ASPEN TECHNOLOGY INC

CUSIP: 045327103 Class: COM

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

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

Q2 2015
Shares 33,284 Value ($000) $1,516 Avg Close — Range —
Q1 2015
Shares 26,548 Value ($000) $1,022 Avg Close — Range —
Q3 2014
Shares 55,046 Value ($000) $2,076 Avg Close — Range —
Q1 2014
Shares 10,375 Value ($000) $439 Avg Close — Range —