ZOGENIX INC

CUSIP: 98978L105 Class: CMN

DEERFIELD MANAGEMENT COMPANY, L.P.'s Holding History (CIK: 0001009258)

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

Q1 2014
Shares 6,174,809 Value ($000) $17,567 Avg Close — Range —
Q4 2013
Shares 2,570,000 Value ($000) $8,841 Avg Close — Range —
Q3 2013
Shares 4,482,646 Value ($000) $8,297 Avg Close — Range —
Q2 2013
Shares 3,848,572 Value ($000) $6,581 Avg Close — Range —