Statement of Changes in Beneficial Ownership (4)

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
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OMB Number: 3235-0287
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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 ^* Cavanah Kevin S	2. Issuer Name and Ticker or Trading Symbol MATRIX SERVICE CO [ MTRX ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP Finance & CFO
(Last) (First) (Middle) 5100 EAST SKELLY DRIVE, SUITE 100	3. Date of Earliest Transaction (MM/DD/YYYY) 5/14/2021
(Street) TULSA, OK 74135 (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 ⁽¹⁾	5/14/2021		M⁽²⁾		9813	A	$10.19	117050	D
COMMON STOCK ⁽¹⁾	5/14/2021		S⁽²⁾		9813	D	$12.3714 ⁽³⁾	107237	D
COMMON STOCK ⁽¹⁾	5/14/2021		M⁽²⁾		7037	A	$10.19	114274	D
COMMON STOCK ⁽¹⁾	5/14/2021		S⁽²⁾		7037	D	$12.3714 ⁽³⁾	107237 ⁽⁴⁾	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)
INCENTIVE STOCK OPTION (RIGHT TO BUY) ⁽¹⁾	$10.19	5/14/2021		M ⁽²⁾			9813	⁽⁵⁾	11/17/2021	COMMON STOCK ⁽¹⁾	9813.0	⁽⁶⁾	0	D
NON-QUALIFIED STOCK OPTION (RIGHT TO BUY) ⁽¹⁾	$10.19	5/14/2021		M ⁽²⁾			7037	⁽⁵⁾	11/17/2021	COMMON STOCK ⁽¹⁾	7037.0	⁽⁶⁾	0	D

Explanation of Responses:
(1)	MATRIX SERVICE COMPANY COMMON STOCK.
(2)	OPTIONS WERE EXERCISED DUE TO UPCOMING EXPIRATION DATE COMBINED WITH LIMITED TRADING WINDOWS.
(3)	THE PRICE REPORTED IS A WEIGHTED AVERAGE PRICE. THESE SHARES WERE SOLD IN MULTIPLE TRANSACTIONS AT PRICES RANGING FROM $12.36 TO $12.42, INCLUSIVE. THE REPORTING PERSON UNDERTAKES TO PROVIDE TO MATRIX SERVICE COMPANY, ANY SECURITY HOLDER OF MATRIX SERVICE COMPANY, 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.
(4)	INCLUDES 73,950 SHARES OF MATRIX SERVICE COMPANY COMMON STOCK OWNED OUTRIGHT.
(5)	THE STOCK OPTION BECAME 100% EXERCISABLE ON THE THIRD ANNIVERSARY DATE OF THE GRANT.
(6)	NOT APPLICABLE.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Cavanah Kevin S 5100 EAST SKELLY DRIVE SUITE 100 TULSA, OK 74135			VP Finance & CFO