VOCUS INC

CUSIP: 92858J108 Class: CMN

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q1 2014
Shares 3,701 Value ($000) $49 Avg Close — Range —
Q4 2013
Shares 16,730 Value ($000) $191 Avg Close — Range —
Q2 2013
Shares 1,274 Value ($000) $13 Avg Close — Range —