Southern Energy Corp. Announces Successful Cotton Valley Completion Results at Williamsburg

CALGARY, AB / ACCESS Newswire / October 15, 2026 / ("Southern" or the "Company") (TSXV:SOU)(AIM:SOUC), an established producer with natural gas and light oil assets in Mississippi, is pleased to announce completion and initial flow-test results from the Terrible Creek 21-2 2 Cotton Valley vertical well (the "Well") in the Williamsburg Field. The Well encountered a Cotton Valley "C" gross interval thickness of approximately 110 feet, which exceeded expectations based on the two previous offset de