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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * DINARDO SHEILA S   2. Issuer Name and Ticker or Trading Symbol ANSYS INC [ANSS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) VP, General Counsel (Last) (First) (Middle) 2600 ANSYS DRIVE, SOUTHPOINTE 3. Date of Earliest Transaction (Month/Day/Year) 02/16/2017 (Street) CANONSBURG, PA 15317 4. If Amendment, Date 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 (City) (State) (Zip) 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 02/16/2017   M   354 (1) A $ 0 22,317 (4) D   Common Stock 02/16/2017   M   275 (2) A $ 0 22,592 (4) D   Common Stock 02/16/2017   F   234 (3) D $ 100.43 22,358 (4) D

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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 Underlying Securities (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 of Derivative Security: 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

Performance Restricted Stock Unit

$ 0

02/16/2017

M

354

(5)

(5)

Common Stock

354

$ 0

9,596

D

Performance Restricted Stock Unit

$ 0

02/16/2017

M

275

(5)

(5)

Common Stock

275

$ 0

9,321

D

Performance Restricted Stock Unit

$ 0

02/16/2017

D(6)

2,921 (6)

(5)

(5)

Common Stock

2,921 (6)

$ 0

6,400

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
DINARDO SHEILA S 2600 ANSYS DRIVE SOUTHPOINTE CANONSBURG, PA 15317			VP, General Counsel

Signatures

Sheila S. DiNardo		02/21/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Shares earned due to a performance factor of 60% upon vesting and settlement of Performance Restricted Stock Units and certification of performance results by the Compensation Committee.
(2)	Shares earned due to a performance factor of 46.5% upon vesting and settlement of Performance Restricted Stock Units and certification of performance results by the Compensation Committee.
(3)	Shares withheld for payment of taxes in connection with the vesting and settlement of Performance Restricted Stock Units described in footnotes 1 and 2 above.
(4)	Includes 6,825 Restricted Stock Units.
(5)	Awarded under Issuer's Second Amended and Restated Long Term Incentive Plan. Performance Restricted Stock Units awarded March 5, 2014 converted into shares of Common Stock upon vesting and settlement of Performance Share Units and certification of performance results by the Compensation Committee.
(6)	Performance Restricted Stock Units cancelled due to performance goal not being 100% achieved.

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