Gran Tierra sells Colombia/Ecuador assets to Maurel & Prom for $1.33B; to become debt-free

GRAN TIERRA ENERGY INC.

• Total consideration of $1.33B includes assumption of debt and prepayment facility; net cash proceeds ~$315M.
• Company expects ~$250M cash at close, zero debt, and a $65M note receivable due in 364 days.
• Continuing company pro-forma PDP NAV (NPV10 BT) ~$12.49/share, an 83% premium to 20-day VWAP.
• Plans meaningful return of capital to stockholders via share repurchase; structure to be announced.
• Transaction unanimously approved by Board; target close on or about Dec 31, 2026, subject to approvals.