Mayville Engineering Company, Inc.
A contract manufacturer that fabricates, welds, coats, and assembles metal parts and components for big-name OEMs across trucks, construction, powersports, agriculture, and the military. Founded in 1945 by Mayville natives Ted Bachhuber and his uncle Leo in a rented garage behind a Main Street alley in Wisconsin, its first letterhead read "Tools, Dies, and Special Machinery." Today it ranks as one of the largest U.S. fabricators—and it also makes shotshell reloaders under the MEC Outdoors brand.
Granted 344.2K · Bought 109.5K
Granted 254.4K · Bought 23.7K
Granted 83.8K · Bought 70.0K
Granted 247.3K · Bought 42.4K · Sold 56.1K
Granted 247.9K · Bought 2.5K · Sold 56.5K
Granted 46.1K · Bought 35.0K
Granted 64.9K · Bought 10.0K
Granted 55.7K
Granted 18.9K · Sold 11.9K
Granted 75.2K · Bought 15.5K · Sold 10.0K
Bought 2.0K
Granted 40.6K · Bought 2.9K
Granted 29.1K
Granted 25.0K
Granted 9.7K · Bought 15.0K
Granted 43.1K · Bought 2.5K · Sold 9.2K
Granted 5.9K · Bought 2.5K
Granted 5.9K
Granted 5.9K · Bought 10.0K · Sold 10.0K
Granted 6.9K · Sold 4.0K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Kamphuis Robert DChairman, Pres. & CEO, Director · 12 transactions | — | 1.00Mas of Mar 2022 | 344.2K | 109.5K | — |
| Butz Todd MChief Financial Officer · 25 transactions | — | 379.1Kas of Mar 2025 | 254.4K | 23.7K | — |
| Christen Timothy LDirector · 15 transactions | — | 153.8K | 83.8K | 70.0K | — |
| Reddy Jagadeesh APresident & CEO, Director · 27 transactions | — | 126.8K | 247.3K | 42.4K | 56.1K |
| Raber Ryan FEVP - Strategy, Sales & Mktg · 27 transactions | — | 113.3K | 247.9K | 2.5K | 56.5K |
| Michels Patrick DDirector · 6 transactions | — | 81.1Kas of Apr 2023 | 46.1K | 35.0K | — |
| Carlson Allen JDirector · 8 transactions | — | 74.9Kas of Apr 2025 | 64.9K | 10.0K | — |
| Stille Randall PChief Operating Officer · 8 transactions | — | 70.8Kas of Mar 2023 | 55.7K | — | — |
| Welak Eric JEVP - Fabrication · 6 transactions | — | 57.5Kas of Mar 2021 | 18.9K | — | 11.9K |
| Fisher Steven LDirector · 12 transactions | — | 55.9K | 75.2K | 15.5K | 10.0K |
| Sanderson Clifford OVice President - HR · 4 transactions | — | 41.7Kas of Mar 2020 | — | 2.0K | — |
| Lehr Rachele MarieChief Financial Officer · 11 transactions | — | 30.5K | 40.6K | 2.9K | — |
| McCormick Robert LDirector · 3 transactions | — | 29.1K | 29.1K | — | — |
| Kent Jennifer J.Director · 3 transactions | — | 25.0K | 25.0K | — | — |
| Rothman Jay O.Director · 3 transactions | — | 24.7K | 9.7K | 15.0K | — |
| Leuba Sean PSVP, GC & Secretary · 19 transactions | — | 19.5K | 43.1K | 2.5K | 9.2K |
| St. Peter John ADirector · 3 transactions | — | 8.4Kas of May 2020 | 5.9K | 2.5K | — |
| Wingfield TaniaDirector · 1 transaction | — | 5.9K | 5.9K | — | — |
| Johnson Craig EDirector · 7 transactions | — | 5.9Kas of Apr 2021 | 5.9K | 10.0K | 10.0K |
| Nichols Craig DSVP, Operations & Supply Chain · 4 transactions | — | 1.3K | 6.9K | — | 4.0K |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over all recorded history: +185.9K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.