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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
929940	Aspen Technology Inc	AZPN	Services-Computer Programming Services (7371)	042739697

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1251378	E Manolis Kotzabasakis	C/O Aspen Technology, Inc. 20 Crosby Drive Bedford MA 01730	Cto And Executive Vp Of R&D	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2015-05-21	1,169	$23.38	88,802	No	4	M	Direct
Common Stock	Acquisiton	2015-05-21	5,553	$15.50	94,355	No	4	M	Direct
Common Stock	Disposition	2015-05-21	12,722	$44.30	81,633	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2015-05-21	1,169	$0.00	1,169	$23.38
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2015-05-21	5,553	$0.00	5,553	$15.50

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
23,232		2022-07-31	No	4	M	Direct
5,260		2021-07-31	No	4	M	Direct

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $44.30 to $44.31, inclusive. The reporting person undertakes to provide to Aspen Technology, Inc., any security holder of Aspen Technology, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
The option granted at the exercise price of $23.38, representing a right to purchase 27,401 shares, became exercisable in 16 equal consecutive quarterly installments on the last business day of each quarter, beginning on September 28, 2012.
The option granted at the exercise price of $15.50, representing a right to purchase 37,500 shares, became exercisable in 16 equal consecutive quarterly installments on the last business day of each quarter, beginning on September 30, 2011.