SOURCEFIRE INC

CUSIP: 83616T108 Class: COMMON STOCK

BLAIR WILLIAM & CO/IL's Holding History (CIK: 0000902367)

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

Q3 2013
Shares 26,861 Value ($000) $2,039 Avg Close — Range —
Q2 2013
Shares 379,560 Value ($000) $21,084 Avg Close — Range —