Isabella Bank Corp (Nasdaq: ISBA), an SEC filer in State Commercial Banks, closed at $39.44, +2.3%, on 2026-08-28, with a market cap of $294M as of 2026-08-27, a trailing P/E of 15.1, a return on equity of 8.6%, a net margin of 24.1% and 3-year sales growth of 1.9%. Institutional ownership, earnings history and filed financials are on the tabs below.
Returns use ADJUSTED closes (splits + dividends).
Volume as VALUE TRADED — close × volume, in USD.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | ISBA | SPY | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 · ytd | −3.6% | −1.3% | −3.4% | −12.8% | +2.4% | −2.5% | +0.5% | −0.7% | — | — | — | — | −20.1% | +13.4% | −33.5pp |
| 2025 | −0.7% | −3.3% | −4.3% | +10.2% | +5.7% | +10.7% | +2.3% | +9.3% | +5.4% | +1.4% | +17.5% | +19.7% | +99.1% | +17.7% | +81.3pp |
| 2024 | +0.2% | −9.7% | +1.2% | −7.2% | +4.3% | −1.6% | +9.5% | −3.8% | +12.1% | +2.1% | +15.0% | +5.6% | +27.7% | +24.9% | +2.9pp |
| 2023 | −2.1% | +5.7% | +3.3% | −5.8% | −10.0% | −1.3% | +0.3% | −2.2% | +6.2% | −1.9% | −3.8% | +9.8% | −3.5% | +26.2% | −29.7pp |
| 2022 | −2.0% | +1.6% | +2.9% | −4.3% | +0.0% | +2.4% | −4.2% | −1.3% | −7.6% | −0.7% | +6.8% | +4.8% | −2.4% | −18.2% | +15.8pp |
| 2021 | +4.8% | +1.0% | +6.4% | +5.5% | +0.2% | +1.2% | +0.2% | +2.0% | +11.9% | +1.6% | +5.9% | −8.0% | +36.3% | +28.7% | +7.5pp |
| 2020 | −0.2% | −1.4% | −23.5% | −3.3% | −5.2% | +12.3% | −9.3% | −1.5% | +4.4% | −3.8% | +21.7% | +1.2% | −14.3% | +18.3% | −32.7pp |
| 2019 | +2.0% | +4.3% | +0.1% | −6.1% | +2.5% | +2.9% | −3.0% | −2.2% | +2.3% | +2.9% | +5.9% | +1.1% | +12.7% | +31.2% | −18.5pp |
| 2018 | −2.6% | −1.1% | +1.7% | −1.5% | −1.3% | +0.0% | +0.2% | +3.0% | −1.8% | −6.5% | −1.4% | −7.6% | −17.8% | −4.6% | −13.2pp |
| 2017 | +0.0% | −0.3% | +0.2% | +0.2% | +1.1% | +0.2% | +0.2% | +2.0% | +2.3% | −0.7% | −1.0% | −0.9% | +3.3% | +21.7% | −18.4pp |
Month-end over prior month-end; a blank cell is no return.
Basis. Both columns share one basis, so Δ is like-for-like.
End-of-day closes; a “ytd” or “part” year is not a full year.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Years ⓘ | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 10 | 10 | 10 | 10 |
| Positive ⓘ | 40% | 40% | 70% | 30% | 60% | 70% | 70% | 45% | 80% | 40% | 70% | 70% |
| Median | −0.5% | −0.7% | +0.7% | −3.8% | +0.7% | +0.7% | +0.2% | −0.7% | +3.4% | −0.6% | +5.9% | +1.2% |
| Best | +4.8% | +5.7% | +6.4% | +10.2% | +5.7% | +12.3% | +9.5% | +9.3% | +12.1% | +2.9% | +21.7% | +19.7% |
| Worst | −3.6% | −9.7% | −23.5% | −12.8% | −10.0% | −2.5% | −9.3% | −3.8% | −7.6% | −6.5% | −3.8% | −8.0% |
| vs SPY ⓘ | −2.6pp | +0.3pp | −0.1pp | −2.6pp | −0.7pp | −0.8pp | −2.6pp | −0.5pp | +1.7pp | −0.4pp | +1.8pp | +0.1pp |
121 monthly observations · 2016–2026 · benchmark SPY
