X0306 4 2015-05-12 0 0001273441 GRAN TIERRA ENERGY INC. GTE 0001642213 Ellson Ryan C/O GRAN TIERRA ENERGY INC. 200, 150 13 AVENUE SW CALGARY A0 T2R 0V2 ALBERTA, CANADA 0 1 0 0 CFO Common Stock 2015-05-12 4 A 0 60000 0.00 A 60000 D Common Stock 170030 I By West Face SPV (Cayman) I L.P. Stock Option (Rt to Buy) 3.69 2015-05-12 4 A 0 350000 0.00 A 2020-05-11 Common Stock 350000 350000 D Reflects the receipt of a restricted stock unit. Each restricted stock unit represents a contingent right to receive one (1) share of Gran Tierra Energy Inc. common stock. The restricted stock units shall vest in three equal consecutive annual installments on May 12, 2016, May 12, 2017 and May 12, 2018, until fully vested. 1/3rd of the option shares shall vest on May 12, 2016, an additional 1/3rd of the option shares shall vest on May 12, 2017 and the balance of the option shares shall vest on May 12, 2018. /s/ David Hardy, Attorney-In-Fact 2015-05-14