424B3 1 ea028400102-424b3_sunpower.htm PROSPECTUS SUPPLEMENT

PROSPECTUS SUPPLEMENT NO. 2	Filed Pursuant to Rule 424(b)(3)
(To the Prospectus dated February 10, 2026)	Registration No. 333-293156

SUNPOWER INC.

Up to 14,625,610 Shares of Common Stock

Up to 50,760,218 Shares of Common Stock Issuable Upon Conversion of Convertible Notes

This prospectus supplement supplements the prospectus dated February 10, 2026 (as amended or supplemented, the “prospectus”), which forms a part of our registration statement on Form S-1 (No. 333-293156). This prospectus supplement is being filed to update and supplement the information in the prospectus with the information contained in our Current Report on Form 8-K filed with the Securities and Exchange Commission on March 30, 2026 (the “Current Report”). Accordingly, we have attached the Current Report to this prospectus supplement.

The prospectus and this prospectus supplement relate to the offer and sale from time to time by the selling securityholders named in the prospectus, or any applicable prospectus supplement, or their permitted transferees (the “Selling Securityholders”) of up to 65,385,828 shares of our common stock, par value $0.0001 per share (the “common stock”), consisting of (i) 10,243,924 shares of common stock (the “Ambia Shares”) previously issued by us pursuant to a Membership Interest Purchase Agreement (the “Ambia Purchase Agreement”), dated November 21, 2025, between the Company, Ambia Energy, LLC (“Ambia”) and Ambia Holdings, Inc., in connection with our acquisition of Ambia, (ii) 3,333,334 shares of common stock (the “Sunder Shares” and, collectively with the Ambia Shares, the “Acquisition Shares”) previously issued by us pursuant to a Membership Interest Purchase Agreement (the “Sunder Purchase Agreement” and, together with the Ambia Purchase Agreement, the “Acquisition Agreements”), dated September 21, 2025, by and among the Company, Complete Solar, Inc., Sunder Energy LLC (“Sunder”) and Chicken Parm Pizza LLC, in connection with our acquisition of Sunder, (iii) up to 50,760,218 shares of common stock (the “Conversion Shares”) issuable upon conversion of our 7% convertible senior notes due 2029 (the “7% Notes”), and (iv) 1,048,352 shares of common stock held by certain of our former affiliates (the “Former Affiliate Shares” and, collectively with the Acquisition Shares and the Conversion Shares, the “Offered Securities”). The Acquisition Shares were issued at the closing of the transactions contemplated by the Transaction Agreements on November 21, 2025, with respect to the acquisition of Ambia, and on September 24, 2025, with respect to the acquisition of Sunder. The 7% Notes were issued in multiple tranches in September 2024, December 2024, in the thirteen week period ended March 30, 2025, and on September 23, 2025. The Former Affiliate Shares were issued previously to former affiliates of Freedom Acquisition I Corp. and its sponsor, Freedom Acquisition I, LLC.

See “Prospectus Summary” in the prospectus for a description of the Acquisition Agreements, the Ambia Acquisition and the Sunder Acquisition and the 7% Notes and “Selling Securityholders” for additional information regarding the Selling Securityholders.

We are not selling any securities under the prospectus or any prospectus supplement and will not receive any of the proceeds from the sale of shares of common stock by the Selling Securityholders.

The Selling Securityholders may sell or otherwise dispose of the shares of common stock described in the prospectus or any applicable prospectus supplement in a number of different ways and at varying prices. See “Plan of Distribution” for more information about how the Selling Securityholders may sell or otherwise dispose of the shares of common stock being registered pursuant to the prospectus. None of the Selling Securityholders are an “underwriter” with respect to the securities registered hereunder within the meaning of Section 2(a)(11) of the Securities Act of 1933, as amended.

The Selling Securityholders will pay all brokerage fees and commissions and similar expenses attributable to the sales of its common stock. We will pay the expenses (except brokerage fees and commissions and similar expenses) incurred in registering the shares of common stock offered hereby, including legal and accounting fees. See “Plan of Distribution.”

Shares of our common stock are listed on the Nasdaq Global Market (“Nasdaq”) under the symbol “SPWR”. On March 30, 2026, the closing price of our common stock was $1.22.

This prospectus supplement should be read in conjunction with the prospectus, including any amendments or supplements thereto, which is to be delivered with this prospectus supplement. This prospectus supplement is qualified by reference to the prospectus, including any amendments or supplements thereto, except to the extent that the information in this prospectus supplement updates and supersedes the information contained therein.

This prospectus supplement is not complete without, and may not be delivered or utilized except in connection with, the prospectus, including any amendments or supplements thereto.

We are an “emerging growth company” as defined under U.S. federal securities laws and, as such, have elected to comply with reduced public company reporting requirements. The prospectus and this prospectus supplement comply with the requirements that apply to an issuer that is an emerging growth company.

Investing in our securities involves a high degree of risk. You should review carefully the risks and uncertainties described in the section titled “Risk Factors” beginning on page 9 of the prospectus, and under similar headings in any amendments or supplements to the prospectus.

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

Prospectus dated March 31, 2026

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): March 25, 2026

SunPower Inc.

(Exact name of registrant as specified in its charter)

Delaware		001-40117		93-2279786
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification No.)

45700 Northport Loop East, Fremont, CA		94538
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code: (510) 270-2507

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.0001 per share	SPWR	The Nasdaq Global Market

Warrants, each whole warrant exercisable for one share of Common Stock at an exercise price of $11.50 per share	SPWRW	The Nasdaq Capital Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☒

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

Approval of Second Amendment to 2023 Equity Incentive Plan

On March 25, 2026, SunPower Inc. (the “Company”) held a Special Meeting of Stockholders (the “Special Meeting”). At the Special Meeting, the Company’s stockholders approved the Second Amendment (the “Second Amendment”) to the Company’s 2023 Equity Incentive Plan, as amended (as amended, the “2023 Plan”). The Second Amendment increases the total number of shares of common stock of the Company, $0.0001 par value per share (the “Common Stock”), reserved for issuance under the 2023 Plan to 44,573,109 shares of Common Stock.

The foregoing description of the Second Amendment is qualified in its entirety by reference to the Second Amendment, filed as Exhibit 10.1 hereto.

Item 5.07 Submission of Matters to a Vote of Security Holders.

The Company held the Special Meeting on March 25, 2026. Set forth below are the final results of the voting with respect to each matter acted upon at the Special Meeting. The related proposals are described in further detail in the Company’s definitive proxy statement filed with the U.S. Securities and Exchange Commission on February 20, 2026 (the “Proxy Statement”).

Proposal 1 - To approve, for purposes of complying with Nasdaq Listing Rule 5635(a), the issuance of shares of Common Stock as additional consideration pursuant to the Membership Interest Purchase Agreement, dated as of September 21, 2025, by and among SunPower Inc., Complete Solar, Inc., Chicken Parm Pizza LLC and Sunder Energy LLC in excess of 3,333,334 shares of Common Stock

The Company’s stockholders approved Proposal 1.

VOTES FOR		VOTES AGAINST		WITHHOLD/ ABSTAIN		BROKER NON-VOTES
74,998,001		264,302		45,127		—

Proposal 2 – To approve, for purposes of complying with Nasdaq Listing Rule 5635(a), the issuance of shares of Common Stock that may be issuable upon the conversion of an additional $22,225,000 aggregate principal amount of the Company’s 7.00% Convertible Senior Notes due 2029 (the “7.00% Notes” and such additional $22,225,000 aggregate principal amount of 7.00% Notes, the “Additional 7.0% Notes”), which Additional 7.0% Notes may become issuable by the Company following the exercise of an additional purchase option for the Additional 7.0% Notes pursuant to the various Note Purchase Agreements, dated as of September 21, 2025, between the Company and the purchasers party thereto

The Company’s stockholders approved Proposal 2.

VOTES FOR		VOTES AGAINST		WITHHOLD/ ABSTAIN		BROKER NON-VOTES
74,979,796		277,299		50,335		—

Proposal 3 – To approve, for purposes of complying with Nasdaq Listing Rule 5635(a), the issuance of shares of Common Stock as post-closing consideration pursuant to the Membership Interest Purchase Agreement, dated as of November 21, 2025, by and among SunPower Inc., Ambia Holdings, Inc. and Ambia Energy, LLC in excess of 16,620,910 shares of Common Stock

The Company’s stockholders approved Proposal 3.

VOTES FOR		VOTES AGAINST		ABSTAIN		BROKER NON-VOTES
72,197,199		3,050,751		59,480		—

Proposal 4 – To approve, for purposes of complying with Nasdaq Listing Rule 5635(d), the increase of the aggregate commitment amount under the Amended White Lion Purchase Agreement (as defined in the Proxy Statement) from $30.0 million to $55.0 million shares of Common Stock

The Company’s stockholders approved Proposal 4,

VOTES FOR		VOTES AGAINST		ABSTAIN		BROKER NON-VOTES
74,368,503		879,458		59,469		—

Proposal 5 – To approve, for purposes of complying with Nasdaq Listing Rule 5635(d), the issuance of shares of Common Stock (a) pursuant to the Standby Equity Purchase Agreement, dated January 27, 2026 between YA II PN, Ltd. (“Yorkville”), and SunPower Inc. (the “Yorkville Purchase Agreement”) and (b) upon the conversion of convertible promissory notes issued to Yorkville in connection with the Yorkville Purchase Agreement, in an amount that may be equal to or exceed 20% of the Common Stock outstanding as of January 27, 2026

The Company’s stockholders approved Proposal 5.

VOTES FOR		VOTES AGAINST		ABSTAIN		BROKER NON-VOTES
74,010,772		1,250,720		45,938		—

Proposal 6 – To approve an amendment to the Company’s 2023 Equity Incentive Plan, as amended, to reserve an additional 8,000,000 shares of Common Stock for issuance under the 2023 Equity Incentive Plan, as amended

The Company’s stockholders approved Proposal 6.

VOTES FOR		VOTES AGAINST		ABSTAIN		BROKER NON-VOTES
66,817,445		8,440,188		49,797		—

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number		Description
10.1		Second Amendment to 2023 Equity Incentive Plan, as amended
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	SunPower Inc.

Dated: March 30, 2026	By:	/s/ Wendell Laidley
		Wendell Laidley
		Chief Financial Officer

Exhibit 10.1

Second Amendment

to SunPower Inc.

2023 Equity Incentive Plan, As Previously Amended

This Second Amendment (the “Amendment”) to the SunPower Inc. 2023 Equity Incentive Plan, as previously amended (the “Plan”), is made by SunPower Inc., a Delaware corporation (the “Company”), effective as of the date of its approval by the stockholders of the Company at the Company’s 2026 Special Meeting of Stockholders.

This Amendment was approved by the Company’s Board of Directors on February 10, 2026.

1. Amendments.

a. Section 2(a) of the Plan is hereby amended and restated in its entirety to read as follows:

“(a) Shares Reserve. Subject to adjustment in accordance with Section 2(c) and any adjustments as necessary to implement any Capitalization Adjustments, the aggregate number of shares of Common Stock that may be issued pursuant to Awards will not exceed 44,573,109 shares of Common Stock (which number of shares of Common stock includes additional shares of Common Stock available for issuance as a result of automatic increases thereto through and including January 1, 2026, as contemplated by the next sentence). In addition, subject to any adjustments as necessary to implement any Capitalization Adjustments, such aggregate number of shares of Common Stock will automatically increase on January 1 of each year for a period of ten years commencing on January 1, 2024 and ending on (and including) January 1, 2033, in an amount equal to 4% of the total number of shares of Common Stock outstanding on December 31 of the preceding year; provided, however, that the Board may act prior to January 1st of a given year to provide that the increase for such year will be a lesser number of shares of Common Stock.”

b. Section 2(b) of the Plan is hereby amended and restated in its entirety to read as follows:

“(b) Aggregate Incentive Stock Option Limit. Notwithstanding anything to the contrary in Section 2(a) and subject to any adjustments as necessary to implement any Capitalization Adjustments, the aggregate maximum number of shares of Common Stock that may be issued pursuant to the exercise of Incentive Stock Options is 44,573,109 shares.”

2. Continued Effect. Except as set forth herein, the Plan shall remain unchanged and in full force and effect, and the forms of stock option award agreements, restricted stock units award agreements and any outstanding award agreements under the Plan shall effectively adopt the amendments herein, as applicable.

SEC Form 424B3 filed by SunPower Inc.