GT ADVANCED TECHNOLOGIES INC

CUSIP: 36191U106 Class: COM

PRINCIPAL FINANCIAL GROUP INC's Holding History (CIK: 0001126328)

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

Q3 2014
Shares 852,547 Value ($000) $9,233 Avg Close — Range —
Q2 2014
Shares 855,358 Value ($000) $15,909 Avg Close — Range —
Q1 2014
Shares 851,635 Value ($000) $14,521 Avg Close — Range —
Q4 2013
Shares 800,967 Value ($000) $6,985 Avg Close — Range —
Q3 2013
Shares 704,313 Value ($000) $5,994 Avg Close — Range —
Q2 2013
Shares 629,764 Value ($000) $2,614 Avg Close — Range —