Mayville Engineering Company, Inc. Form 4 Filings

Mayville Engineering Company, Inc. President & CEO Jagadeesh A. Reddy reported an open-market sale of 15,688 shares of common stock at a weighted average price of $35.0474 per share, with prices ranging from $35.00 to $35.28. The transaction was carried out under a pre-arranged Rule 10b5-1 trading plan adopted on December 12, 2025. Following the sale, he directly holds 124,105 common shares and maintains indirect interests of 380 shares held by his daughter and 2,300 shares through an ESOP and/or 401(k) plan. He also retains significant equity exposure through stock options on 88,901 shares at an exercise price of $16.22 and multiple tranches of restricted stock units covering additional common shares.

Mayville Engineering Company, Inc. President & CEO Jagadeesh A. Reddy reported an open-market sale of 1,300 shares of MEC common stock at a weighted average price of about $35.01 per share on June 8, 2026. The sale was made under a pre-arranged Rule 10b5-1 trading plan adopted on December 12, 2025, meaning the trades were scheduled in advance.

After this sale, he directly holds 139,793 MEC common shares. He also has indirect holdings of 380 shares held by his daughter and 2,300 shares through an ESOP and/or 401(k) plan. In addition, he retains stock options covering 88,901 common shares at an exercise price of $16.22, plus several restricted stock unit awards tied to 74,986, 55,284 and 36,317 underlying common shares that vest in equal annual installments between March 15, 2025 and March 15, 2029.

Mayville Engineering Company, Inc. President & CEO Jagadeesh A. Reddy filed an amended insider report showing he sold 17,294 shares of common stock on June 1, 2026 at a weighted average price of $30.0001 per share. The sale was executed under a pre-arranged Rule 10b5-1 trading plan adopted on December 12, 2025.

The amendment corrects an earlier report that had stated 17,942 shares were sold and adjusts the number of shares beneficially owned after the transaction. Following the sale, Reddy directly held 141,093 common shares, plus indirect holdings of 380 shares by his daughter and 2,300 shares through an ESOP and 401(k) plan.

Reddy also retained equity incentives, including stock options representing 88,901 underlying common shares at an exercise price of $16.22, and several tranches of restricted stock units covering 74,986, 55,284 and 36,317 underlying common shares that vest in annual installments on March 15 from 2025 through 2029.

Mayville Engineering Company, Inc. President & CEO Jagadeesh A. Reddy reported an open-market sale of 17,942 shares of common stock at a weighted average price of $30.0001 per share on June 1, 2026. The sale was executed under a pre-arranged Rule 10b5-1 trading plan adopted on December 12, 2025, indicating it was scheduled in advance. Following this transaction, he directly holds 140,445 common shares and also has stock options for 88,901 shares at an exercise price of $16.22 plus multiple restricted stock unit grants tied to future vesting dates.

Mayville Engineering Company, Inc. executive Ryan F. Raber, EVP – Strategy, Sales & Marketing, reported an open-market sale of 20,000 shares of Common Stock at $26.00 per share on May 26, 2026.

After this transaction, he directly owns 86,970 shares of Common Stock. He also has 26,287 shares held indirectly through the ESOP and 401(k) plan, plus multiple equity awards, including restricted stock units tied to 29,155, 12,452 and 17,650 underlying shares of Common Stock and stock options covering 44,720, 77,426, 43,291 and 27,595 underlying shares at exercise prices ranging from $10.32 to $17.00 per share.

Mayville Engineering Company, Inc. senior vice president Craig D. Nichols reported an open-market sale of Common Stock. He sold 4,000 shares on May 21, 2026 at $23.24 per share and now holds 146 Common shares directly.

In addition to direct stock, Nichols holds company equity through benefit and incentive arrangements. A 401(k) plan account holds 1,134 Common shares indirectly. He also holds Restricted Stock Units that may convert into 14,998 Common shares, vesting one-third on each of March 15, 2026, 2027 and 2028, and another RSU award for 11,614 underlying shares vesting one-third on each of March 15, 2027, 2028 and 2029.

Mayville Engineering Company, Inc. senior vice president, general counsel and secretary Sean P. Leuba reported a bona fide gift of 1,015 shares of common stock on May 8, 2026. After the gift, he directly holds 19,488 common shares.

He also holds a stock option linked to 21,552 common shares at an exercise price of $16.22 per share, expiring February 28, 2033. In addition, he has multiple restricted stock unit awards covering 13,498, 9,292 and 7,263 underlying shares of common stock, which vest in equal annual installments on specified March 15 vesting dates from 2025 through 2029.

Mayville Engineering Company, Inc. President & CEO Jagadeesh A. Reddy reported open-market sales of company stock. On May 7, 2026, he sold 11,464 common shares at a weighted average price of $26.11 and 10,332 shares at a weighted average price of $25.72, totaling 21,796 shares. These transactions were carried out under a pre-arranged Rule 10b5-1 trading plan adopted on December 12, 2025. After the reported sales, one line in the filing shows direct ownership of 158,387 common shares, alongside stock options and restricted stock units that may convert into additional shares over time.

Mayville Engineering Company, Inc. director Tania Wingfield reported compensation-related equity activity. On April 21, 2026, she exercised 5,949 Director Restricted Stock Units into 5,949 shares of Common Stock, leaving her with 5,949 common shares held directly.

On the same date, she received a new grant of 5,959 Director Restricted Stock Units, each representing one share of Common Stock. According to the footnotes, the RSUs that were exercised had vested 100% one year from their grant date, while the newly granted RSUs will vest 100% at the earlier of one year or the next annual shareholder meeting. No open-market purchases or sales were reported in this filing.

Schyvinck Christine M. reported acquisition or exercise transactions in this Form 4 filing.

Mayville Engineering Company, Inc. reported that board chair and director Christine M. Schyvinck received a grant of 5,959 Director Restricted Stock Units. These units relate to an equal number of shares of common stock and were awarded as compensation, with no cash paid per unit.

According to the disclosure, the restricted stock units will vest 100% at the earlier of one year or the next annual shareholder meeting. After this grant, Schyvinck holds 5,959 director restricted stock units directly, reflecting a routine equity-based compensation award rather than an open-market share purchase or sale.

Mayville Engineering Company, Inc. director Jay O. Rothman reported updated equity holdings. He received a grant of 5,959 Director Deferred Stock Units, each tied to an equivalent number of common shares. These units are part of his director compensation and were acquired at a stated price of $0.00 per unit.

After this award, Rothman holds 71,451 Director Deferred Stock Units and 24,721 shares of common stock directly. According to the disclosure, the deferred balance includes vested restricted stock units (RSUs) that he chose to defer, which will be settled in shares when he retires or separates from the company.

Mayville Engineering Company director Robert L. McCormick reported routine equity compensation activity. He exercised director restricted stock units covering 10,331 shares of Common Stock, resulting in direct ownership of 29,078 Common shares after the transaction.

On the same date, he received a grant of 5,959 Director Restricted Stock Units, each representing a right to receive one share of Common Stock. Footnotes state that some restricted stock units vest 100% one year from the grant date or at the earlier of one year or the next annual shareholder meeting.

Kent Jennifer J. reported acquisition or exercise transactions in this Form 4 filing.

Mayville Engineering Company, Inc. director Jennifer J. Kent reported a compensation-related equity change. She received a grant of 5,959 Director Deferred Stock Units, each corresponding to one share of common stock, at a stated price of $0.0000 per unit.

These deferred units will be settled in common stock upon her retirement or separation from the company, and the balance includes vested RSUs that she has chosen to defer. After these updates, she holds 24,982 shares of common stock directly and 30,775 deferred stock units linked to common stock.

Mayville Engineering Company, Inc. director Steven L. Fisher reported exercises and conversions of director deferred stock units and director restricted stock units into common stock on April 21, 2026. These derivative transactions covered a total of 50231 underlying shares and resulted in acquisitions of an equivalent number of common shares, with no reported market sales.

Mayville Engineering Company, Inc. director Timothy L. Christen reported routine equity compensation transactions. He exercised 12,397 Director Restricted Stock Units into Common Stock at an exercise price of $0, increasing his direct holdings to 153,804 Common Shares. The exercised restricted stock units had vested 100% one year from their grant date.

Christen also received a new grant of 7,150 Director Restricted Stock Units, each representing a right to receive one share of Common Stock. These new units will vest 100% at the earlier of one year from grant or the next annual shareholder meeting.

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.

Mayville Engineering Company EVP Ryan F. Raber reported multiple equity compensation moves on March 15, 2026. He exercised restricted stock units into 30,102 shares of Common Stock in two tranches of 17,650 and 12,452 shares. To cover tax obligations, 14,150 shares of Common Stock were withheld at $16.67 per share, a non-market disposition.

Raber also received a new grant of 29,155 restricted stock units, scheduled to vest in thirds on March 15 of 2027, 2028, and 2029. Following these transactions, he directly holds 106,970 Common shares, plus 26,287 shares indirectly through an ESOP and 401(k) plan. He continues to hold several stock option awards with exercise prices between $10.32 and $17.00 per share and expiration dates from 2029 to 2033.

Mayville Engineering Company SVP Craig D. Nichols reported routine equity compensation activity. Nichols exercised restricted stock units into 5,808 shares of common stock, with 1,662 of those shares withheld at $16.67 per share to cover tax obligations, leaving 4,146 shares held directly. He also received a new award of 14,998 restricted stock units. Footnotes state the restricted stock units vest in three equal annual installments on March 15 of 2026, 2027 and 2028, and in a separate three-year schedule on March 15 of 2027, 2028 and 2029. Nichols additionally has 1,134 shares held indirectly through a 401(k) plan.

Mayville Engineering Company, Inc. senior vice president Sean P. Leuba reported compensation-related equity activity involving restricted stock units and common stock on March 15, 2026. He exercised restricted stock units to acquire 11,909 shares of common stock at a conversion price of $0.00 per share.

To cover tax obligations, 5,277 common shares were disposed of at $16.67 per share through share withholding, rather than an open‑market sale. He also received a new grant of 13,498 restricted stock units, and held 18,473 common shares directly after the transactions. A stock option award remains outstanding for 21,552 underlying shares at an exercise price of $16.22 per share, expiring on February 28, 2033. Footnotes state the restricted stock units vest in equal annual installments across 2025–2029, and the options vest 50% on each of February 28, 2024 and February 28, 2025.

Mayville Engineering Company Chief Financial Officer Rachele Marie Lehr reported compensation-related equity transactions. On March 15, 2026, she exercised restricted stock units into 14,368 shares of common stock through two conversions of 8,560 and 5,808 units, at a stated price of $0.00 per unit.

She also received a new grant of 16,497 restricted stock units, which will vest in three equal installments on March 15, 2027, 2028 and 2029. To cover tax obligations, 4,600 shares of common stock were withheld at $16.67 per share.

After these transactions, Lehr directly holds 30,529 shares of common stock and 16,497 restricted stock units. She also has a stock option outstanding for 24,814 shares of common stock at an exercise price of $14.12 per share, expiring on February 28, 2033.

Mayville Engineering Company, Inc. insider Sean P. Leuba, the company’s GC & Secretary, reported open-market sales of company stock on March 5, 2026. He sold 2,500 shares of common stock indirectly through an ESOP/401(k) at $20.07 per share and 6,698 shares directly at $18.81 per share, for total reported sales of 9,198 shares.

After these transactions, Leuba directly holds 11,841 common shares and maintains equity awards, including 14,526 and 13,938 restricted stock units that vest in annual thirds through March 2027 and March 2028, and 21,552 stock options that vest in two equal installments on February 28, 2024 and 2025.

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.

Mayville Engineering Company, Inc. (MEC) executive vice president of strategy, sales and marketing Ryan F. Raber reported open-market sales of company stock. On 11/25/2025, he sold 12,500 shares of common stock at $16.69 per share and 2,500 shares at $16.625 per share.

After these transactions, Raber beneficially owns 91,018 MEC shares directly and 26,287 shares indirectly through an ESOP and/or 401(k) plan. He also holds multiple stock option and restricted stock unit awards that provide additional potential exposure to MEC shares over future vesting dates.

Mayville Engineering Company (MEC) SVP, Operations & Supply Chain reported insider activity on a Form 4. On 11/06/2025, the reporting person indirectly acquired 1,134 shares of common stock at $15.95 per share through a 401(k) plan.

The filing also lists 17,422 restricted stock units (RSUs), which are scheduled to vest in three equal installments on March 15, 2026, March 15, 2027, and March 15, 2028.

Mayville Engineering Company (MEC) director reports equity grant. Director Tania Wingfield filed a Form 4 showing an acquisition of 5,949 Director Restricted Stock Units on 11/07/2025 at $0. Each unit corresponds to one share of common stock, for a total underlying 5,949 shares.

The filing states the RSUs will vest 100% at the earlier of one year or the next annual shareholder meeting. Following the reported transaction, 5,949 derivative securities were beneficially owned on a direct basis.