NORTEK INC

CUSIP: 656559309 Class: COM NEW

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

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

Q1 2014
Shares 2,912 Value ($000) $239 Avg Close — Range —
Q4 2013
Shares 4,334 Value ($000) $323 Avg Close — Range —
Q3 2013
Shares 4,334 Value ($000) $298 Avg Close — Range —