Matrix Service grants Liane K. Hinrichs 10,325 stock units

Her reported directly held position after the award was 74,613 shares.

Available on EDGAR 11/04/2026 - 05:41 PM EST Accepted by SEC EDGAR 11/04/2026 - 05:41 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Matrix Service Co. director Liane K. Hinrichs acquired 10,325 restricted stock units on November 3, 2026. Each unit entitles her to one share of common stock if and when the restriction conditions are satisfied, and 100% of the grant will vest on the first anniversary date. Her reported directly held position after the transaction was 74,613 shares.

Insider Trade Summary

Grant/Award: 10,325 shares

Grant/Award 1 txn

Insider Hinrichs Liane K

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1	10,325	$0.00	$0.00

Holdings After Transaction: Common Stock — 74,613 shares (Direct)

Footnotes (1)

1. F1. Restricted Stock Unit - each unit will entitle the reporting person to one share of Matrix Service Company Common Stock if and when the conditions of the restriction have been satisfied. For this grant, 100% will vest on the first anniversary date.

Key Figures

Restricted stock units granted: 10,325 units Shares per restricted stock unit: 1 share per unit Grant vesting: 100% +1 more

4 metrics

Restricted stock units granted 10,325 units Award to director Liane K. Hinrichs on November 3, 2026

Shares per restricted stock unit 1 share per unit Each unit entitles the holder to one share if restriction conditions are satisfied

Grant vesting 100% Will vest on the first anniversary date, subject to restriction conditions

Direct holdings after transaction 74,613 shares Reported following the November 3, 2026 transaction

Key Terms

Restricted Stock Unit, vest, conditions of the restriction

3 terms

Restricted Stock Unit financial

"Restricted Stock Unit - each unit will entitle the reporting person to one share"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

vest financial

"100% will vest on the first anniversary date"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

conditions of the restriction financial

"if and when the conditions of the restriction have been satisfied"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many restricted stock units did Liane K. Hinrichs receive in MTRX?

Liane K. Hinrichs acquired 10,325 restricted stock units on November 3, 2026. Each unit entitles her to one share of Matrix Service Co. common stock if and when the restriction conditions are satisfied.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Hinrichs Liane K

(Last) (First) (Middle)

15333 JOHN F KENNEDY BOULEVARD

SUITE 400

(Street)

HOUSTON TEXAS 77032

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
MATRIX SERVICE CO [ MTRX ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
11/03/2026

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

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

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

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	11/03/2026		A		10,325(1)	A	$0	74,613	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

Explanation of Responses:

1. Restricted Stock Unit - each unit will entitle the reporting person to one share of Matrix Service Company Common Stock if and when the conditions of the restriction have been satisfied. For this grant, 100% will vest on the first anniversary date.

Remarks:

	Liane K. Hinrichs	11/04/2026
	** 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)