Mary Kay Bourbulas is Director at Bank First Corp (BFC). They have made 7 open-market trades across 1 company since 2020, most recently 2026-03-06.
CIK 0001784888
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.
7 open-market purchases totalling $262K since 2020, never a sale. Across 7 scored buys the stock is up 7.5% at ninety days, and 3.1 points behind the S&P over the same stretch.
7 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| BFC | 8,126 | $1.2M |
Shares reported on the most recent Form 4, priced at the 2026-03-10 close.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 100% | 71% | 100% |
| Avg Move | +4.3% | +7.1% | +7.5% |
| Alpha | +1.8% | +4.5% | -3.1% |
| Scored | 7 | 7 | 7 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| BFC | BUY | 2024-03-15 | 2024-03-18 | $82.88 | $50K | +7.8% | -5.1% | +0.6% |
| BFC | BUY | 2021-02-04 | 2021-02-08 | $68.89 | $41K | +1.6% | +11.9% | +4.4% |
| BFC | BUY | 2021-01-26 | 2021-01-28 | $69.99 | $70K | +2.3% | +4.1% | +5.0% |
| BFC | BUY | 2020-11-24 | 2020-11-27 | $67.85 | $81K | +1.8% | -3.1% | +5.0% |
| BFC | BUY | 2020-05-19 | 2020-05-20 | $55.00 | $6K | +2.0% | +12.0% | +12.3% |
| BFC | BUY | 2020-05-18 | 2020-05-19 | $56.00 | $6K | +5.0% | +17.2% | +13.0% |
| BFC | BUY | 2020-05-15 | 2020-05-15 | $49.50 | $8K | +9.5% | +12.5% | +12.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.