is entitled to one vote per share.

Except with respect to the election of directors or as otherwise required by law, all questions submitted to a vote of our stockholders are decided by the affirmative vote of the holders of the greater of (a) a majority of the voting power of the shares present and entitled to vote on that item of business or (b) a majority of the voting power of the minimum number of shares entitled to vote that would constitute a quorum for the transaction of business at a duly held meeting of stockholders. Directors are elected by a plurality of the voting power of the shares present and entitled to vote on the election of directors at a meeting at which a quorum is present, and stockholders are not entitled to cumulate their votes for the election of directors.

Dividend Rights

Subject to any prior rights of any preferred stock then outstanding, the holders of shares of common stock are entitled to receive dividends ratably out of funds legally available, when and if declared by our board of directors (our “Board”).

Liquidation Rights

Upon any liquidation, dissolution or winding up of the Company, voluntary or involuntary, after the payment in full of all amounts to which the holders of shares of preferred stock shall be entitled and payment or provision for payment of our debts, the remaining assets of the Company to be distributed to the holders of the stock of the Company shall be distributed equally, on a per share basis, among the holders of the shares of common stock.

No Preemptive, Redemption or Convertible Rights

The holders of common stock shall have no preemptive rights to subscribe to any or all additional issues of common stock or any securities of the Company convertible into common stock. The common stock is not redeemable nor convertible.

Listing

The common stock is currently listed on the NYSE under the symbol “NOG.”

Preferred Stock

Unless required by law or by any stock exchange, the authorized shares of preferred stock will be available for issuance without further action by our stockholders. Our Board is able to determine, with respect to any series of preferred stock, the terms and rights of that series. If we offer preferred stock, the applicable prospectus supplement will describe the terms, including the following, if applicable:

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the designation of the series;

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the number of shares of the series;

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whether dividends, if any, will be cumulative or non-cumulative and the dividend rate of the series;

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the dates at which dividends, if any, will be payable;

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the redemption rights and price or prices, if any, for shares of the series;

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the terms and amounts of any sinking fund provided for the purchase or redemption of shares of the series;

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the amounts payable on shares of the series in the event of any voluntary or involuntary liquidation, dissolution or winding-up of the affairs of the Company;

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whether the shares of the series will be convertible into shares of any other class or series, or any other security, of the Company or any other corporation, and, if so, the specification of the other class or series or other security, the conversion price or prices or rate or rates, any rate adjustments, the date or dates as of which the shares will be convertible and all other terms and conditions upon which the conversion may be made;

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restrictions on the issuance of shares of the same series or of any other class or series; and

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the voting rights, if any, of the holders of the series.

Accordingly, we could issue a series of preferred stock that could, depending on the terms of the series, impede or discourage an acquisition attempt or other transaction that some, or a majority, of common stockholders might believe to be in their best interests or in which common stockholders might receive a premium for their common stock over the market price of the common stock.

Anti-Takeover Provisions

Advance Notice Requirements for Director Nominations and Stockholder Proposals

Our Bylaws provide that stockholders seeking to nominate candidates for election as directors or to bring business before an annual meeting of stockholders must provide timely notice of their proposal in writing to our corporate secretary. Any such stockholder must be a stockholder of record at the time such notice is delivered to the corporate secretary, at the time of the record date of the annual meeting and at the time of the annual meeting, and must be appear, or be represented by proxy, at the applicable annual meeting.

Generally, to be timely, a stockholder’s notice must be received at our principal executive offices not less than 90 days, nor earlier than 120 days, prior to the first anniversary of the previous year’s annual meeting; provided, however, that if the date of the annual meeting is advanced or delayed by more than 30 days before or 60 days after such anniversary date, such notice must be delivered to the corporate secretary not earlier than the close of business on the 120th day prior to such annual meeting and not later than the close of business on the later of the 90th day prior to such annual meeting or the tenth day following the day on which the public announcement of the date of such annual meeting is first made by us.

Our Bylaws also specify detailed requirements as to the form and content of a stockholder’s notice (including disclosure with respect to such stockholder and the nominee or proposed business, as applicable) and, in the case of nominations of candidates for election as directors, require a completed D&O questionnaire and nominee agreement from each such nominee. Any stockholder seeking to nominate candidates for election as directors must further deliver to us certain certifications and representations, as well as reasonable evidence that such stockholder has complied with the requirements of Rule 14a-19 of the Exchange Act not later than eight business prior to the annual meeting. Such proposed nominee may be required by us to deliver to us certain representations and agreements. We may also, as a condition to any such nomination or business being deemed properly brought before an annual meeting of stockholders, require such stockholder or any proposed nominee to deliver to the corporate secretary, within five business days of any such request, such other information as may reasonably be requested by us, including (i) such other information as may be reasonably required by our Board, in its sole discretion, to determine (A) the eligibility of such proposed nominee to serve as a director of the Company, and (B) whether such proposed nominee qualifies as an “independent director” or “audit committee financial expert” under applicable law, securities exchange rule or regulation, or any publicly disclosed corporate governance guideline or committee charter of the Company and (ii) such other information that our Board determines, in its sole discretion, could be material to a reasonable stockholder’s understanding of the independence, or lack thereof, of such proposed nominee.

A stockholder’s notice must be updated and supplemented, if necessary, so that the information provided or required to be provided in such notice is true and correct as of the record date for the annual meeting of stockholders and as of the date that is ten business days prior to the annual meeting of stockholders or any adjournment, recess, rescheduling or postponement thereof, and such update and supplement must be delivered to the corporate secretary not later than five business days after the record date for the annual meeting of stockholders in the case of the update and supplement required to be made as of the record date, and not later than eight business days prior to the date for the annual meeting of stockholders or any adjournment, recess, rescheduling or postponement thereof in the case of the update and supplement required to be made as of ten business days prior to the annual meeting of stockholders or any adjournment, recess, rescheduling or postponement thereof.

These provisions may impede stockholders’ ability to bring matters before an annual meeting of stockholders or make nominations for directors at an annual meeting of stockholders and may delay, deter or prevent tender offers or takeover attempts that stockholders may believe are in their best interests, including tender offers or attempts that might allow stockholders to receive premiums over the market price of their common stock.

Issuance of Preferred Stock

Our Board can at any time, under our Certificate of Incorporation, and without stockholder approval, issue one or more new series of preferred stock. In some cases, the issuance of preferred stock without stockholder approval could discourage or make more difficult attempts to take control of the Company through a merger, tender offer, proxy contest or otherwise. Preferred stock with special voting rights or other features issued to persons favoring our management could stop a takeover by preventing the person trying to take control of the Company from acquiring enough voting shares necessary to take control.

Special Meetings of Stockholders

Our Bylaws provide that a special meeting of stockholders may be called only by a majority of our Board.

Anti-Takeover Provisions of the Delaware General Corporation Law

As a Delaware corporation, we are subject to Section 203 of the DGCL. This provision provides that a corporation that is listed on a national securities exchange or that has more than 2,000 stockholders is not permitted to engage in a business combination with any interested stockholder, generally a person who owns 15% or more of the outstanding shares of a corporation’s voting stock, for three years after the person became an interested stockholder, unless:

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before the person became an interested stockholder, the board of directors approved either the transaction resulting in a person becoming an interested stockholder or the business combination;

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upon consummating the transaction which resulted in the person becoming an interested stockholder, the interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction commenced (excluding shares owned by persons who are both officers and directors of the corporation, and shares held by certain employee stock ownership plans); or

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on or after the date the person becomes an interested stockholder, the business combination is approved by the board of directors and at an annual or special meeting of stockholders by the affirmative vote of at least 66 2/3% of the corporation’s outstanding voting stock which is not owned by the interested stockholder.

Under Section 203, the restrictions described above also do not apply to specific business combinations proposed by an interested stockholder following the announcement or notification of designated extraordinary transactions involving the corporation and a person who had not been an interested stockholder during the previous three years or who became an interested stockholder with the approval of a majority of the corporation’s directors, if a majority of the directors who were directors prior to any person’s becoming an interested stockholder during the previous three years, or were recommended for election or elected to succeed those directors by a majority of those directors, approve or do not oppose that extraordinary transaction.

Warrants

As of May 10, 2023, we have outstanding warrants (the “Warrants”) exercisable for, in the aggregate, 1,185,836 shares of common stock at an exercise price of $27.1790 per share, in whole or in part, at any time on any business day and from time to time until 5:00 p.m., Central Time, on January 27, 2029 (the “Expiration Date”). The number of shares of common stock issuable in respect of the Warrants, and the exercise price, are subject to adjustment as a result of certain anti-dilution provisions contained in the Warrants. Unexercised Warrants will expire as of 5:00 p.m., Central Time, on the Expiration Date.

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is Equiniti Trust Company.

DESCRIPTION OF DEPOSITARY SHARES

We may issue preferred stock either separately or represented by depositary shares. We may also, at our option, issue fractional shares of preferred stock rather than full shares of preferred stock. If we exercise this option, we will issue receipts for depositary shares, and each of these depositary shares will represent a fraction (to be set forth in the prospectus supplement relating to such depositary shares) of a share of a particular series of preferred stock.

The shares of any series of preferred stock represented the depositary shares will be deposited under a deposit agreement between us and a bank or trust company selected by us. The depositary will have its principal office in the United States and a combined capital and surplus of at least $50,000,000. Subject to the terms of the deposit agreement, each owner of a depositary share will be entitled, in proportion to the applicable share or fraction thereof represented by the depositary share, to all of the rights and preferences of the preferred stock represented thereby. Those rights may include dividend, voting, redemption, conversion and liquidation rights. The depositary shares will be evidenced by depositary receipts issued under a deposit agreement.

We will describe the material terms of the deposit agreement, the depositary shares and the depositary receipts in a prospectus supplement relating to the depositary shares. You should also refer to the forms of the deposit agreement and depositary receipts that will be filed with the SEC in connection with the offering of the specific depositary shares.

DESCRIPTION OF WARRANTS

This section describes the general terms and provisions of the warrants. A prospectus supplement will describe the specific terms of the warrants offered through that prospectus supplement and any general terms outlined in this section that will not apply to those warrants.

We may issue warrants for the purchase of common stock, preferred stock or depositary shares. Warrants may be issued alone or together with common stock, preferred stock or depositary shares offered by any prospectus supplement and may be attached to or separate from those securities. Each series of warrants will be issued under a separate warrant agreement between us and a bank or trust company, as warrant agent, which will be described in the applicable prospectus supplement. The securities warrant agent will act solely as our agent in connection with the warrants and will not act as an agent or trustee for any holders of warrants.

We have summarized the material terms and provisions of the warrant agreements and warrants in this section. We will file the form of warrant agreement for common stock (including the form of warrant), the form of warrant agreement for preferred stock (including the form of warrant), the form of warrant agreement for depositary shares (including the form of warrant) with the SEC either as an exhibit to an amendment to the registration statement of which this prospectus is a part, or as an exhibit to a Current Report on Form 8-K. You should read the applicable forms of warrant agreement and warrant certificate for additional information before you buy any warrants.

General

If we offer warrants, the applicable prospectus supplement will identify the warrant agent and describe the terms of the warrants we offer, the warrant agreement relating to the warrants and the certificates representing the warrants, including the following:

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the title of the warrants;

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the aggregate number of warrants;

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the price or prices at which the warrants will be issued;

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the currency or currencies, including composite currencies or currency units, in which the price of the warrants may be payable if not payable in U.S. dollars;

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the designation, number or aggregate principal amount, currency of denomination and payment, and terms of the securities purchasable upon exercise of the warrants, and the procedures and conditions relating to the exercise of the warrants;

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if applicable, the designation and terms of any related securities with which the warrants are issued with the warrants and the number of warrants issued with each security;

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if applicable, the date on and after which the warrants and the related securities will be separately transferable;

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the principal amount of securities purchasable upon exercise of one warrant, and the price at and the currency in which the principal amount of such securities may be purchased upon such exercise;

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the date on which the right to exercise the warrants shall commence and the date on which the right to exercise shall expire;

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the maximum or minimum number of warrants that may be exercised at any time;

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if applicable, the United States federal income tax considerations;

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whether the warrants will be issued in registered or bearer form; and

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any other terms of the warrants.

You may, at the corporate trust offices of the warrant agent or any other office indicated in the applicable prospectus supplement:

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exchange warrant certificates for new warrant certificates of different denominations;

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if the warrant certificates are in registered form, present them for registration of transfer; and

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exercise warrant certificates.

Exercise of Warrants

Each warrant will entitle the holder of the warrant to purchase at the exercise price set forth in the applicable prospectus supplement the principal amount of common stock, preferred stock or depositary shares, or combination thereof, being offered. Holders may exercise warrants at any time up to the close of business on the expiration date set forth in the applicable prospectus supplement. After the close of business on the expiration date, unexercised warrants are void. Holders may exercise warrants as set forth in the prospectus supplement relating to the warrants being offered.

Until holders exercise their warrants to purchase our common stock, preferred stock, or depositary shares, or combination thereof, holders will not have any rights as a holder of our common stock, preferred stock or depositary shares, as the case may be, by virtue of their ownership of warrants.

DESCRIPTION OF PURCHASE CONTRACTS

The following is a general description of the terms of the purchase contracts we may issue from time to time. The applicable prospectus supplement will describe the terms of any purchase contracts and, if applicable, prepaid purchase contracts. The description in the prospectus supplement will be qualified in its entirety by reference to (1) the purchase contracts, (2) the collateral arrangements and depositary arrangements, if applicable, relating to such purchase contracts and (3) if applicable, the prepaid purchase contracts and the document pursuant to which such prepaid purchase contracts will be issued.

We may issue purchase contracts, including contracts obligating holders to purchase from us, and obligating us to sell to holders, a fixed or varying number of shares of common stock, preferred stock or depositary shares at a future date or dates. The consideration may be fixed at the time that the purchase contracts are issued or may be determined by reference to a specific formula set forth in the purchase contracts. Any purchase contract may include anti-dilution provisions to adjust the number of shares issuable pursuant to such purchase contract, as applicable, upon the occurrence of certain events.

DESCRIPTION OF UNITS

We may, from time to time, issue units comprised of one or more of the other securities described in this prospectus in any combination. A prospectus supplement will describe the specific terms of the units offered under that prospectus supplement, and any special considerations, including tax considerations, applicable to investing in those units. You must review the applicable prospectus supplement and any applicable unit agreement for a full understanding of the specific terms of any units. We will incorporate by reference into the registration statement of which this prospectus is a part the form of unit agreement, including a form of unit certificate, if any, that describes the terms of the series of units we are offering. While the terms we have summarized below will generally apply to any future units that we may offer under this prospectus, we will describe the particular terms of any series of units that we may offer in more detail in the applicable prospectus supplement and incorporated documents. The terms of any units offered under a prospectus supplement may differ from the terms described below.

General

Each unit will be issued so that the holder of the unit is also the holder of each security included in the unit. Thus, the holder of a unit will have the rights and obligations of a holder of each included security. The unit agreement under which a unit is issued may provide that the securities included in the unit may not be held or transferred separately, at any time, or at any time before a specified date.

As specified in the applicable prospectus supplement, we may issue units consisting of one or more of the other securities described in this prospectus in any combination. In addition, we will describe in the applicable prospectus supplement and any incorporated documents the terms of any series of units we issue, including the following:

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the designation and terms of the units and of the securities comprising the units, including whether and under what circumstances those securities may be held or transferred separately;

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whether we will apply to have the units traded on a securities exchange or securities quotation system;

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if applicable, any material United States federal income tax consequences;

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how, for United States federal income tax purposes, the purchase price paid for the units is to be allocated among the component securities;

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any provisions of the governing unit agreement that differ from those described below;

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any provisions for the issuance, payment, settlement, transfer, or exchange of the units or of the securities comprising the units; and

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any other information we think is important about the units.

The provisions described in this section, as well as those described under the other sections describing the securities offered by this prospectus, will apply to each unit and to any of such other securities included in each unit.

Issuance in Series

We may issue units in such amounts and in such numerous distinct series as we determine.

Enforceability of Rights by Holders of Units

Each unit agent will act solely as our agent under the applicable unit agreement and will not assume any obligation or relationship of agency or trust with any holder of any unit. A single bank or trust company may act

as unit agent for more than one series of units. A unit agent will have no duty or responsibility in case of any default by us under the applicable unit agreement or unit, including any duty or responsibility to initiate any proceedings at law or otherwise, or to make any demand upon us. Any holder of a unit, without the consent of the related unit agent or the holder of any other unit, may enforce by appropriate legal action its rights as holder under any security included in the unit.

Title

We, the unit agent, and any of their agents may treat the registered holder of any unit certificate as an absolute owner of the units evidenced by that certificate for any purposes and as the person entitled to exercise the rights attaching to the units so requested, despite any notice to the contrary.

PLAN OF DISTRIBUTION

General

We may sell the applicable securities offered by this prospectus from time to time in one or more transactions, including without limitation:

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directly to one or more purchasers;

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through agents;

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to or through underwriters, brokers or dealers; and

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through a combination of any of these methods.

A distribution of the securities offered by this prospectus may also be effected through the issuance of derivative securities, including without limitation, warrants, subscriptions, exchangeable securities, forward delivery contracts and the writing of options.

In addition, the manner in which we may sell some or all of the securities covered by this prospectus, include, without limitation, through:

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a block trade in which a broker-dealer will attempt to sell as agent, but may position or resell a portion of the block, as principal, in order to facilitate the transaction;

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purchases by a broker-dealer, as principal, and resale by the broker-dealer for its account;

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ordinary brokerage transactions and transactions in which a broker solicits purchasers;

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privately negotiated transactions;

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settlement of short sales;

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transactions through broker-dealers to sell a specified number of such securities at a stipulated price per security;

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an exchange distribution in accordance with the rules of the applicable exchange; or

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a combination of any such methods of sale.

We may also enter into hedging transactions. For example, we may:

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enter into transactions with a broker-dealer or affiliate thereof in connection with which such broker-dealer or affiliate will engage in short sales of the common stock pursuant to this prospectus, in which case such broker-dealer or affiliate may use shares of common stock received from us to close out its short positions;

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sell securities short and redeliver such shares to close out our short positions;

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enter into option or other types of transactions that require us to deliver common stock to a broker-dealer or an affiliate thereof, who will then resell or transfer the common stock under this prospectus; or

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loan or pledge the common stock to a broker-dealer or an affiliate thereof, who may sell the loaned shares or, in an event of default in the case of a pledge, sell the pledged shares pursuant to this prospectus.

In addition, we may enter into derivative or hedging transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. In connection with such a transaction, the third parties may sell the applicable securities covered by and pursuant to this prospectus and an

applicable prospectus supplement. If so, the third party may use securities borrowed from us or others to settle such sales and may use securities received from us to close out any related short positions. We may also loan or pledge securities covered by this prospectus and an applicable prospectus supplement to third parties, who may sell the loaned securities or, in an event of default in the case of a pledge, sell the pledged securities pursuant to this prospectus and the applicable prospectus supplement.

A prospectus supplement with respect to each offering of securities will state the terms of the offering of the securities, including:

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the name or names of any underwriters or agents and the amounts of securities underwritten or purchased by each of them if any;

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the public offering price or purchase price of the securities and the net proceeds to be received by us from the sale;

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any delayed delivery arrangements;

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any underwriting discounts or agency fees and other items constituting underwriters’ or agents’ compensation;

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any discounts or concessions allowed or reallowed or paid to dealers; and

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any securities exchange or markets on which the securities may be listed.

The offer and sale of the securities described in this prospectus by us, the underwriters or the third parties described above may be effected from time to time in one or more transactions, including privately negotiated transactions, either:

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at a fixed price or prices, which may be changed;

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at market prices prevailing at the time of sale;

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at prices related to the prevailing market prices; or

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at negotiated prices.

We will bear costs relating to all of the securities being registered under the registration statement of which this prospectus forms a part.

To the extent required, this prospectus may be amended or supplemented from time to time to describe a specific plan of distribution.

Underwriting Compensation

Any public offering price and any fees, discounts, commissions, concessions or other items constituting compensation allowed or reallowed or paid to underwriters, dealers or agents may be changed from time to time. Underwriters, dealers and agents and remarketing firms that participate in the distribution of the offered securities may be “underwriters” as defined in the Securities Act. Any discounts or commissions they receive from us and any profits they receive on the resale of the offered securities may be treated as underwriting discounts and commissions under the Securities Act. We will identify any underwriters, agents or dealers and describe their fees, commissions or discounts in the applicable prospectus supplement.

Underwriters and Agents

If underwriters are used in a sale, they will acquire the offered securities for their own account. The underwriters may resell the offered securities in one or more transactions, including negotiated transactions. These sales may be made at a fixed public offering price or prices, which may be changed, at market prices

prevailing at the time of the sale, at prices related to such prevailing market price or at negotiated prices. We may offer the securities to the public either through an underwriting syndicate represented by one or more managing underwriters or through one or more underwriter(s). The underwriters in any particular offering will be identified in the applicable prospectus supplement.

Unless otherwise specified in connection with any particular offering of securities, the obligations of the underwriters to purchase the offered securities will be subject to certain conditions contained in an underwriting agreement that we will enter into with the underwriters at the time of the sale to them. The underwriters will be obligated to purchase all of the securities of the series offered if any of the securities are purchased, unless otherwise specified in connection with any particular offering of securities. Any initial offering price and any discounts or concessions allowed, reallowed or paid to dealers may be changed from time to time.

Securities may be sold directly by us or through agents designated by us from time to time. Any agent involved in the offer or sale of the securities in respect of which this prospectus and a prospectus supplement is delivered will be named, and any commissions payable by us to such agent will be set forth, in the prospectus supplement. Unless otherwise indicated in the prospectus supplement, any such agent will be acting on a best efforts basis for the period of its appointment.

In connection with offerings made through underwriters or agents, we may enter into agreements with such underwriters or agents pursuant to which we receive our outstanding securities in consideration for the securities being offered to the public for cash. In connection with these arrangements, the underwriters or agents may also sell securities covered by this prospectus to hedge their positions in these outstanding securities, including in short sale transactions. If so, the underwriters or agents may use the securities received from us under these arrangements to close out any related open borrowings of securities.

Dealers

We may sell the offered securities to dealers as principals. We may negotiate and pay dealers’ commissions, discounts or concessions for their services. The dealer may then resell such securities to the public either at varying prices to be determined by the dealer or at a fixed offering price agreed to with us at the time of resale. Dealers engaged by us may allow other dealers to participate in resales.

Direct Sales

We may choose to sell the offered securities directly to multiple purchasers or a single purchaser. In this case, no underwriters or agents would be involved.

At-the-Market Offerings

We may also sell the securities offered by any applicable prospectus supplement in “at-the-market offerings” within the meaning of Rule 415 of the Securities Act, to or through a market maker or into an existing trading market, on an exchange or otherwise.

Institutional Purchasers

We may authorize agents, dealers or underwriters to solicit certain institutional investors to purchase offered securities on a delayed delivery basis pursuant to delayed delivery contracts providing for payment and delivery on a specified future date. The applicable prospectus supplement will provide the details of any such arrangement, including the offering price and commissions payable on the solicitations.

We will enter into such delayed contracts only with institutional purchasers that we approve. These institutions may include commercial and savings banks, insurance companies, pension funds, investment companies and educational and charitable institutions.

Indemnification; Other Relationships

We may agree to indemnify underwriters, dealers and agents against certain civil liabilities, including liabilities under the Securities Act and to make contribution to them in connection with those liabilities. Underwriters, dealers and agents, and their affiliates, may engage in transactions with, or perform services for us, and our affiliates, in the ordinary course of business, including commercial banking transactions and services.

Market Making, Stabilization and Other Transactions

Each series of securities will be a new issue of securities and will have no established trading market other than the common stock which is listed on the NYSE. If the offered securities are traded after their initial issuance, they may trade at a discount from their initial offering price, depending upon prevailing interest rates, the market for similar securities and other factors. While it is possible that an underwriter could inform us that it intends to make a market in the offered securities, such underwriter would not be obligated to do so, and any such market-making could be discontinued at any time without notice. Therefore, no assurance can be given as to whether an active trading market will develop for the offered securities. We have no current plans for listing of the preferred stock on any securities exchange or quotation system; any such listing with respect to any preferred stock will be described in the applicable prospectus supplement.

In connection with any offering of common stock, preferred stock or securities that provide for the issuance of shares of our common stock upon conversion, exchange or exercise, as the case may be, the underwriters may purchase and sell shares of our common stock or preferred stock in the open market. These transactions may include short sales, syndicate covering transactions and stabilizing transactions. Short sales involve syndicate sales of common stock in excess of the number of shares to be purchased by the underwriters in the offering, which creates a syndicate short position. “Covered” short sales are sales of shares made in an amount up to the number of shares represented by the underwriters’ over-allotment option. In determining the source of shares to close out the covered syndicate short position, the underwriters will consider, among other things, the price of shares available for purchase in the open market as compared to the price at which they may purchase shares through the over-allotment option. Transactions to close out the covered syndicate short involve either purchases of the common stock in the open market after the distribution has been completed or the exercise of the over-allotment option. The underwriters may also make “naked” short sales of shares in excess of the over-allotment option. The underwriters must close out any naked short position by purchasing shares of common stock in the open market. A naked short position is more likely to be created if the underwriters are concerned that there may be downward pressure on the price of the shares in the open market after pricing that could adversely affect investors who purchase in the offering. Stabilizing transactions consist of bids for or purchases of shares in the open market while the offering is in progress for the purpose of pegging, fixing or maintaining the price of the securities.

In connection with any offering, the underwriters may also engage in penalty bids. Penalty bids permit the underwriters to reclaim a selling concession from a syndicate member when the securities originally sold by the syndicate member are purchased in a syndicate covering transaction to cover syndicate short positions. Stabilizing transactions, syndicate covering transactions and penalty bids may cause the price of the securities to be higher than it would be in the absence of the transactions. The underwriters may, if they commence these transactions, discontinue them at any time.

LEGAL MATTERS

The validity of the securities and certain other matters will be passed upon for us by Kirkland & Ellis LLP, Houston, Texas. Certain legal matters will passed upon for any underwriters, dealers or agents by the law firm identified as counsel to such underwriters, dealers or agents in the applicable prospectus supplement.

EXPERTS

The financial statements of Northern Oil and Gas, Inc. incorporated by reference in this prospectus, and the effectiveness of Northern Oil and Gas, Inc.’s internal control over financial reporting have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their reports. Such financial statements are incorporated by reference in reliance upon the reports of such firm, given their authority as experts in accounting and auditing.

Certain estimates of our oil and natural gas reserves and related information included or incorporated by reference in this prospectus have been derived from the reports prepared by Cawley, Gillespie & Associates, Inc. All such information has been so included or incorporated by reference on the authority of such firm as an expert regarding the matters contained in its reports.

Certain estimates of oil and natural gas reserves for Midland-Petro D.C. Partners, LLC and Collegiate Midstream LLC included or incorporated by reference in this prospectus have been derived from the report prepared by Cawley, Gillespie & Associates, Inc. All such information has been so included or incorporated by reference on the authority of such firm as an expert regarding the matters contained in its reports.

LOGO

$200,000,000

Northern Oil and Gas, Inc.

Common Stock

PROSPECTUS SUPPLEMENT

BofA Securities

, 2026

SEC Form 424B5 filed by Northern Oil and Gas Inc.