| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2012-02-14 | Amber Capital LP | GRAN TIERRA ENERGY, INC. | 14,388,305 | 5.5% | EDGAR |
| SC 13G | 2011-04-19 | Amber Capital LP | GRAN TIERRA ENERGY, INC. | 11,871,650 | 4.6% | EDGAR |
| SC 13G/A | 2011-02-14 | FMR LLC | GRAN TIERRA ENERGY, INC. | 22,302,810 | 9.3% | EDGAR |
| SC 13G | 2010-09-10 | FMR LLC | GRAN TIERRA ENERGY, INC. | 24,395,675 | 10.4% | EDGAR |
| SC 13G/A | 2009-03-06 | INGALLS & SNYDER LLC | GRAN TIERRA ENERGY, INC. | 9,644,835 | 4.0% | EDGAR |
| SC 13G/A | 2009-03-04 | INGALLS & SNYDER LLC | GRAN TIERRA ENERGY, INC. | 9,857,959 | 5.1% | EDGAR |
| SC 13G/A | 2009-01-23 | Greywolf Capital Management LP | GRAN TIERRA ENERGY, INC. | 933,334 | 0.4% | EDGAR |
| SC 13G/A | 2008-04-08 | Greywolf Capital Management LP | GRAN TIERRA ENERGY, INC. | 1,558,521 | 1.8% | EDGAR |
| SC 13G | 2008-02-04 | Greywolf Capital Management LP | GRAN TIERRA ENERGY, INC. | 2,842,601 | 3.0% | EDGAR |