Mayville Engineering Company, Inc. (MEC) director reports stock sales, RSUs

Rhea-AI Filing Summary

Mayville Engineering Company, Inc. director Steven L. Fisher reported sales of company stock. On 12/11/2025 he sold 5,000 shares of common stock at $19.08 per share and another 5,000 shares at $19.14 per share, leaving him with 30,482 shares of directly held common stock.

He also reported 10,331 director restricted stock units tied to common stock, which vest 100% at the earlier of one year or the next annual shareholder meeting, and 39,900 director deferred stock units that will be settled in common stock upon his retirement or separation from the company.

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
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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^*

Fisher Steven L

(Last) (First) (Middle)

135 SOUTH 84TH STREET

SUITE 300

(Street)

MILWAUKEE WI 53214

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Mayville Engineering Company, Inc. [ MEC ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
12/11/2025

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

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. 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	12/11/2025		S		5,000	D	$19.08	35,482	D
Common Stock	12/11/2025		S		5,000	D	$19.14	30,482	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
Director Restricted Stock Units	$0							(1)	(1)	Common Stock	10,331		10,331	D
Director Deferred Stock Units	$0							(2)	(2)	Common Stock	39,900		39,900(2)	D

Explanation of Responses:

1. The restricted stock units will vest 100% at the earlier of one year or the next annual shareholder meeting.

2. The balance includes vested RSUs that were deferred by the reporting person, which will be settled upon the reporting person's retirement or separation from the company.

	/s/ Russell E. Ryba, Attorney-in-Fact for Steven L. Fisher	12/15/2025
	** 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.

FAQ

What insider stock transactions did MEC director Steven L. Fisher report?

Steven L. Fisher, a director of Mayville Engineering Company, Inc. (MEC), reported two sales of common stock on 12/11/2025: 5,000 shares at $19.08 per share and 5,000 shares at $19.14 per share.

How many MEC shares does Steven L. Fisher own after the reported transactions?

After the reported sales, Steven L. Fisher beneficially owns 30,482 shares of Mayville Engineering Company, Inc. common stock in direct form.

At what prices did Steven L. Fisher sell MEC common stock?

On 12/11/2025 Steven L. Fisher sold 5,000 MEC common shares at $19.08 per share and another 5,000 shares at $19.14 per share.

What restricted stock units in MEC does Steven L. Fisher hold?

Steven L. Fisher holds 10,331 director restricted stock units tied to Mayville Engineering common stock, which will vest 100% at the earlier of one year or the next annual shareholder meeting.

What are MEC director deferred stock units reported by Steven L. Fisher?

He reported 39,900 director deferred stock units, which represent rights to receive Mayville Engineering common stock and will be settled upon his retirement or separation from the company.

Is Steven L. Fisher the only reporting person in this MEC insider report?

Yes. The document indicates that the form is filed by one reporting person, and the signature is by an attorney-in-fact for Steven L. Fisher.