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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
1332920	G F Hammond	C/O Aspen Technology, Inc. 20 Crosby Drive Bedford MA 01730	Senior Vp & General Counsel	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	2016-09-06	977	$15.50	48,885	No	4	M	Direct
Common Stock	Acquisiton	2016-09-06	5,827	$23.38	54,712	No	4	M	Direct
Common Stock	Acquisiton	2016-09-06	4,940	$32.54	59,652	No	4	M	Direct
Common Stock	Disposition	2016-09-07	18,542	$45.91	41,110	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	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	2016-09-06	977	$0.00	977	$15.50
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2016-09-06	5,827	$0.00	5,827	$23.38
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2016-09-06	4,940	$0.00	4,940	$32.54

Remaning Holdings	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
4,883	2021-07-31	No	4	M	Direct
648	2022-07-31	No	4	M	Direct
3,415	2023-07-31	No	4	M	Direct

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in several transactions at prices ranging from $45.90 to $45.97, 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 $15.50, became exercisable in 16 equal consecutive quarterly installments on the last business day of each quarter, beginning on September 30, 2011.
The option granted at an exercise price of $23.38, becomes 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 $32.54 becomes exercisable in 16 equal consecutive quarterly installments on the last business day of each quarter, beginning on September 30, 2013.