David Windley is Director at TENNANT CO (TNC). They have made 2 open-market trades across 1 company since 2024, most recently 2026-05-14.
CIK 0001667346
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.
0 open-market purchases, against 2 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| DHX | 343,786 | $1.7M |
| TNC | 8,912 | $582K |
| Total | $2.2M |
Shares reported on the most recent Form 4, priced at the 2026-05-18 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.