Nichols Craig D 4

What Happened
Craig D. Nichols, Senior Vice President, Operations & Supply Chain at Mayville Engineering Company, sold 4,000 shares of MEC stock in an open-market sale on May 21, 2026. The shares were sold at $23.24 each for a total proceeds of $92,960. This was a sale (S) — common insider selling and not a purchase signal.

Key Details

• Transaction date and price: May 21, 2026 — 4,000 shares sold at $23.24 per share (total $92,960).
• Transaction type: Sale (open market/private sale indicated on the Form 4).
• Shares owned after the transaction: Not specified in the information provided.
• Filing timeliness: Form 4 filed May 26, 2026; filing date falls on the next business day after the Memorial Day holiday (May 25, 2026), so the report appears to be filed within the SEC’s two-business-day window.
• Footnotes on the filing:
  • F1: Restricted stock units vest 1/3 on each of March 15, 2026, 2027 and 2028.
  • F2: Restricted stock units vest 1/3 on each of March 15, 2027, 2028 and 2029. These footnotes describe previously granted RSUs and their vesting schedules (they are not the shares sold).

Context
Insider sales are common and can be for many reasons (personal liquidity, diversification, tax needs) and do not by themselves indicate company performance. Purchases are generally considered more informative about insider confidence. This Form 4 shows a routine sale by an executive; no options exercise, gift, or 10b5-1 plan was indicated in the provided details.