MESA ROYALTY TRUST/TX

Evaluation of Disclosure Controls and Procedures. The Trustee maintains disclosure controls and procedures designed to ensure that information required to be disclosed by the Trust in the reports that it files or submits under the Exchange Act, is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and regulations. Disclosure controls and procedures include controls and procedures designed to ensure that information required to be disclosed by the Trust in the reports that it files or submits under the Exchange Act is accumulated and communicated by the Working Interest Owners to The Bank of New York Mellon Trust Company, N.A., as Trustee of the Trust, and its employees who participate in the preparation of the Trust’s periodic reports as appropriate to allow timely decisions regarding required disclosure.

As of the end of the period covered by this report, the Trust officer acting on behalf of the Trustee responsible for the administration of the Trust conducted an evaluation of the Trustee’s disclosure controls and procedures. The officer acting on behalf of the Trustee concluded that the Trust’s disclosure controls and procedures were effective with respect to the Trustee and its employees.

Due to the contractual arrangements of (i) the Trust Indenture and (ii) the rights of the Trust under the Conveyance regarding information furnished by the Working Interest Owners, the Trustee relies on information provided by the Working Interest Owners, including (i) the status of litigation, (ii) historical operating data, plans for future operating and capital expenditures and reserve information, (iii) information

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relating to projected production, and (iv) conclusions regarding reserves by their internal reserve engineers or other experts in good faith. See Part II Item 1A. “Other Information — Risk Factors — Trust unitholders and the Trustee have no control over the operation or development of the Royalty Properties” and “The Trustee relies upon the Working Interest Owners for information regarding the Royalty Properties” in the Trust’s Annual Report on Form 10-K for the year ended December 31, 2025 for a description of certain risks relating to these arrangements and reliance, including filings such as this filing outside the time periods specified notwithstanding effective disclosure controls and procedures, of the Trustee regarding information under its control.

The officer acting on behalf of the Trustee has not conducted a separate evaluation of the disclosure controls and procedures with respect to information furnished by the Working Interest Owners. The Trustee notes that it is conducting an ongoing review of certain information and calculations by the Working Interest Owners. See “Trustee’s Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and Capital Resources” under Part II, Item 7 of the Trust’s Annual Report on Form 10-K for the year ended December 31, 2025 for information concerning controls and procedures with respect to the Royalties and information related to the Trustee’s review of certain information and calculations by the Working Interest Owners.

Changes in Internal Control over Financial Reporting. In connection with the evaluation by the Trustee of changes in internal control over financial reporting of the Trust that occurred during the Trust’s last fiscal quarter, no change in the Trust’s internal control over financial reporting was identified that has materially affected, or is reasonably likely to materially affect, the Trust’s internal control over financial reporting. The Trustee notes for purposes of clarification that it has no authority over, has not evaluated and makes no statement concerning the internal control over financial reporting of the Working Interest Owners.

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PART II — OTHER INFORMATION

Currently, except as described below, the Trust is not aware of any material legal proceedings pending to which the Trust is a party or of which any of its property is the subject. Based on information provided by Scout, there is a pending case that seeks to increase royalty calculations for wells operated by Scout in Kansas that flow through the Jayhawk plant. Scout is defending against the lawsuit, Cooper-Clark Foundation v. Scout Energy Management, LLC, District Court, Kansas, question certified to the Kansas Supreme Court. In the event of an adverse result in the litigation, there may be a recalculation of prior royalties, and resulting net profits available to the Trust for the time period, as to those wells included in the litigation, which at this time Scout believes to only include three wells in which the Trust owns an interest. Based on current information provided by Scout, Scout does not anticipate any material adverse effect on the Trust.

The Trustee has been advised by the Working Interest Owners that it may be subject to litigation in the ordinary course of business for certain matters that include the Royalty Properties. While each of the Working Interest Owners has advised the Trustee that it does not currently believe any of the pending litigation will have a material adverse effect net to the Trust, in the event such matters were adjudicated or settled in a material amount and charges are made against royalty income, such charges could have a material impact on future royalty income.