[SCHEDULE 13G] Mayville Engineering Company, Inc. SEC Filing

Rhea-AI Filing Summary

Mayville Engineering Company, Inc. (MEC): Schedule 13G discloses that Hilve Holdings Ltd and Mikhail Stiskin beneficially own 1,067,170 shares of MEC common stock, representing 5.3% of the class. Each reports sole voting and dispositive power over the same 1,067,170 shares, with no shared power.

The percentage is calculated based on 20,317,825 shares outstanding as of August 1, 2025, as cited from MEC’s Form 10-Q. Stiskin, as the sole shareholder of Hilve Holdings Ltd, may be deemed the beneficial owner of the shares held by Hilve Holdings. The filing includes a standard certification that the securities were not acquired for the purpose of changing or influencing control.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Mayville Engineering Company, Inc.

(Name of Issuer)

Common Stock, no par value

(Title of Class of Securities)

578605107

(CUSIP Number)

10/27/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 578605107

1

Names of Reporting Persons

Hilve Holdings Ltd

2

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

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CYPRUS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,067,170.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,067,170.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,067,170.00

10

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

11

Percent of class represented by amount in row (9)

5.3 %

12

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13G

CUSIP No. 578605107

1

Names of Reporting Persons

Mikhail Stiskin

2

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

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

ISRAEL

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,067,170.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,067,170.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,067,170.00

10

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

11

Percent of class represented by amount in row (9)

5.3 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Mayville Engineering Company, Inc.
(b)	Address of issuer's principal executive offices: 715 SOUTH STREET, MAYVILLE, WISCONSIN, 53050
Item 2.
(a)	Name of person filing: (i) Hilve Holdings Limited and (ii) Mikhail Stiskin (collectively, the "Reporting Persons").
(b)	Address or principal business office or, if none, residence: (i) For Hilve Holdings Ltd.: Spyrou Araouzou, 25, Beregaria 25, 5th Floor, Office 2, 3036, Limassol, Republic of Cyprus, and (ii) For Mikhail Stiskin: Onisilou, 8A, Rita Court 1, Block B, Flat/Office 208, Agios Tychonas, 4532, Limassol, Republic of Cyprus.
(c)	Citizenship: (i) Hilve Holdings Limited was established under the laws of the Republic of Cyprus, and (ii) Mikhail Stiskin is a citizen of Israel.
(d)	Title of class of securities: Common Stock, no par value
(e)	CUSIP No.: 578605107
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: Hilve Holdings Limited directly holds 1,067,170 shares of Common Stockб of no par value ("Common Stock"), of Mayville Engineering Company, Inc. (the "Issuer"). Mikhail Stiskin, as the sole shareholder of Hilve Holdings Limited, may be deemed the beneficial owner of 1,067,170 shares of Common Stock held by Hilve Holdings Limited.
(b)	Percent of class: Hilve Holdings Limited may be deemed the beneficial owner of 5.3% of the outstanding shares of Common Stock of the Issuer. Mikhail Stiskin may be deemed the beneficial owner of 5.3% of the outstanding shares of Common Stock. Such percentages are based on 20,317,825 shares of Common Stock of the Issuer outstanding as of August 1, 2025, as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission on August 6, 2025.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: As of the date hereof, Hilve Holdings Limited has the sole power to vote or to direct the vote of 1,067,170 shares of Common Stock of the Issuer. Mikhail Stiskin, as the sole shareholder of Hilve Holdings Limited, has the sole power to vote or to direct the vote of 1,067,170 shares of Common Stock of the Issuer.
	(ii) Shared power to vote or to direct the vote: As of the date hereof, each of the Reporting Persons has shared power to vote or direct the vote of 0 shares of Common Stock of the Issuer.
	(iii) Sole power to dispose or to direct the disposition of: As of the date hereof, Hilve Holdings Limited has the sole power to dispose or to direct the disposition of 1,067,170 shares of Common Stock of the Issuer. Mikhail Stiskin has the sole power to dispose or to direct the disposition of 1,067,170 shares of Common Stock of the Issuer.
	(iv) Shared power to dispose or to direct the disposition of: As of the date hereof, each of the Reporting Persons has shared power to dispose or to direct the disposition of 0 shares of Common Stock of the Issuer.
Item 5.	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 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.

Hilve Holdings Ltd

Signature:	/s/ Asya Andreeva
Name/Title:	Director
Date:	10/29/2025

Mikhail Stiskin

Signature:	/s/ Mikahil Stiskin
Name/Title:	self
Date:	10/29/2025

FAQ

What stake in MEC does Hilve Holdings report on Schedule 13G?

Hilve Holdings Ltd reports beneficial ownership of 1,067,170 shares of MEC common stock, or 5.3% of the class.

How is Mikhail Stiskin related to the MEC shares reported?

As the sole shareholder of Hilve Holdings Ltd, Mikhail Stiskin may be deemed the beneficial owner of the same 1,067,170 shares.

What is the outstanding share count used to compute the 5.3%?

The filing cites 20,317,825 shares outstanding as of August 1, 2025, from MEC’s Form 10-Q.

Do the reporting persons have sole or shared voting power?

Each reports sole voting and dispositive power over 1,067,170 shares and no shared power.

Is this a passive investment under Schedule 13G?

Yes. The certification states the securities were not acquired to change or influence control of the issuer.