Portfolio Update

TORONTO, ON / ACCESS Newswire / March 30, 2026 / Sintana Energy Inc. (TSX-V:SEI)(AIM:SEI)(OTCQX:SEUSF) ("Sintana" or the "Company") , the Atlantic-margin focused oil and gas company, is pleased to provide the following update on developments across its portfolio of high-impact assets. Highlights 57% increase to Mopane 3C contingent resource - Sintana net interest now ~67 mmboe AREA OFF-1 Uruguay seismic underway, with 22% of planned season one acquisition completed Strong regional momentum in Uruguay continues, with Chevron and QatarEnergy farming-in to multiple offshore blocks adjacent to the Company's AREA OFF-3 block $3m cash received from ExxonMobil as first instalment of agreed Colombia settlement Robert Bose, CEO of Sintana, said: "Over the past two weeks, it has been extremely encouraging to see a number of positive catalysts unfold across our portfolio.