ASPEN TECHNOLOGY INC

CUSIP: 45327103 Class: COM

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

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

Q4 2014
Shares 600 Value ($000) $21 Avg Close — Range —
Q3 2014
Shares 500 Value ($000) $19 Avg Close — Range —
Q2 2014
Shares 1,700 Value ($000) $79 Avg Close — Range —
Q1 2014
Shares 1,100 Value ($000) $47 Avg Close — Range —
Q4 2013
Shares 2,114 Value ($000) $88 Avg Close — Range —