Mr. Robert Bose reports

SINTANA ANNOUNCES AMENDMENTS TO ITS BYLAWS

Sintana Energy Inc.'s board of directors has approved amendments to the company's bylaw No. 1 in order to, amongst other things, comply with the AIM (Alternative Investment Market) Rules for companies (as published by the London Stock Exchange PLC, as amended from time to time) following the company's admission to trading on the AIM Market of the London Stock Exchange (AIM) on Dec. 23, 2025.

The bylaw amendments are intended to implement certain AIM-related shareholder disclosure and enforcement requirements that are not reflected in the same manner under Canadian securities rules, as well as modernize certain director residency requirements to better align with changes made to the Business Corporations Act (Alberta) since the original bylaws came into effect.

With respect to AIM compliance, the bylaw amendments require persons with direct or indirect holdings of 3 per cent or more of any class of AIM securities of the company, including through a combination of shares, depositary interests and qualifying financial instruments, to notify the company of certain information without delay (and in any event within two business days) of becoming a significant shareholder, including, but not limited to, (i) the percentage of its holding and the date on which the relevant threshold was reached or crossed; (ii) if applicable, the chain of controlled undertakings through which the AIM security is effectively held; (iii) the identity of the significant shareholder; (iv) the price, amount, and class of shares or depositary interest concerned; and (v) the nature of the transaction giving rise to the notification. The bylaw amendments also require further notification from a significant shareholder each time such holdings above 3-per-cent increase or decrease by a single percentage.

If a significant shareholder fails to comply with these disclosure requirements, the bylaw amendments provide for consequences that include restrictions on the right to attend and vote at shareholder meetings and, in the case of larger holdings, restrictions on the receipt of dividends and the ability to transfer shares, subject to limited exceptions.

Regulatory approvals

Under the Business Corporations Act (Alberta), the board may make, amend or repeal the company's bylaws by resolution. Accordingly, the bylaw amendments are currently in effect. To remain effective, the bylaw amendments must also be ratified by a majority of the company's shareholders. The full text of the bylaw amendments will be placed before the company's shareholders at the next annual meeting, where the shareholders will be asked to consider and vote on the bylaw amendments. If the bylaw amendments are approved by a majority of shareholders eligible to vote at the meeting, they will continue in force without interruption. If they are not approved, the bylaw amendments will cease to have effect following the meeting, and the company's previous bylaws will be reinstated automatically.

The bylaw amendments also remain subject to final acceptance by the TSX Venture Exchange

About Sintana Energy Inc.

Sintana Energy is an Atlantic Margin-focused oil and gas company, holding interests in a diverse portfolio of high-impact assets that spans the Southern Atlantic conjugate margin. The company's current portfolio is strategically positioned in the emerging frontier geographies of Namibia, Uruguay and Angola, with additional legacy assets in Colombia and the Bahamas. Led by an experienced team, Sintana Energy is partnered with major industry players, and benefits from significant carry support, on key licences across multiple jurisdictions. Sintana Energy is listed on the TSX-V in Canada under the symbol SEI, in the United Kingdom on the LSE-AIM under the symbol SEI and in the United States on the OTCQX under the symbol SEUSF.

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