Sarah R. Opperman is Director at ISABELLA BANK CORP (ISBA). They have made 86 open-market trades across 1 company since 2014, most recently 2026-06-01.
CIK 0001554598
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.
86 open-market purchases totalling $383K since 2014, never a sale. Across 86 scored buys the stock is down 0.3% at ninety days, and 2.2 points behind the S&P over the same stretch.
86 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| ISBA | 24,514 | $1.0M |
Shares reported on the most recent Form 4, priced at the 2026-06-03 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 99% | 0% | 0% |
| Avg Move | +2.3% | -0.2% | -0.3% |
| Alpha | -113.4% | -1.0% | -2.2% |
| Scored | 86 | 86 | 86 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ISBA | BUY | 2026-01-20 | 2026-01-23 | $49.64 | $14K | -2.4% | -3.4% | -13.3% |
| ISBA | BUY | 2025-01-24 | 2025-01-28 | $25.85 | $14K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2024-03-11 | 2024-03-13 | $18.96 | $4K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2024-01-29 | 2024-01-31 | $21.48 | $14K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2023-05-10 | 2023-05-12 | $19.92 | $3K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2023-05-09 | 2023-05-11 | $19.98 | $2K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2023-05-05 | 2023-05-09 | $20.99 | $6K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2023-01-27 | 2023-02-02 | $22.96 | $15K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2022-10-27 | 2022-10-31 | $22.63 | $1K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2022-07-29 | 2022-08-01 | $23.94 | $1K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2022-05-09 | 2022-05-09 | $24.05 | $7K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2022-04-29 | 2022-05-03 | $24.90 | $6K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2022-02-25 | 2022-02-28 | $25.59 | $9K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2022-01-26 | 2022-01-28 | $25.24 | $1K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2021-12-31 | 2022-01-04 | $25.64 | $4K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2021-11-29 | 2021-12-01 | $28.00 | $11K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2021-11-18 | 2021-11-19 | $27.30 | $8K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2021-11-11 | 2021-11-15 | $28.50 | $6K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2021-10-28 | 2021-11-01 | $26.78 | $1K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2021-07-30 | 2021-08-03 | $23.03 | $1K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2021-05-04 | 2021-05-04 | $24.99 | $150 | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2021-04-29 | 2021-04-30 | $24.99 | $150 | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2021-04-22 | 2021-04-26 | $23.76 | $2K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2021-01-25 | 2021-01-27 | $20.74 | $2K | +2.4% | -0.2% | -0.2% |
| ISBA | BUY | 2020-10-30 | 2020-11-03 | $16.13 | $2K | +2.4% | -0.2% | -0.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.