Gran Tierra Energy Inc. issued US$11,717,000 aggregate principal amount of additional 9.750% Senior Secured Amortizing Notes due 2031 on March 2, 2026, in exchange for a like amount of its 9.500% Senior Secured Amortizing Notes due 2029, resulting in total Notes outstanding of US$503,570,000. The Additional Notes form a single series with the Original Notes issued on February 18, 2026, under the supplemented Indenture.