Interim Results For The Three Months Ended March 31, 2026

TORONTO, ON / ACCESS Newswire / May 15, 2026 / Sintana Energy Inc. (TSX-V:SEI)(AIM:SEI)(OTCQX:SEUSF) ("Sintana" or the "Company") announces that it has filed its interim financial statements for the three months ended 31 March 2026 ("Q1 2026") and the accompanying Management's Discussion and Analysis ("MD&A"). The following should be read in conjunction with the complete unaudited unreviewed interim financial statements and the accompanying MD&A for the three months ended 31 March 2026, which are available on the Canadian System for Electronic Document Analysis and Retrieval ("SEDAR+") at www.sedarplus.ca and on Sintana's website at https://sintanaenergy.com Q1 2026 Operational and Financial Highlights Completion of the all-share acquisition of Challenger Energy Group Plc and admission to trading on AIM (both effective December 2025), with integration progressing smoothly during Q1 2026.