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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	Aspen Technology, Inc. 200 Wheeler Road Burlington MA 01803	Evp, Sales And Strategy	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
Common Stock	Acquisiton	2011-05-06	4,326	$2.98	108,441	No	4	M	Direct
Common Stock	Acquisiton	2011-05-06	4,974	$2.98	113,415	No	4	M	Direct
Common Stock	Disposition	2011-05-06	9,300	$15.80	104,115	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	2011-05-06	4,326	$0.00	4,326	$2.98
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2011-05-06	4,974	$0.00	4,974	$2.98

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2004-12-31	2012-08-18	No	4	M	Direct
0	2006-09-30	2012-08-18	No	4	M	Direct

Footnotes

The option, representing a right to purchase a total of 4,326 shares, became exercisable as follows: 750 shares on December 31, 2002; 748 shares on March 31, 2003; 750 shares on each of June 30, 2003, September 30, 2003 and December 31, 2003; and 578 shares on December 31, 2004.
The option, representing a right to purchase a total of 7,674 shares, became exercisable as follows: 2 shares on March 31, 2003; 750 shares on each of March 31, 2004, June 30, 2004 and September 30, 2004; 172 shares on December 31, 2004; and 7 increments of 750 shares at the end of each quarter commencing on March 31, 2005.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.80 to $15.85, 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.