Gran Tierra Energy Inc. (GTE)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Royal Bank Of Canada	1,188,711	$6,705,000	0%
2.	Group One Trading, L.p.CALL	961,400	$5,422,296	0.01%
3.	Rwc Asset Management Llp	772,507	$4,358,753	0.26%
4.	Two Sigma Investments, Lp	726,839	$4,099,372	0%
5.	Connor, Clark & Lunn Investment Management Ltd.	360,825	$2,026,948	0%