X0306 4 2021-05-19 0 0001273441 GRAN TIERRA ENERGY INC. GTE 0001678494 Trimble Rodger Derrick C/O GRAN TIERRA ENERGY INC. 900, 520 3 AVENUE SW CALGARY A0 T2P 0R3 ALBERTA, CANADA 0 1 0 0 VP, Investor Relations Common Stock 2021-05-19 4 A 0 3024 0.68 A 226985 D These shares were acquired on May 19, 2021 through the Gran Tierra Inc. Employee Stock Purchase Plan in a transaction that was exempt under both Rule 16b-3(d) and Rule 16b-3(c). Purchase price of security was transacted in Canadian currency and converted to U.S. currency. /s/ Diane Phillips, Attorney-In Fact 2021-05-19