| Greywolf Capital Overseas Fund +5 co-filersReporting owner · 22 transactions | — | 77.15M†as of Mar 2008 | — | 142.0K | 2.53M |
| Bay II Resource Partners LP +5 co-filers10% owner · 156 transactions | — | 36.14Mas of Jun 2021 | — | 28.89M | 48.29M |
| Equinox Partners LP +3 co-filersDirector, 10% owner · 87 transactions | — | 6.38M† | — | 2.67M | — |
| LM Asset Management Inc. +2 co-filers10% owner · 12 transactions | — | 4.86M† | — | 414.0K | — |
| Lau Daniel +2 co-filers10% owner · 3 transactions | — | 4.44M† | — | 62.0K | — |
| LM Asset (IM) Inc. +2 co-filers10% owner · 4 transactions | — | 4.38M† | — | 400.0K | — |
| Lau Daniel10% owner · 1 transaction | — | 3.56M† | — | 360.0K | — |
| Price John Scott WardDirector · 14 transactions | — | 2.71Mas of Jun 2015 | — | — | 4.47M |
| Dawson WalterDirector · 18 transactions | — | 2.61M†as of Aug 2010 | — | — | 450.0K |
| Scott Jeffrey JExecutive Chairman, Director · 10 transactions | — | 2.51Mas of Mar 2015 | 100.0K | — | 100.0K |
| Orunesu RafaelPres., GTE Argentina · 15 transactions | — | 2.11Mas of Jun 2014 | 470.8K | — | 437.5K |
| Coffield DanaCEO and President, Director · 48 transactions | — | 2.03Mas of Mar 2014 | 165.8K | — | 1.00M |
| Wei MaxVP Operations · 1 transaction | — | 1.73Mas of Dec 2008 | — | — | — |
| Johnson VerneDirector · 28 transactions | — | 945.2Kas of Jan 2012 | — | — | 684.3K |
| Guidry GaryPresident and CEO, Director · 178 transactions | — | 506.3K | 4.82M | 1.38M | 52.0K |
| Antony Raymond PeterDirector · 9 transactions | — | 502.5Kas of Mar 2011 | 142.9K | — | 292.9K |
| West LawrenceVP, Exploration · 25 transactions | — | 350.0Kas of Feb 2023 | 1.47M | 160.0K | — |
| Johnson Alan MartinSee Remarks · 13 transactions | — | 289.6K†as of Feb 2019 | 270.5K | 46.3K | — |
| Mawdsley Susan LynnSee Remarks · 9 transactions | — | 271.9Kas of Feb 2019 | 224.0K | 56.0K | — |
| Ellson RyanChief Financial Officer · 155 transactions | — | 213.9K† | 3.31M | 181.7K | 20.8K |
| Nightingale DuncanExecutive Vice President · 11 transactions | — | 151.9Kas of Sep 2015 | 167.5K | 18.6K | — |
| O'Leary Shane P.COO · 20 transactions | — | 122.6K†as of Mar 2014 | 530.0K | — | 500.0K |
| Evans JimEVP, Corporate Services · 174 transactions | — | 102.3K† | 1.86M | 96.5K | 6.1K |
| Hardy David EldonVP, Legal and General Counsel · 17 transactions | — | 78.5K†as of Dec 2016 | 161.7K | 34.0K | — |
| Smith David PDirector · 22 transactions | — | 62.8K | 19.4K | 532.0K | 12.5K |
| Berthelet Remi AnthonyChief Operating Officer · 7 transactions | — | 60.7Kas of Aug 2020 | 18.7K | 42.0K | — |
| Wade Brooke N.Director · 23 transactions | — | 58.8K | 30.0K | 2.13M | 242.6K |
| Rozon James RobertCFO · 6 transactions | — | 57.5Kas of Mar 2015 | 172.5K | — | — |
| Mah Glen WVP, Business Development · 3 transactions | — | 50.0Kas of Feb 2019 | 230.5K | — | — |
| Kirton Nicholas G.Director · 10 transactions | — | 44.2Kas of Mar 2012 | — | 46.6K | — |
| Abraham Phillip DEVP, Legal and Land · 81 transactions | — | 43.1K | 126.0K | — | — |
| Trimble Rodger DerrickVP, Investor Relations · 103 transactions | — | 36.0Kas of Nov 2023 | 1.36M | 69.7K | — |
| Moreira Julio Cesar DiasPres., GT Brasil Ltda. · 10 transactions | — | 35.8K†as of Mar 2014 | 33.3K | — | 100.0K |
| Morin SebastienChief Operating Officer · 59 transactions | — | 35.7K | 200.8K | 7.4K | 26.8K |
| Eden Martin HChief Financial Officer · 9 transactions | — | 31.6K†as of Mar 2010 | 125.0K | 14.0K | 125.0K |
| Monges Reyes Carlos ArturoPres., Gran Tierra Energy Peru · 5 transactions | — | 23.7Kas of Mar 2015 | 66.7K | — | — |
| Hodgins Robert B.Director · 4 transactions | — | 20.0Kas of Jun 2019 | 10.8K | 20.0K | — |
| Macey Gerald JosephDirector · 2 transactions | — | 20.0Kas of May 2011 | — | 20.0K | — |
| Caldwell EdSee Remarks · 3 transactions | — | 15.0Kas of Feb 2019 | 212.3K | 15.0K | — |
| Will Robert GVP, Asset Management · 12 transactions | — | 9.9Kas of Nov 2023 | 3.7K | — | — |
| Hazell EvanDirector · 11 transactions | — | 8.5K | 24.3K | 30.0K | — |
| Coral AdrianPresident, GTE Colombia, Ltd. · 14 transactions | — | 8.3Kas of Mar 2018 | 65.0K | — | — |
| Royal RonaldDirector · 14 transactions | — | 3.0K | 28.5K | 203.0K | 25.5K |
| Dey Peter JamesDirector · 6 transactions | — | 0as of Jul 2025 | 13.7K | 20.0K | — |
| Redford AlisonDirector · 2 transactions | — | 0as of May 2024 | 4.0K | — | — |