NANOSPHERE INC

CUSIP: 63009F105 Class: COM

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

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

Q1 2014
Shares 27,720 Value ($000) $60 Avg Close — Range —
Q3 2013
Shares 20,479 Value ($000) $41 Avg Close — Range —