Exercise of Options

TORONTO, ON / ACCESS Newswire / March 27, 2026 / Sintana Energy Inc. (TSX-V:SEI)(AIM:SEI)(OTCQX:SEUSF) (“Sintana” or the “Company“) announces that it has received a notice of exercise in respect of stock options over 800,000 common shares of no-par value each in the Company (“Common Shares“). The options are being exercised by Mr. Sean Austin, the Company’s co-secretary and treasurer. Following the exercise of the options, Mr. Austin will hold a total of 6,925,000 shares in the Company, or 1.35% of the Company’s total issued shares. The options were exercisable at a price of $0.11 per share, and Mr. Austin has paid CAD$88,000 to the Company in respect of the exercise.

Total Voting Rights

Application has been made for admission to trading on the TSX Venture Exchange and AIM of a total of 800,000 new Common Shares of no-par value (“Admission“). Admission is expected on or about 31 March 2026. On Admission, the new Common Shares will rank pari passu with the Company’s existing Common Shares. Following Admission, the Company’s issued share capital will consist of 514,156,240 Common Shares, with each Common Share carrying the right to one vote. The Company does not hold any Common Shares in treasury.

This figure of 514,156,240 Common Shares may therefore be used by shareholders in the Company, as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change in their interest in, the share capital of the Company under the FCA’s Disclosure Guidance and Transparency Rules.

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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

Forward-Looking Statements

The information provided in this announcement contains certain forward-looking statements and information (collectively, “forward-looking statements”) within the meaning of applicable securities laws. Such forward-looking statements include, without limitation, forecasts, estimates, expectations and objectives for future operations that are subject to assumptions, risks and uncertainties, many of which are beyond the control of Sintana. Forward-looking statements are predictive in nature, depend upon or refer to future events or conditions, or include words such as “expect”, “plan”, “anticipate”, “believe”, “intend”, “maintain”, “continue to”, “pursue”, “design”, “result in”, “sustain” “estimate”, “potential”, “growth”, “near-term”, “long-term”, “forecast”, “contingent” and similar expressions, or are events or conditions that “will”, “would”, “may”, “could” or “should” occur or be achieved. The forward-looking statements contained in this announcement speak only as of the date hereof and are expressly qualified by this cautionary statement.

Forward-looking statements are based upon, among other things, factors, expectations and assumptions that Sintana has made as at the date of this announcement regarding, among other things, the receipt of all applicable regulatory approvals and the anticipated schedule for receipt of funds pursuant to the Settlement Agreement.

Undue reliance should not be placed on the forward-looking statements because no assurance can be given that they will prove to be correct. Since forward-looking statements address future events and conditions, by their very nature they involve inherent risks and uncertainties. These risks include, but are not limited to, the ability of Sintana to receive all necessary regulatory approvals and third party satisfaction of all conditions of the Settlement Agreement.

Except as may be required by applicable securities laws, Sintana does not assume any obligation or intent to update publicly or revise any forward-looking statements made herein, whether as a result of new information, future events or otherwise.

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.

SOURCE: Sintana Energy Inc.

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