ARATANA THERAPEUTICS INC

CUSIP: 03874P101 Class: COM

DRIEHAUS CAPITAL MANAGEMENT LLC's Holding History (CIK: 0000938206)

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

Q1 2015
Shares 107,591 Value ($000) $1,723 Avg Close — Range —
Q4 2014
Shares 109,222 Value ($000) $1,946 Avg Close — Range —
Q3 2014
Shares 91,838 Value ($000) $922 Avg Close — Range —
Q2 2014
Shares 140,114 Value ($000) $2,187 Avg Close — Range —
Q1 2014
Shares 341,530 Value ($000) $6,339 Avg Close — Range —