CUBIST PHARMACEUTICALS INC

CUSIP: 229678107 Class: COM

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

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

Q4 2014
Shares 2,720,073 Value ($000) $273,775 Avg Close — Range —
Q3 2014
Shares 3,421,430 Value ($000) $226,978 Avg Close — Range —
Q2 2014
Shares 3,234,570 Value ($000) $225,838 Avg Close — Range —
Q1 2014
Shares 2,698,235 Value ($000) $197,376 Avg Close — Range —
Q4 2013
Shares 2,703,519 Value ($000) $186,191 Avg Close — Range —
Q3 2013
Shares 1,825,134 Value ($000) $115,987 Avg Close — Range —
Q2 2013
Shares 1,591,179 Value ($000) $76,838 Avg Close — Range —