GT ADVANCED TECHNOLOGIES INC

CUSIP: 36191U106 Class: COM

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q4 2014
Shares 949,867 Value ($000) $314 Avg Close — Range —
Q3 2014
Shares 222,030 Value ($000) $2,405 Avg Close — Range —
Q2 2014
Shares 442,620 Value ($000) $8,233 Avg Close — Range —
Q1 2014
Shares 190,756 Value ($000) $3,252 Avg Close — Range —
Q2 2013
Shares 123,041 Value ($000) $511 Avg Close — Range —