SCHEDULE 13G

CUSIP No.

576853105

Names of Reporting Persons

HARVEY PARTNERS, LLC

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

Sec Use Only

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,221,762.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,221,762.00
8	Shared Dispositive Power 0.00

Aggregate Amount Beneficially Owned by Each Reporting Person

1,221,762.00

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in row (9)

4.4 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person: See Item 2 for additional information.

SCHEDULE 13G

Item 1.

(a)

Name of issuer:

Matrix Service Company

(b)

Address of issuer's principal executive offices:

15 East 5th Street Suite 1100 Tulsa, Oklahoma 74135

Item 2.

(a)

Name of person filing:

This report is being filed by Harvey Partners, LLC, a Delaware limited liability company (the "Reporting Person"). As of June 30, 2025, Harvey SMidCap Fund, LP, a Delaware limited partnership ("SMidCap Fund"), held 75,930 shares of Common Stock, par value $0.01 per share (the "Common Stock"), of Matrix Service Company (the "Company") and Harvey QP, LP, a Delaware limited partnership ("QP, LP"), held 44,187 shares of Common Stock. The Reporting Person is the investment manager of SMidCap Fund and QP, LP, and as such, possesses the sole power to vote and the sole power to direct the disposition of all securities of the Company held by SMidCap Fund and QP, LP. As of June 30, 2025, the Reporting Person held 1,101,645 shares of Common Stock in managed accounts. James A. Schwartz and Jeffrey C. Moskowitz, the Managing Members of the Reporting Person, share voting and investment power with respect to all securities beneficially owned by the Reporting Person. Based on the information set forth in the Quarterly Report on Form 10-Q of the Company filed with the Securities and Exchange Commission on May 8, 2025, there were 27,610,499 shares of the Company's Common Stock outstanding as of May 7, 2025. As a result of the foregoing, for purposes of Reg. Section 240.13d-3, the Reporting Person is deemed to beneficially own 1,221,762 shares of Common Stock, or 4.4% of the Common Stock deemed issued and outstanding as of June 30, 2025.

(b)

Address or principal business office or, if none, residence:

120 White Plains Road, Suite 430, Tarrytown, NY 10591

(c)

Citizenship:

Harvey Partners, LLC, a Delaware limited liability company.

(d)

Title of class of securities:

Common Stock, Par Value $0.01 per Share

(e)

CUSIP No.:

576853105

Item 3.

If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

(a)

Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);

(b)

Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);

(c)

Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);

(d)

Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);

(e)

An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);

(f)

An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);

(g)

A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h)

A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)

A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)

A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:

(k)

Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).

Item 4.

Ownership

(a)

Amount beneficially owned:

1,221,762

(b)

Percent of class:

4.4%

(c)

Number of shares as to which the person has:

(i) Sole power to vote or to direct the vote:

1,221,762

(ii) Shared power to vote or to direct the vote:

(iii) Sole power to dispose or to direct the disposition of:

1,221,762

(iv) Shared power to dispose or to direct the disposition of:

Item 5.

Ownership of 5 Percent or Less of a Class.

Ownership of 5 percent or less of a class

Item 6.

Ownership of more than 5 Percent on Behalf of Another Person.

Not Applicable

Item 7.

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.

Not Applicable

Item 8.

Identification and Classification of Members of the Group.

Not Applicable

Item 9.

Notice of Dissolution of Group.

Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

HARVEY PARTNERS, LLC

Signature:	/s/ Jeffrey C. Moskowitz
Name/Title:	Jeffrey C. Moskowitz, Managing Member
Date:	08/14/2025