Statement of Changes in Beneficial Ownership (4)

FORM 4 [X] 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
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response... 0.5
Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* Ross Brian T	2. Issuer Name and Ticker or Trading Symbol MTS SYSTEMS CORP [ MTSC ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) EVP & CFO
(Last) (First) (Middle) 14000 TECHNOLOGY DRIVE	3. Date of Earliest Transaction (MM/DD/YYYY) 4/7/2021
(Street) EDEN PRAIRIE, MN 55344 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	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. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	4/7/2021		D		8507 ⁽¹⁾	D	$58.5	8017.0917	D
Common Stock	4/7/2021		D		8017.0917 ⁽²⁾	D	$58.5	0	D

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		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 of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (right to buy)	$46.25	4/7/2021		D			4673	⁽³⁾	4/17/2024	Common Stock	4673	⁽³⁾	0	D
Stock Option (right to buy)	$52.65	4/7/2021		D			4367	⁽³⁾	5/15/2024	Common Stock	4367	⁽³⁾	0	D
Stock Option (right to buy)	$52.30	4/7/2021		D			5600	⁽³⁾	4/17/2025	Common Stock	5600	⁽³⁾	0	D
Stock Option (right to buy)	$48.80	4/7/2021		D			9707	⁽³⁾	12/5/2025	Common Stock	9707	⁽³⁾	0	D
Stock Option (right to buy)	$46.545	4/7/2021		D			13562	⁽³⁾	12/4/2026	Common Stock	13562	⁽³⁾	0	D

Explanation of Responses:
(1)	Pursuant to the Agreement and Plan of Merger among Amphenol Corporation, Moon Merger Sub Corporation and the Company (the "Merger Agreement"), each unvested restricted stock unit became fully vested immediately prior to the effective time of the merger. Restricted stock units were then cancelled as of the effective time of the merger in exchange for the right to receive a cash payment equal to $58.50 multiplied by the number of shares subject to such restricted stock unit award, less any required withholding of taxes.
(2)	Cancelled pursuant to the Merger Agreement in exchange for the right to receive a cash payment equal to $58.50 multiplied by the number of shares, less any required withholding of taxes.
(3)	Pursuant to the Merger Agreement, each unvested stock option became fully vested and exercisable immediately prior to the effective time of the merger. Each stock option that was outstanding and unexercised as of the effective time of the merger and had an exercise price per share that was less than $58.50 was then cancelled and converted into the right to receive a cash payment equal to $58.50 minus the exercise price, multiplied by the number of shares issuable upon exercise of such stock option, less any required withholding of taxes.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Ross Brian T 14000 TECHNOLOGY DRIVE EDEN PRAIRIE, MN 55344			EVP & CFO

Signatures
/s/ Amanda Lorentz as attorney-in-fact for Brian T. Ross pursuant to Power of Attorney previously filed.		4/8/2021
^**Signature of Reporting Person		Date