OPTIMER PHARMACEUTICALS INC

CUSIP: 68401H104 Class: CMN

WATER ISLAND CAPITAL LLC's Holding History (CIK: 0001222765)

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

Q3 2013
Shares 2,939,810 Value ($000) $37,042 Avg Close — Range —
Q2 2013
Shares 30,415 Value ($000) $440 Avg Close — Range —