SOURCEFIRE INC

CUSIP: 83616T108 Class: COMMON STOCK

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

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

Q3 2013
Shares 357,962 Value ($000) $27,176 Avg Close — Range —
Q2 2013
Shares 466,740 Value ($000) $25,928 Avg Close — Range —