ZOGENIX INC

CUSIP: 98978L105 Class: CMN

Tower Research Capital LLC (TRC)'s Holding History (CIK: 0001533421)

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

Q2 2015
Shares 300 Value ($000) $1 Avg Close — Range —
Q1 2015
Shares 35,613 Value ($000) $48 Avg Close — Range —
Q4 2014
Shares 17,160 Value ($000) $24 Avg Close — Range —
Q3 2014
Shares 42,052 Value ($000) $48 Avg Close — Range —
Q2 2014
Shares 358 Value ($000) $1 Avg Close — Range —
Q1 2014
Shares 686 Value ($000) $2 Avg Close — Range —
Q4 2013
Shares 9,992 Value ($000) $34 Avg Close — Range —
Q3 2013
Shares 3,518 Value ($000) $7 Avg Close — Range —
Q2 2013
Shares 2,400 Value ($000) $4 Avg Close — Range —