Sean P. Leuba is VP & Secretary at Mayville Engineering Company, Inc. (MEC). They have made 5 open-market trades across 1 company since 2024, most recently 2026-08-06.
CIK 0001962754
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
3 open-market purchases totalling $37K since 2024, against 2 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MEC | 6,633 | $106K |
Shares reported on the most recent Form 4, priced at the 2026-08-07 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MEC | SELL | 2026-08-06 | 2026-08-07 | $25.44 | $327K | -2.9% | -14.6% | — |
| MEC | SELL | 2026-03-05 | 2026-03-09 | $19.15 | $176K | -7.3% | +6.8% | +80.5% |
| MEC | BUY | 2025-08-11 | 2025-08-11 | $13.56 | $7K | -2.8% | +0.6% | +17.7% |
| MEC | BUY | 2025-03-06 | 2025-03-07 | $14.18 | $14K | -0.9% | -14.7% | +3.8% |
| MEC | BUY | 2024-11-07 | 2024-11-07 | $16.13 | $16K | -0.7% | +2.9% | -5.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.