ZOGENIX INC

CUSIP: 98978L105 Class: CMN

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

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

Q3 2014
Shares 248 Value ($000) $0 Avg Close — Range —
Q4 2013
Shares 13,322 Value ($000) $46 Avg Close — Range —