MATRIX SERVICE CO — Board/Management Information 2026

Jan 6, 2026

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

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FORM 8-K

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CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported) December 30, 2025

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Matrix Service Co mpany

(Exact Name of Registrant as Specified in Its Charter)

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Delaware	001-15461	73-1352174
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)

15 East 5th Street, Suite 1100 , Tulsa , Oklahoma 74103

(Address of principal executive offices and zip code)

918 - 838-8822

(Registrant’s Telephone Number, Including Area Code)

NOT APPLICABLE

(Former Name or Former Address, if Changed Since Last Report)

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Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions ( see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.01 per share	MTRX	NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected to not use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

On December 30, 2025, Mr. Douglas J. Montalbano notified Matrix Service Company (the “Company”) that he is resigning his position as President of Matrix North American Construction, Inc. (“Matrix NAC”), a union operating subsidiary of the Company, effective January 16, 2026. The resignation of Mr. Montalbano is not related to any dispute or disagreement with Matrix NAC, its clients, or the Company on any matter related to our operations, policies or practice. The role of President of Matrix NAC will be filled on an interim basis by a current employee and officer of Matrix NAC, who will report to Mr. Shawn Payne, President, Engineering & Construction of the Company.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

/s/ Kevin S. Cavanah
Kevin S. Cavanah
Vice President and Chief Financial Officer