Steven Alan Sonnenberg is Director at TENNANT CO (TNC). They have made 9 open-market trades across 1 company since 2015, most recently 2026-06-09.
CIK 0001335987
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 9 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| TNC | SELL | 2024-02-27 | 2024-02-29 | $110.09 | $2.0M | -0.8% | +9.2% | -11.1% |
| TNC | SELL | 2023-08-30 | 2023-08-31 | $83.24 | $294K | -7.8% | -10.2% | +3.1% |
| TNC | SELL | 2022-11-11 | 2022-11-15 | $46.59 | $216K | -4.7% | -8.1% | +4.0% |
| TNC | SELL | 2019-11-05 | 2019-11-07 | $78.49 | $672K | -4.5% | +1.2% | +3.8% |
| TNC | SELL | 2019-05-10 | 2019-05-14 | $65.31 | $295K | -6.9% | -3.9% | +7.1% |
| TNC | SELL | 2017-03-01 | 2017-03-02 | $72.16 | $332K | -1.6% | -0.6% | -1.3% |
| TNC | SELL | 2017-02-28 | 2017-03-02 | $72.17 | $433K | -1.6% | -0.6% | -1.3% |
| TNC | SELL | 2017-02-28 | 2017-03-02 | $72.19 | $101K | -1.6% | -0.6% | -1.3% |
| TNC | SELL | 2015-03-03 | 2015-03-05 | $64.88 | $226K | -4.9% | -2.7% | -2.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.