Filed Pursuant to Rule 424(b)(3)

Registration No. 333-268478

PROSPECTUS SUPPLEMENT NO. 1

(To the Prospectus dated April 3, 2023)

Granite Ridge Resources, Inc.

123,671,585 Shares of Common Stock
10,349,975 Shares of Common Stock issuable
upon the exercise of Warrants

This prospectus supplement supplements the prospectus, dated April 3, 2023 (as supplemented or amended, the “Prospectus”) of Granite Ridge Resources, Inc. (the “Company” or “Granite Ridge”), which forms a part of our registration statement on Form S-1 (No. 333-268478). 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 May 19, 2023. Accordingly, we have attached the Current Report to this prospectus supplement.

The Prospectus and this prospectus supplement relate to (i) the issuance by us of up to an aggregate of 10,349,975 shares of common stock, $0.0001 par value (the “Granite Ridge common stock”) that may be issued upon exercise of warrants to purchase Granite Ridge common stock at an exercise price of $11.50 per share (the “Granite Ridge warrants”) and (ii) the offer and sale from time to time by the selling securityholders named in the Prospectus (the “Selling Securityholders”), or their permitted transferees, of up to 123,671,585 shares of Granite Ridge common stock

Granite Ridge common stock and Granite Ridge warrants are listed on the New York Stock Exchange under the symbols “GRNT” and “GRNT WS,” respectively. On May 18, 2023, the closing price of Granite Ridge common stock was $6.00 per share and the closing price of Granite Ridge warrants on May 18, 2023 was $0.6198 per warrant.

This prospectus supplement should be read in conjunction with the Prospectus and is not complete without, and may not be delivered or utilized except in connection with, the Prospectus, including any amendments or supplements thereto. 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. If there is any inconsistency between the information in the Prospectus and this prospectus supplement, you should rely on the information in this prospectus supplement.

We are an “emerging growth company” and a “smaller reporting company” as those terms are defined under applicable federal securities laws, and as such, are subject to certain reduced public company reporting requirements.

Investing in our securities involves a high degree of risk. Before buying any securities, you should carefully read the discussion of the risks of investing in our securities in “Risk Factors” beginning on page 10 of the Prospectus.

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

Prospectus Supplement dated May 19, 2023.

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): May 19, 2023

Granite Ridge Resources, Inc.

(Exact name of registrant as specified in its charter)

(214) 396-2850

(Registrant’s telephone number, including area code)

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 obligation of the registrant under any of the following provisions:

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

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 x

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. ¨

On May 19, 2023, Granite Ridge Resources, Inc., (“Granite Ridge” or the “Company”), announced the commencement of an exchange offer (the “Offer”) and consent solicitation (the “Consent Solicitation”) relating to its outstanding warrants to purchase shares of common stock of the Company, par value $0.0001 per share (the “Common Stock”), which warrants trade on the New York Stock Exchange under the symbol “GRNT.WS” (the “Warrants”). The Company is offering to all holders of the Warrants the opportunity to receive 0.250 shares of Common Stock in exchange for each outstanding Warrant tendered by the holder and exchanged pursuant to the Offer. Concurrently with the Offer, the Company is also soliciting consents from holders of the Warrants to amend that certain Warrant Agreement, dated as of September 15, 2020, by and between Executive Network Partnering Corporation, a Delaware corporation (“ENPC”), and Continental Stock Transfer & Trust Company, as warrant agent (“Continental”), as amended on March 24, 2021, by and between ENPC and Continental, and as assigned pursuant to the Assignment, Assumption and Amendment Agreement, dated as of October 24, 2022, by and between Granite Ridge, ENPC and Continental (as amended and assigned, the “Warrant Agreement”) to permit the Company to require that each Warrant that is outstanding upon the closing of the Offer be exchanged for 0.225 shares of Common Stock, which is a ratio 10% less than the exchange ratio applicable to the Offer (such amendment, the “Warrant Amendment”).

The Offer and Consent Solicitation are being made pursuant to a prospectus/offer to exchange, dated May 19, 2023 (the “Prospectus/Offer to Exchange”), and Schedule TO, dated May 19, 2023 (the “Schedule TO”). The Offer and Consent Solicitation will expire at 11:59 p.m., Eastern Time, on June 16, 2023, or such later time and date to which the Company may extend. Pursuant to the terms of the Warrant Agreement, all except certain specified modifications or amendments require the vote or written consent of holders of at least 50% of the outstanding Warrants. Parties representing approximately 51.3% of the outstanding Warrants have agreed to tender their Warrants in the Offer and to consent to the Warrant Amendment in the Consent Solicitation, pursuant to a tender and support agreement. Accordingly, because the holders of more than 50% of our outstanding Warrants have agreed to consent to the Warrant Amendment in the Consent Solicitation, if the other conditions described in the Offer and Consent Solicitation are satisfied or waived, then the Warrant Amendment will be adopted.

On May 19, 2023, the Company issued a press release announcing the commencement of the Offer and Consent Solicitation. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Important Additional Information Has Been Filed with the SEC.

Copies of the Schedule TO and Prospectus/Offer to Exchange will be available free of charge at the website of the U.S. Securities and Exchange Commission (the “SEC”) at www.sec.gov. Requests for documents may also be directed to D.F. King & Co., Inc. at (212) 269-5550 (for banks and brokers) or (800) 967-7635 (for all others) or via the following email address: GRNT@dfking.com. A registration statement on Form S-4 relating to the securities to be issued in the Offer has been filed with the SEC but has not yet become effective. Such securities may not be sold nor may offers to buy be accepted prior to the time the registration statement becomes effective.

This announcement is for informational purposes only and shall not constitute an offer to purchase or a solicitation of an offer to sell the Warrants or an offer to sell or a solicitation of an offer to buy any shares of Common Stock in any state in which such offer, solicitation, or sale would be unlawful before registration or qualification under the laws of any such state. The Offer and Consent Solicitation are being made only through the Schedule TO and Prospectus/Offer to Exchange, and the complete terms and conditions of the Offer and Consent Solicitation are set forth in the Schedule TO and Prospectus/Offer to Exchange.

Cautionary Statement Regarding Forward-Looking Statements

Certain statements contained in this Current Report on Form 8-K may be considered “forward-looking” statements within the meaning of the “safe harbor” provisions of the United States Private Securities Litigation Reform Act of 1995. Forward-looking statements are statements that are not historical facts and generally relate to future events or the Company’s future financial or other performance metrics. In some cases, you can identify forward-looking statements by terminology such as “believe,” “may,” “will,” “potentially,” “estimate,” “continue,” “anticipate,” “intend,” “could,” “would,” “project,” “target,” “plan,” “expect,” or the negatives of these terms or variations of them or similar terminology. Such forward-looking statements are subject to risks and uncertainties, which could cause actual results to differ materially from those expressed or implied by such forward-looking statements. The Company advises caution in reliance on forward-looking statements. These statements involve known and unknown risks, uncertainties and other factors that may cause actual results to differ materially from those implied by forward-looking statements. Factors that may cause actual results to differ materially from current expectations include various factors beyond management’s control, including but not limited to general economic conditions and other risks, uncertainties and factors set forth in the sections entitled “Risk Factors” and “Cautionary Note Regarding Forward-Looking Statements” in the Prospectus/Offer to Exchange, and other filings the Company makes with the SEC. Nothing in this communication should be regarded as a representation by any person that the forward-looking statements set forth herein will be achieved or that any of the contemplated results of such forward-looking statements will be achieved. All forward-looking statements in this Current Report on Form 8-K are based on information available to the Company as of the date of this filing. The Company expressly disclaims any obligation to update or alter its forward-looking statements, whether as a result of new information, future events or otherwise.

(d) Exhibits.

*Filed herewith

SIGNATURE

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.