Gran Tierra Energy Inc. (GTE)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Mason Hill Advisors Llc	3,716,114	$18,320,442	10.5%
2.	Lm Asset (im) Inc.	1,716,600	$8,462,838	8.68%
3.	American Century Companies Inc	1,303,105	$6,424,308	0%
4.	Bridgeway Capital Management Inc	558,374	$2,752,784	0.07%
5.	Universal- Beteiligungs- Und Servicegesellschaft Mbh	461,526	$2,275,323	0%