SOURCEFIRE INC

CUSIP: 83616T108 Class: COMMON STOCK

ALLIANCEBERNSTEIN L.P.'s Holding History (CIK: 0001109448)

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

Q3 2013
Shares 65,716 Value ($000) $4,989 Avg Close — Range —
Q2 2013
Shares 65,919 Value ($000) $3,662 Avg Close — Range —