GRAN TIERRA ENERGY INC

CUSIP: 38500T101 Class: COM

HUNTINGTON NATIONAL BANK's Holding History (CIK: 0000049205)

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

Q4 2010
Shares 1,500 Value ($000) $12 Avg Close — Range —
Q3 2010
Shares 1,500 Value ($000) $12 Avg Close — Range —
Q2 2010
Shares 1,500 Value ($000) $7 Avg Close — Range —
Q1 2010
Shares 1,500 Value ($000) $9 Avg Close — Range —
Q4 2009
Shares 1,500 Value ($000) $9 Avg Close — Range —
Q3 2009
Shares 1,500 Value ($000) $6 Avg Close — Range —
Q2 2009
Shares 1,500 Value ($000) $5 Avg Close — Range —
Q1 2009
Shares 1,500 Value ($000) $4 Avg Close — Range —