September 21, 2015

Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE MKT:GTE)(GTE.TO), is pleased to announce that, through its wholly owned subsidiary Gran Tierra Energy International Holdings Ltd., it has secured a credit facility of up to US$500 million with a current borrowing base of US$200 million. The facility replaces Gran Tierra’s previous credit facility that had a borrowing base of

$50.1 Million of Debt Extinguished; Debt Exchanged for 2.4% Overriding Royalty Interest in Future Leases HOUSTON, TX — September 21, 2015 — ZaZa Energy Corporation (“ZaZa” or the “Company”) (NASDAQ: ZAZA) today announced that the holders of all of the 8.00% Subordinated Notes due 2017 (“Notes”), totaling ~$50.1 million in principal plus accumulated interest, have completed the exchange of their Notes