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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
1467828	P. Mark Sullivan	C/O Aspen Technology, Inc. 20 Crosby Drive Bedford MA 01730	Executive Vp & Cfo	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	2015-05-18	3,094	$10.93	82,476	No	4	M	Direct
Common Stock	Acquisiton	2015-05-18	6,387	$32.54	88,863	No	4	M	Direct
Common Stock	Acquisiton	2015-05-18	6,851	$23.38	95,714	No	4	M	Direct
Common Stock	Acquisiton	2015-05-18	9,375	$15.50	105,089	No	4	M	Direct
Common Stock	Disposition	2015-05-18	25,707	$43.00	79,382	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	M	Direct
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	2015-05-18	3,094	$0.00	3,094	$10.93
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2015-05-18	6,387	$0.00	6,387	$32.54
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2015-05-18	6,851	$0.00	6,851	$23.38
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2015-05-18	9,375	$0.00	9,375	$15.50

Remaning Holdings	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2017-08-01	No	4	M	Direct
14,370	2023-07-31	No	4	M	Direct
8,563	2022-07-31	No	4	M	Direct
2,344	2021-07-31	No	4	M	Direct

Footnotes

The option granted at the exercise price of $10.93, representing a right to purchase 49,500 shares, became exercisable in 16 equal consecutive quarterly installments on the last business day of each quarter beginning on September 30, 2010.
The option, granted at an exercise price of $32.54, representing a right to purchase 25,546 shares, became exercisable in 16 equal consecutive quarterly installments on the last business day of the quarter beginning on September 30, 2013.
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 September 30, 2011.