GT ADVANCED TECHNOLOGIES INC

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

NORTHERN TRUST CORP's Holding History (CIK: 0000073124)

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

Q2 2014
Shares 2,200,000 Value ($000) $3,836 Avg Close — Range —
Q1 2014
Shares 4,050,000 Value ($000) $302,680 Avg Close — Range —
Q4 2013
Shares 1,850,000 Value ($000) $187,544 Avg Close — Range —