| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | Greylock Federal Credit Union | Credit union | 11 | $1.28B* | 29.79% |
| 2 | Adams Community Bank | Bank | 10 | $807.7M | 18.85% |
| 3 | TD Bank, National Association | Bank | 4 | $575.9M | 13.44% |
| 4 | MountainOne Bank | Bank | 3 | $478.1M | 11.16% |
| 5 | Lee Bank | Bank | 5 | $473.3M | 11.05% |
| 6 | The Pittsfield Co-operative Bank | Bank | 5 | $314.0M | 7.33% |
| 7 | NBT Bank, National Association | Bank | 8 | $252.3M | 5.89% |
| 8 | Citizens Bank, National Association | Bank | 1 | $52.2M | 1.22% |
| 9 | TrustCo Bank | Bank | 1 | $28.8M | 0.67% |
| 10 | Mycom Federal Credit Union | Credit union | 1 | $24.0M* | 0.56% |
| 1 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 |
|---|---|---|---|---|---|---|
| 2025 | $4.28B | 11 | 51 | Greylock Federal Credit Union | 29.8% | 1,761 |
| 2024 | $4.23B | 11 | 51 | Greylock Federal Credit Union | 29.6% | 1,760 |
| 2023 | $4.11B | 11 | 47 | Greylock Federal Credit Union | 32.4% | 1,907 |
| 2022 | $4.31B | 11 | 46 | Greylock Federal Credit Union | 30.9% | 1,840 |
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.