SOURCEFIRE INC

CUSIP: 83616T108 Class: COMMON STOCK

GW&K Investment Management, LLC's Holding History (CIK: 0001082917)

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

Q3 2013
Shares 218,020 Value ($000) $16,552 Avg Close — Range —
Q2 2013
Shares 334,768 Value ($000) $18,596 Avg Close — Range —