GRAN TIERRA ENERGY INC

CUSIP: 38500T101 Class: COM

NORTH STAR ASSET MANAGEMENT INC's Holding History (CIK: 0001056559)

Note: Option positions (PUT/CALL) are excluded.

Q4 2014
Shares 15,250 Value ($000) $59 Avg Close — Range —
Q3 2014
Shares 15,250 Value ($000) $84 Avg Close — Range —
Q2 2014
Shares 16,750 Value ($000) $136 Avg Close — Range —
Q1 2014
Shares 17,750 Value ($000) $133 Avg Close — Range —
Q4 2013
Shares 21,000 Value ($000) $154 Avg Close — Range —
Q3 2013
Shares 21,000 Value ($000) $149 Avg Close — Range —
Q2 2013
Shares 26,000 Value ($000) $156 Avg Close — Range —