SOURCEFIRE INC

CUSIP: 83616T108 Class: COMMON STOCK

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

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

Q3 2013
Shares 179,084 Value ($000) $13,596 Avg Close — Range —
Q2 2013
Shares 173,576 Value ($000) $9,643 Avg Close — Range —