8-K

MONTAUK RENEWABLES, INC.

Date: May 28, 2026

/s/ John Ciroli

John Ciroli

Chief Legal Officer and Secretary

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 26, 2026

Montauk Renewables, Inc.

(Exact name of registrant as specified in its charter)


Delaware	1-39919	85-3189583
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

5313 Campbells Run Road, Suite 200

Pittsburgh, PA 15205

(Address of principal executive offices) (Zip Code)

(412) 747-8700

(Registrant’s telephone number, including area code)

N/A

(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:

☐

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 $0.01 per share	MNTK	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 5.07

Submission of Matters to a Vote of Security Holders.

On May 26, 2026, Montauk Renewables, Inc. (the “Company”) held its 2026 Annual Meeting of Stockholders (the “Annual Meeting”). Set forth below are the final voting results for each of the matters submitted to a vote of the stockholders at the Annual Meeting.

Proposal 1. The two director nominees nominated by the Company’s Board of Directors (the “Board”) for election to the Board were elected, each for a term that will expire at the annual meeting of stockholders held in 2029, based upon the following votes:


Nominee	For	Withheld	Broker Non-Votes
Jennifer Cunningham	95,930,621	1,276,666	4,327,793
Sean McClain	91,449,396	5,757,891	4,327,793

Proposal 2. The proposal to ratify the appointment of Grant Thornton LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026 was approved based upon the following votes:


For	Against	Abstentions	Broker Non-Votes
96,949,187	4,570,221	15,672	0

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.