Horizon Petroleum Ltd. press release

Notice of Annual and Special Meeting of Shareholders

2026-06-30

TSXV - TSX Venture Exchange · Natural Gas · Oil · Canada · Management & Governance

TORONTO, ON / ACCESS Newswire/ 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, 4thFloor, 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:

| Sintana Energy Inc

Robert Bose, Chief Executive Officer

Eytan Uliel, President | Tel: +44 (0) 7747 845 987 | | Zeus - Nomad and Joint Broker

Antonio Bossi / Darshan Patel / George Duxberry

Simon Johnson (Broking) | Tel: +44 (0) 20 3829 5000 | | Cavendish Capital Markets Limited - Joint Broker

Neil McDonald / Derrick Lee / Pearl Kellie | Tel: +44 (0) 20 3493 8000 | | Jonathan Paterson - Investor Relations jonathan.paterson@harbor-access.com | Tel: +1 475 477 9401 | | CAMARCO - Financial PR Billy Clegg / Georgia Edmonds / Sam Morris | Tel: +44 (0) 20 3757 4980 |

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.

SOURCE: Sintana Energy Inc.

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