| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | ESL Federal Credit Union | Credit union | 1 | $183.8M* | 27.75% |
| 2 | KeyBank National Association | Bank | 3 | $172.4M | 26.02% |
| 3 | Five Star Bank | Bank | 2 | $108.2M | 16.33% |
| 4 | Tompkins Bank & Trust | Bank | 1 | $101.9M | 15.38% |
| 5 | Manufacturers and Traders Trust Company | Bank | 1 | $38.2M | 5.76% |
| 6 | Ontario Shores Federal Credit Union | Credit union | 1 | $37.0M* | 5.58% |
| 7 | Cobblestone Country Federal Credit Union | Credit union | 1 | $21.0M* | 3.17% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2026 | $662.4M | 7 | 10 | ESL Federal Credit Union | 27.8% | 2,025 |
| 2025 | $528.9M | 7 | 10 | KeyBank National Association | 32.1% | 2,055 |
| 2024 | $545.4M | 8 | 12 | KeyBank National Association | 30.6% | 1,992 |
| 2023 | $594.5M | 8 | 12 | KeyBank National Association | 29.0% | 1,895 |
| 2022 | $631.6M | 8 | 12 | KeyBank National Association | 27.6% | 1,911 |
Every institution above links to its profile — ratios, peer medians and this quarter’s change signals. Pro adds the full table, share movement and CSV export.