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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1273441	Gran Tierra Energy Inc.	GTE	Crude Petroleum & Natural Gas (1311)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1455785	P. Shane O'leary	C/O Gran Tierra Energy Inc. 300, 625 - 11Th Avenue S.w. Calgary A0 T2R 0E1	Coo	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2011-12-13	60,000	$2.37	60,000	No	4	X	Direct
Common Stock	Disposition	2011-12-13	30,000	$4.90	30,000	No	4	S	Direct
Common Stock	Disposition	2011-12-14	30,000	$4.75	0	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	X	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (Rt to Buy)	Disposition	2011-12-13	60,000	$0.00	60,000	$2.37

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2010-03-04	2019-03-04	No	4	X	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	9,300	Indirect	By Shane and Christine O'Leary

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.75 to $4.76, inclusive. The undersigned hereby undertakes to provide the Issuer, any security holder of the Issuer or the staff of the U.S. Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.
Stock option shall vest and become exercisable is 3 equal consecutive annual installments commencing on the first, second and third anniversary of the vesting commencement date.