MEC (MEC) CEO reports RSU exercises, new award and tax withholding

Rhea-AI Filing Summary

Mayville Engineering Company, Inc. President & CEO Reddy Jagadeesh A reported equity compensation activity involving restricted stock units, stock options, and common shares. On March 15, 2026, he exercised restricted stock units that delivered 63,960 common shares at a conversion price of $0.00 per share and received a new award of 74,986 restricted stock units.

Following these transactions and related tax withholding of 30,062 common shares at $16.67 per share, his direct common stock holdings were 180,183 shares. He also holds a stock option covering 88,901 common shares at an exercise price of $16.22 per share, plus indirect holdings of common stock through an ESOP/401(k) plan and shares held by his daughter. The RSU footnotes state that different awards will vest in equal thirds on March 15 of 2025–2029, while the option vests in two tranches on February 28, 2024 and February 28, 2025.

Insights

Equity compensation analyst

CEO activity reflects routine RSU vesting, new grants, and tax withholding, not open-market trading.

The filing shows Reddy Jagadeesh A exercising restricted stock units into 63,960 common shares at $0.00 per share and receiving 74,986 new restricted stock units. These are compensation-related events rather than market purchases or sales, so they carry limited trading signal.

A tax-withholding disposition of 30,062 common shares at $16.67 per share reduced the net increase in his direct holdings, which ended at 180,183 common shares. He also retains a stock option over 88,901 common shares at $16.22 per share and indirect holdings through an ESOP/401(k) plan and his daughter, indicating a continued sizable equity stake after the transactions.

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

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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^*

Reddy Jagadeesh A

(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
X	Officer (give title below)		Other (specify below)
	President & CEO

3. Date of Earliest Transaction (Month/Day/Year)
03/15/2026

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	03/15/2026		M		36,317	A	$0	182,602	D
Common Stock	03/15/2026		M		27,643	A	$0	210,245	D
Common Stock	03/15/2026		F		30,062	D	$16.67	180,183	D
Common Stock								2,300(1)	I	by ESOP and/or 401(k) Plan
Common Stock								380	I	By Daughter

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
Restricted Stock Units	$0	03/15/2026		M			36,317	(2)	(2)	Common Shares	36,317	$0	36,316	D
Restricted Stock Units	$0	03/15/2026		M			27,643	(3)	(3)	Common Shares	27,643	$0	55,284	D
Restricted Stock Units	$0	03/15/2026		A		74,986		(4)	(4)	Common Shares	74,986	$0	74,986	D
Stock Option (right to buy)	$16.22							(5)	(5)	Common Shares	88,901		88,901	D

Explanation of Responses:

1. Reflects the most recent ESOP and 401(k) balance.

2. The restricted stock units will vest 1/3 on each of March 15, 2025, 2026 and 2027.

3. The restricted stock units will vest 1/3 on each of March 15, 2026, 2027 and 2028.

4. The restricted stock units will vest 1/3 on each of March 15, 2027, 2028 and 2029.

5. The options will vest 50% on each of February 28, 2024 and February 28, 2025.

	Garrett F. Bishop, Attorney-in-Fact for Jagadeesh A. Reddy	03/17/2026
	** 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).
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FAQ

What insider transactions did MEC CEO Reddy Jagadeesh report on this Form 4?

He exercised restricted stock units for 63,960 common shares at $0.00 per share, received a new grant of 74,986 restricted stock units, and had 30,062 common shares withheld to cover tax obligations at $16.67 per share.

How many Mayville Engineering (MEC) shares does the CEO hold after these transactions?

After the reported transactions, the CEO directly holds 180,183 shares of MEC common stock. He also has indirect ownership of 2,300 shares via an ESOP/401(k) plan and 380 shares held by his daughter, according to the holdings data disclosed.

What restricted stock unit grants are disclosed for MEC CEO Reddy Jagadeesh?

The filing discloses a new award of 74,986 restricted stock units and remaining balances from prior grants. Footnotes state these RSUs vest in three equal installments each year on March 15 from 2025 through 2029, subject to the award terms.

How are the Mayville Engineering CEO’s stock options structured in this Form 4?

He holds a stock option over 88,901 MEC common shares with an exercise price of $16.22 per share. A footnote explains the option vests in two equal tranches on February 28, 2024 and February 28, 2025, providing future exercise flexibility.

Was the MEC CEO’s Form 4 transaction an open-market stock sale or purchase?

No open-market trades are reported. The activity involves RSU exercises at $0.00 per share, a new RSU grant, and a tax-withholding disposition of 30,062 shares at $16.67 per share, which satisfies tax obligations rather than reflecting discretionary buying or selling.

How many shares were withheld for taxes in the MEC CEO’s Form 4 filing?

The filing shows 30,062 MEC common shares disposed of at $16.67 per share under transaction code F. This represents shares withheld by the issuer to pay the CEO’s tax liability related to equity compensation, not an open-market stock sale.