Intention to list on the NSX

14 April 2026

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

Intention to List on the Namibia Securities Exchange

LONDON, [14] APRIL 2026 - Sintana Energy Inc. (TSX-V: SEI, AIM: SEI, OTCQX: SEUSF) ("Sintana" or the "Company") is pleased to announce that is has engaged IJG Securities (Pty) Ltd. as its sponsor and corporate advisor and initiated discussions with the Namibia Securities Exchange with a view to being admitted for trading on Namibia's national exchange. Subsequent to the admission, the Company intends to explore options to provide and develop liquidity for local Namibian investors.

Knowledge Katti, Director of Sintana and Chairman of Custos Energy, said: "It has always been my vision to see Namibians - especially our youth - become true participants in the wealth that lies beneath our own soil and waters. Sintana's listing on the Namibia Securities Exchange is the realisation of that vision. This is more than a financial opportunity; it is a chance for young Namibians to diversify their futures, to build generational wealth, and to hold a direct stake in the energy story that will define our nation for decades to come.

We are proud that this initiative stands in full alignment with the government's Sixth National Development Plan (NDP6), particularly its focus on youth empowerment and wealth creation for all Namibians - especially our most vulnerable communities. By opening ownership of Namibia's offshore opportunity to Namibians, we are not just listing a company - we are planting the seeds of an ownership economy, one where every young Namibian can say: this resource is mine, this future is mine, and I am invested in it."​​​​​​​​​​​​​​​​ he added. 

Robert Bose, CEO of Sintana, said: "Namibia has been at the heart of Sintana's progress since the opening of the offshore opportunity in 2022. We are excited to take an overdue step to offer local Namibian investors the opportunity to join us as owners of Sintana at this pivotal time for our company and Namibia's energy industry. With upcoming activity across our offshore portfolio, we are keen to become the first oil and gas company to provide Namibians the opportunity to invest directly in the offshore opportunity and significant upcoming developments."

Tiaan Bazuin, CEO of Namibia Securities Exchange, said: "The NSX stands ready as conduit for Namibians to be part of the shareholding in our natural resources. We look forward to welcoming Sintana Energy to the NSX and encourage all sectors to open their shareholding base to their employees, the Namibian public, and our institutions. Our goal is dual fold, to deepen and diversify the investing universe for all Namibians."

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 sintanaenergy.com

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER (AS THAT TERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS RELEASE.

Forward Looking Statements - Certain information set forth in this news release may contain forward-looking statements that involve substantial known and unknown risks and uncertainties, including risks relating to the potential listing of the common shares of the Company on the Namibian Securities Exchange, whether an active market will be established or maintained in respect thereof, and any future financings that may be associated with such listing, if any. These forward-looking statements are subject to numerous risks and uncertainties, certain of which are beyond the control of Sintana, including with respect to the receipt of all regulatory approvals, and availability of capital. Readers are cautioned that the assumptions used in the preparation of such information, although considered reasonable at the time of preparation, may prove to be imprecise and, as such, undue reliance should not be placed on forward-looking statements.