Mr. Robert Bose reports

NOTICE OF ANNUAL AND SPECIAL MEETING OF SHAREHOLDERS

Sintana Energy Inc. will hold its annual and special meeting of shareholders at 10 a.m. EDT on Thursday, Aug. 6, 2026, at 17 State St., fourth floor, New York, N.Y., 10004.

At the meeting, inter alia, resolutions will be proposed to approve the amendments to the company's equity incentive plan and to the company's bylaws. The management information circular and the notice of the meeting containing the full resolutions will be posted to shareholders shortly and will be available on the company's website.

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 London Stock Exchange's AIM under the symbol SEI and in the United States on the OTCQX under the symbol SEUSF.