CUBIST PHARMACEUTICALS INC

CUSIP: 229678107 Class: COM

Rock Springs Capital Management LP's Holding History (CIK: 0001595725)

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

Q4 2014
Shares 87,500 Value ($000) $8,807 Avg Close — Range —
Q3 2014
Shares 46,500 Value ($000) $3,085 Avg Close — Range —
Q2 2014
Shares 39,000 Value ($000) $2,723 Avg Close — Range —
Q1 2014
Shares 30,000 Value ($000) $2,195 Avg Close — Range —
Q4 2013
Shares 17,500 Value ($000) $1,205 Avg Close — Range —