Mr. Robert Bose reports

SINTANA ENERGY INC. ANNOUNCES COMMENCEMENT OF 3D SEISMIC ACQUISITION AREA OFF-1, URUGUAY

Sintana Energy Inc. has commenced its planned 3-D seismic acquisition campaign on Area OFF-1, offshore Uruguay.

The Area OFF-1 survey is being carried out by the contractor Viridien, using the BGP Prospector vessel, and will cover a total of approximately 4,300 square kilometres. Acquisition fieldwork will take place over two seasons: February to April, 2026, and November, 2026, to April, 2027, with most acquisition relevant to the key prospects on Area OFF-1 expected to be completed in the first season. Fast-track results from seismic acquired in the first season are expected in Q4 2026, with full PSDM (prestack depth migration) results from the first season expected in Q2 2027.

Sintana Energy holds a 40-per-cent non-operated interest in the Area OFF-1 block, following the farmout in 2025 of a 60-per-cent operating interest to an affiliate of Chevron Corp., and is carried for the total anticipated cost of the 3-D seismic acquisition program.

It is noted that commencement of seismic acquisition follows rejection by courts in Uruguay of several attempted interventions by activist groups, demonstrating the depth of the upfront preparatory work for the campaign and the robustness of Uruguay's environmental consultation and permitting process. Sintana Energy remains committed to all operations with which it is associated being in compliance with the highest health, safety and environmental standards.

Robert Bose, chief executive officer of Sintana Energy, commented: "We are excited to see activity on Area OFF-1 beginning so soon after completion of our acquisition of Challenger Energy in December, 2025. 3-D seismic acquisition is a key next step in defining the potential of Uruguay's offshore embedded within our transatlantic portfolio, and which is underpinned by a relationship with Chevron that spans the conjugate margins. We look forward to providing further updates on progress over the coming quarters."

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 Alternative Investment Market under the symbol SEI and in the United States on the OTCQX under the symbol SEUSF.

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