Montauk Renewables, Inc.

This Summary highlights information contained elsewhere in this proxy statement. This summary does not contain all of the information that you should consider. Please read the entire proxy statement carefully before voting.

General Information About the 2025 Annual Meeting of Stockholders

• Time and Date: Thursday, May 22, 2025, at 9:00 a.m. Eastern Daylight Time

• Virtual Meeting: Online at www.virtualshareholdermeeting.com/MNTK2025

• Record Date: Friday, March 28, 2025

• Voting: For all matters, stockholders as of the Record Date have one vote for each share of capital stock held by such person on the Record Date. As of the Record Date, there were 143,336,666 shares of common stock outstanding.

Virtual Annual Meeting

As permitted by Delaware law and our Amended and Restated Bylaws (the “Bylaws”), we will hold a virtual annual meeting to maximize the ability of our stockholders to attend and participate in the Annual Meeting. We believe that the use of this virtual meeting format is the right choice for a company like Montauk, as it not only brings cost savings to us and our stockholders, but also increases our ability to engage with all stockholders, regardless of their size, resources, or physical location.

Montauk Renewables, Inc.|2025 Proxy Statement – 1

Your vote is very important to us. Please cast your vote immediately on all of the proposals to ensure that your shares are represented.

Director Nominee Highlights

You are being asked to vote on the election of two director nominees, both of whom currently serve on our Board. The following table provides summary information about each director nominee as of April 8, 2025.

AC stands for “Audit Committee”

CC stands for “Compensation Committee”

NCG stands for “Nominating and Corporate Governance Committee”

ESCR stands for “Environmental, Safety and Corporate Responsibility Committee”

2–** Montauk Renewables, Inc.|2025 Proxy Statement **