Dec 21 (Reuters) - Gran Tierra Energy Inc GTE.TO :
* GRAN TIERRA ENERGY INC - ENTERED INTO 11TH AMENDMENT TO CREDIT AGREEMENT - SEC FILING
* GRAN TIERRA ENERGY INC - AMENDMENT AMENDS CREDIT AGREEMENT, DATED AS OF SEPTEMBER 18, 2015
* GRAN TIERRA ENERGY - ELEVENTH AMENDMENT EXTENDS MATURITY DATE FROM NOV 10, 2020 TO NOV 10, 2021