Pietri Antonio J Form 4 ASPEN TECHNOLOGY / Antonio J Pietri ownership change

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Pietri Antonio J

(Last) (First) (Middle)

C/O ASPEN TECHNOLOGY, INC.

20 CROSBY DRIVE

(Street)

BEDFORD MA 01730

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ASPEN TECHNOLOGY INC /DE/ [ AZPN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
X	Officer (give title below)	Other (specify below)
President & CEO

3. Date of Earliest Transaction (Month/Day/Year)
02/16/2018

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/16/2018		M		3,264	A	$32.54	250,416	D
Common Stock	02/16/2018		M		25	A	$43.44	250,441	D
Common Stock	02/16/2018		M		26,900	A	$23.38	277,341	D
Common Stock	02/16/2018		S		26,900	D	$76.56(1)	250,441	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option (Right to Buy)	$32.54	02/16/2018		M			3,264	(2)	07/31/2023	Common Stock	3,264	$0	44,754	D
Employee Stock Option (Right to Buy)	$43.44	02/16/2018		M			25	(3)	07/31/2024	Common Stock	25	$0	50,332	D
Employee Stock Option (Right to Buy)	$23.38	02/16/2018		M			26,900	(4)	07/31/2022	Common Stock	26,900	$0	0	D

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $76.01 to $77.01, 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.

2. The option granted at the exercise price of $32.54 per share, representing a right to purchase a total of 48,018shares, became exercisable in 16 equal consecutive quarterly installments on the last business day of the quarter beginning on September 30, 2013.

3. The option granted at the exercise price of $43.44 per share, representing a right to purchase a total of 50,357 shares, becomes exercisable in 16 equal consecutive quarterly installments on the last business day of the quarter, beginning on September 30, 2014.

4. The option granted at the exercise price of $23.38 per share, representing a right to purchase a total of 32,079 shares, became exercisable in 16 equal consecutive quarterly installments on the last business day of each quarter, beginning September 28, 2012.

	/s/ F.G. Hammond, attorney-in-fact for Mr. Pietri	02/21/2018
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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