• Gran Tierra secured holder consents to amend the indenture for its 9.75% Senior Secured Amortizing Notes due 2031.
• Consents exceeded 50% of outstanding principal, meeting the threshold to implement the changes.
• A supplemental indenture was executed Sept. 22, 2026, effective immediately but operative only when the Maurel & Prom asset sale closes.
• Amendments tie to the planned sale of Colombian and Ecuadorian businesses for about $1.33 billion, subject to adjustment.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Gran Tierra Energy Inc. published the original content used to generate this news brief via GlobeNewswire (Ref. ID: 202609221711HUGIN___UKPR_REG_GNW9831928-en) on September 22, 2026, and is solely responsible for the information contained therein.