| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | Greylock Federal Credit Union | Credit union | 12 | $1.31B* | 23.23% |
| 2 | Beacon Bank and Trust | Bank | 13 | $1.25B | 22.26% |
| 3 | Adams Community Bank | Bank | 10 | $822.6M | 14.64% |
| 4 | TD Bank, National Association | Bank | 3 | $531.9M | 9.47% |
| 5 | Lee Bank | Bank | 5 | $519.6M | 9.25% |
| 6 | MountainOne Bank | Bank | 3 | $515.5M | 9.17% |
| 7 | The Pittsfield Co-operative Bank | Bank | 5 | $327.7M | 5.83% |
| 8 | NBT Bank, National Association | Bank | 7 | $232.5M | 4.14% |
| 9 | Citizens Bank, National Association | Bank | 1 | $56.2M | 1.00% |
| 10 | TrustCo Bank | Bank | 1 | $31.5M | 0.56% |
| 2 more institutions, year-over-year share and branch changes with Pro →$29/mo, cancel any time. | |||||
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2026 | $5.62B | 12 | 63 | Greylock Federal Credit Union | 23.2% | 1,561 |
| 2025 | $5.94B | 12 | 64 | Berkshire Bank | 27.9% | 1,694 |
| 2024 | $5.82B | 12 | 64 | Berkshire Bank | 27.4% | 1,678 |
| 2023 | $5.80B | 13 | 65 | Berkshire Bank | 26.1% | 1,697 |
| 2022 | $6.32B | 13 | 65 | Berkshire Bank | 28.8% | 1,732 |
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.