SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 6)

Tamboran Resources Corporation

(Name of Issuer)

Common Stock, par value $0.001 per share

(Title of Class of Securities)

87507T101

(CUSIP Number)

Bryan Sheffield
300 Colorado Street, Suite 1900
Austin, TX, 78701
737-304-7803

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

04/14/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. Checkbox not checked

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

SCHEDULE 13D

CUSIP Number(s):

87507T101

Name of reporting person

Bryan Sheffield

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 183,655.00
8	Shared Voting Power 3,123,601.00
9	Sole Dispositive Power 183,655.00
10	Shared Dispositive Power 3,123,601.00

Aggregate amount beneficially owned by each reporting person

3,307,256.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

11.9 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP Number(s):

87507T101

Name of reporting person

Sheffield Holdings, LP

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

TEXAS

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 2,247,404.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 2,247,404.00

Aggregate amount beneficially owned by each reporting person

2,247,404.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

8.1 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP Number(s):

87507T101

Name of reporting person

Spraberry Interests, LLC

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 2,247,404.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 2,247,404.00

Aggregate amount beneficially owned by each reporting person

2,247,404.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

8.1 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP Number(s):

87507T101

Name of reporting person

Daly Waters Energy, LP

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 876,197.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 876,197.00

Aggregate amount beneficially owned by each reporting person

876,197.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

3.1 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP Number(s):

87507T101

Name of reporting person

Formentera Australia Fund I GP, LP

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 876,197.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 876,197.00

Aggregate amount beneficially owned by each reporting person

876,197.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

3.1 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP Number(s):

87507T101

Name of reporting person

Formentera Investments LLC

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 876,197.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 876,197.00

Aggregate amount beneficially owned by each reporting person

876,197.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

3.1 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

Item 1.

Security and Issuer

(a)

Title of Class of Securities:

Common Stock, par value $0.001 per share

(b)

Name of Issuer:

Tamboran Resources Corporation

(c)

Address of Issuer's Principal Executive Offices:

Suite 01, Level 39, Tower One, I.T.S., 100 Barangaroo Avenue, New South Wales, AUSTRALIA , 2000.

Item 1 Comment:

This Amendment No. 6 ("Amendment No. 6") amends and supplements the statement on Schedule 13D filed by the undersigned on July 8, 2024 (the "Original Schedule 13D"), as amended by Amendment No. 1 filed on May 14, 2025 ("Amendment No. 1"), Amendment No. 2 filed on July 23, 2025 ("Amendment No. 2"), Amendment No. 3 filed on July 29, 2025 ("Amendment No. 3"), Amendment No. 4 filed on November 17, 2025 ("Amendment No. 4"), and Amendment No. 5 filed on February 13, 2026 ("Amendment No. 5", together with the Original Schedule 13D, Amendment No. 1, Amendment No. 2, Amendment No. 3, and Amendment No. 4, the "Schedule 13D") as specifically set forth herein. Amendment No. 6 is filed by (i) Bryan Sheffield, (ii) Sheffield Holdings, LP, a Texas limited partnership ("Sheffield Holdings"), (iii) Spraberry Interests, LLC, a Delaware limited liability company ("Spraberry"), (iv) Daly Waters Energy, LP, a Delaware limited partnership ("Daly Waters"), (v) Formentera Australia Fund I GP, LP, a Delaware limited partnership ("Formentera Australia"), and (vi) Formentera Investments LLC, a Delaware limited liability company ("Formentera Investments"), (each, a "Reporting Person" and, collectively, the "Reporting Persons"), relating to the shares of the common stock, par value $0.001 per share (the "Common Stock"), of Tamboran Resources Corporation, a Delaware corporation (the "Issuer"). Capitalized terms used herein and not otherwise defined in this Amendment No. 6 have the meanings set forth in the Schedule 13D.

Item 5.

Interest in Securities of the Issuer

(a)

Item 5 of the Schedule 13D is hereby amended and restated in its entirety as follows: The information set forth in Item 11 and Item 13 on each of the cover pages of this Amendment No. 6 are incorporated by reference into this Item 5(a). Sheffield Holdings is the record holder of 2,247,404 shares of Common Stock. Spraberry is the general partner of Sheffield Holdings. Bryan Sheffield is the manager of Spraberry. As a result, each of Mr. Sheffield and Spraberry may be deemed to share beneficial ownership of the shares held directly by Sheffield Holdings. In addition to the shares held by Sheffield Holdings, Mr. Sheffield, as investment trustee, may be deemed to beneficially own shares held by the Bryan S. Sheffield Spousal Lifetime Access Trust ("BSS SLAT"). In this regard, after giving effect to closing of the Institutional Entitlement Offer (as defined below), BSS SLAT is the record holder of 183,655 shares of Common Stock. Daly Waters is the record holder of 876,197 shares of Common Stock. Formentera Australia is the general partner of Daly Waters. Formentera Investments is the general partner of Formentera Australia. Bryan Sheffield is the managing member of Formentera Investments. As a result, each of Mr. Bryan Sheffield, Formentera Australia and Formentera Investments may be deemed to share beneficial ownership of the shares held directly by Daly Waters.

(b)

The information set forth in Items 7-10 on each of the cover pages of this Amendment No. 6 are incorporated by reference into this Item 5(b). References herein to percentage ownerships of Common Stock are based on 22,667,289 shares of Common Stock of the Issuer issued and outstanding as of March 31, 2026, as set forth in the Issuer's Prospectus Supplement to the Prospectus dated April 7, 2026, which was filed with the Commission on April 7, 2026, after giving effect to the issuance of (i) 3,400,093 shares of Common Stock offered pursuant to such prospectus supplement (including the underwriters' option to purchase additional shares), (ii) 741,542 shares underlying 148,308,400 CHESS Depositary Interests ("CDIs") (each CDI represents 1/200th of a share of Common Stock) pursuant to an accelerated non-renounceable institutional entitlement offer to eligible non-U.S. securityholders, and (iii) 1,013,110 shares of Common Stock pursuant to the Institutional Entitlement Offer, in each case as set forth in the Issuer's Current Report on Form 8-K filed with the Commission on April 14, 2026.

(c)

Except as otherwise disclosed in this Amendment No. 6, the Reporting Persons have effected no transactions in Common Stock within the prior 60 days.

(d)

None

(e)

N/A

Item 6.

Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer

Item 6 of the Schedule 13D is hereby amended to add the following: On April 8, 2026, BSS SLAT entered into a share purchase agreement (the "Share Purchase Agreement") in connection with a registered direct institutional entitlement offer (the "Institutional Entitlement Offer") of shares of common stock to eligible institutional holders pursuant to the registration statement on Form S-3 filed by Tamboran Resources Corporation with the U.S. Securities and Exchange Commission on April 7, 2026, pursuant to which, BSS SLAT agreed to purchase from the Issuer and the Issuer agreed to sell to BSS SLAT 50,000 shares of Common Stock (the Purchase Shares") at a price of $35 per share. The Institutional Entitlement Offer was subject to certain customary closing conditions. The closing conditions were satisfied and the Institutional Entitlement Offer closed on April 14, 2026. The Purchase Shares represent less than 1% of the Issuer's outstanding shares of Common Stock. The foregoing summary of the BSS SLAT Subscription Agreement does not purport to be complete and is qualified in its entirety by the full text of the BSS SLAT Share Purchase Agreement Agreement, the form of which is filed as Exhibit 5 hereto and is incorporated by reference herein.

Item 7.

Material to be Filed as Exhibits.

Item 7 is hereby amended to add the following exhibit: Exhibit 5 - Share Purchase Agreement

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Bryan Sheffield

Signature:	/s/ Bryan Sheffield
Name/Title:	Bryan Sheffield
Date:	04/16/2026

Sheffield Holdings, LP

Signature:	/s/ Bryan Sheffield
Name/Title:	Bryan Sheffield / Manager
Date:	04/16/2026

Spraberry Interests, LLC

Signature:	/s/ Bryan Sheffield
Name/Title:	Bryan Sheffield / Manager
Date:	04/16/2026

Daly Waters Energy, LP

Signature:	/s/ Bryan Sheffield
Name/Title:	Bryan Sheffield / Managing Member
Date:	04/16/2026

Formentera Australia Fund I GP, LP

Signature:	/s/ Bryan Sheffield
Name/Title:	Bryan Sheffield / Managing Member
Date:	04/16/2026

Formentera Investments LLC

Signature:	/s/ Bryan Sheffield
Name/Title:	Bryan Sheffield / Managing Member
Date:	04/16/2026

Comments accompanying signature:

Sheffield Holdings, LP By: Spraberry Interests, LLC, its general partner Daly Waters Energy, LP By: Formentera Australia Fund I GP, LP, its general partner By: Formentera Investments LLC, its general partner Formentera Australia Fund I GP, LP By: Formentera Investments LLC, its general partner

Amendment: SEC Form SCHEDULE 13D/A filed by Tamboran Resources Corporation