April 14, 2026

This announcement replaces RNS Announcement No. 2559A in its entirety. 

Gran Tierra Energy Inc.

(the "Company")

Notification of Transactions in the Company's Shares by Directors and Persons Discharging Managerial Responsibility

The Company announces the following transactions in Performance Stock Units undertaken by directors / persons discharging managerial responsibility.

Performance Share Units (PSUs) granted to Executives on February 23, 2023 have vested and have been paid out to participants based on a ten-day volume weighted average price ("10 day VWAP") from December 31, 2025.  The original grants of PSUs were adjusted by a performance factor of 1.33. 

Restricted Stock Units (RSUs) granted to Executives on February 26, 2025, vest in three equal installments on the anniversary of each year following the grant. The first installment has vested and has been paid out to participants based on a ten-day volume weighted average price ("10 day VWAP") from December 31, 2025. The Notification of Dealing Form for the vesting and payment of the PSUs and RSUs for PDMRs can be found below.

This announcement is made in accordance with Article 19 of the EU Market Abuse Regulation 596/2014.

Contact Information:

Gary Guidry
President and Chief Executive Officer

Ryan Ellson
Executive Vice President and Chief Financial Officer

Phillip Abraham
Executive Vice President, Legal and Land and Corporate Secretary

(403) 265-3221

[email protected]