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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
1672938	William Griffin	20 Crosby Drive Bedford MA 01730	Evp, Field Operations	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	2017-03-31	2,257	$31.26	50,973	No	4	M	Direct
Common Stock	Disposition	2017-03-31	2,257	$58.76	48,716	No	4	S	Direct
Common Stock	Disposition	2017-03-31	1,167	$58.91	47,549	No	4	F	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	F	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	2017-03-31	2,257	$0.00	2,257	$31.26

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
24,831		2026-02-07	No	4	M	Direct

Footnotes

This sale was effected pursuant to a Rule 10b5-1 trading plan completed and executed by the reporting person on September 1, 2016.
Shared withheld by Registrant to satisfy statutory tax withholding requirements on vesting of restricted stock units and distribution of stock.
The option granted at the exercise price of $31.26 per share, representing a right to purchase a total of 36,118 shares, becomes exercisable in 16 equal consecutive quarterly installments on the last business day of each quarter, beginning March 31, 2016.