GT ADVANCED TECHNOLOGIES INC

CUSIP: 36191UAB2 Class: 3% 12/15/20

WELLINGTON MANAGEMENT GROUP LLP's Holding History (CIK: 0000902219)

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

Q3 2014
Shares 397,000 Value ($000) $450 Avg Close — Range —
Q2 2014
Shares 397,000 Value ($000) $693 Avg Close — Range —
Q1 2014
Shares 397,000 Value ($000) $642 Avg Close — Range —
Q4 2013
Shares 2,303,000 Value ($000) $2,335 Avg Close — Range —