30 June 2026

Sintana Energy Inc.
("Sintana" or "the Company")

Notice of Annual and Special Meeting of Shareholders

TORONTO, JUNE 30, 2026 - Sintana Energy Inc. (TSX-V: SEI, AIM: SEI, OTCQX: SEUSF) announces that the Company's Annual and Special Meeting of Shareholders (the "Meeting") will be held at 10:00 a.m. (EDT) on Thursday, 6 August 2026 at 17 State Street, 4^th Floor, New York, NY 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 By-Laws. 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: https://sintanaenergy.com.

For further information, please contact:

About Sintana Energy

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 licenses 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 U.S. on the OTCQX under the symbol "SEUSF".

For further information, please visit https://sintanaenergy.com