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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	Aspen Technology, Inc. 200 Wheeler Road Burlington MA 01803	Svp & General Counsel	No	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2012-07-31	11,400	$5.27	74,120	No	4	M	Direct
Common Stock	Disposition	2012-07-31	11,400	$23.60	62,720	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
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	2012-07-31	11,400	$0.00	11,400	$5.27

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
43,754		2015-09-14	No	4	M	Direct

Footnotes

The option vested in 16 equal consecutive quarterly installments on the last day of the quarter beginning on December 31, 2005.
This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 11, 2012.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.31 to $23.83, 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.