David W. Huml is CEO & President at TENNANT CO (TNC). They have made 10 open-market trades across 1 company since 2018, most recently 2026-03-06.
CIK 0001624242
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.
1 open-market purchase totalling $258K since 2026, against 9 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| TNC | 72,930 | $4.8M |
Shares reported on the most recent Form 4, priced at the 2026-03-10 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 |
|---|---|---|---|---|---|---|---|---|
| TNC | BUY | 2026-02-26 | 2026-03-02 | $64.39 | $258K | +2.2% | +11.8% | +38.2% |
| TNC | SELL | 2024-03-04 | 2024-03-05 | $110.79 | $4.3M | +4.8% | +11.2% | -7.8% |
| TNC | SELL | 2023-08-14 | 2023-08-16 | $83.83 | $771K | +0.6% | -6.0% | +3.4% |
| TNC | SELL | 2021-05-10 | 2021-05-11 | $86.32 | $862K | -0.3% | -1.4% | -11.8% |
| TNC | SELL | 2020-12-07 | 2020-12-09 | $69.29 | $34K | -0.9% | +1.7% | +11.3% |
| TNC | SELL | 2019-12-04 | 2019-12-06 | $79.06 | $40K | -0.2% | +1.3% | -6.6% |
| TNC | SELL | 2019-11-14 | 2019-11-18 | $70.10 | $30K | -0.2% | +5.1% | +13.1% |
| TNC | SELL | 2018-09-06 | 2018-09-10 | $75.15 | $2.0M | -0.6% | -7.9% | -25.6% |
| TNC | SELL | 2018-08-08 | 2018-08-10 | $79.57 | $1.0M | +0.5% | -3.0% | -19.8% |
| TNC | SELL | 2018-05-01 | 2018-05-01 | $72.99 | $30K | -1.4% | +7.7% | +9.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.