MountainOne Bank
North Adams, Massachusetts, Berkshire County
$1.1B in total assets, the 990th largest of 4,309 US banks and 47th of 95 headquartered in Massachusetts.
- FDIC certificate
- 90253
- Established
- 1848
- Owned by
- Mountainone Financial Mhc
- Primary regulator
- FDIC
- Website
- www.mountainone.com
At a glance
Compared with 46 banks headquartered in Massachusetts with $1 billion to $10 billion in assets, as of June 30, 2026.
| Measure | This bank | Percentile | Peer range, middle 90% | Peer median |
|---|---|---|---|---|
| Total assets | $1.1B | 9% | $2.0B | |
| Loans | $837M | 9% | $1.5B | |
| Deposits | $774M | 2% | $1.7B | |
| Return on assets | 1.23% | 91% | 0.72% | |
| Net interest margin | 3.81% | 89% | 3.02% | |
| Efficiency ratio | 67.0% | 30% | 69.8% | |
| Equity to assets | 15.79% | 94% | 10.84% | |
| Loans to deposits | 108% | 87% | 100% |
Growth
Total assets grew 4.0% a year over the last 5 years and 2.5% a year over 10 years, without acquisitions.
Acquisitions
| Closed | Acquired bank | Assets at acquisition |
|---|---|---|
| Jul 2013 | South Coastal Bank Rockland, MA, an affiliate under the same holding company | $295M |
| Jun 2012 | Williamstown Savings Bank Williamstown, MA, an affiliate under the same holding company | $219M |
Where they operate
6 branches in 3 counties.
Largest markets by deposits
| County | Deposits | Market share | Rank |
|---|---|---|---|
| Berkshire County, MA | $515M | 12.0% | 5 of 9 |
| Plymouth County, MA | $150M | 0.8% | 16 of 17 |
| Norfolk County, MA | $109M | 0.2% | 30 of 35 |
Deposits by branch from the FDIC Summary of Deposits, June 2026. Rank among all banks with branches in that county.
Branch history since 2016
Net loss of 2 branches since 2016 (8 to 6, −25.0%). 0 opened, 0 acquired, 2 closed or sold.
| Period | What happened | Opened or acquired | Closed or sold | Net change | Branches at end |
|---|---|---|---|---|---|
| Start of 2016 | Starting point | 8 | |||
| 2018 | Closed Danvers | 0 | 1 | −1 | 7 |
| 2021 | Closed North Adams | 0 | 1 | −1 | 6 |
Balance sheet and earnings
Loans by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Commercial real estate | 36% | 26% | |
| 1-4 family residential | 26% | 46% | |
| Construction and land | 21% | 7% | |
| Business (C&I) | 9% | 8% | |
| Multifamily | 7% | 10% | |
| Consumer | 1% | 2% | |
| Other | 0% | 1% |
Deposits by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Time deposits | 42% | 31% | |
| Other interest-bearing | 40% | 53% | |
| Noninterest-bearing | 19% | 16% |
Brokered deposits are 19.5% of deposits (peers 3.4%).
Return on assets
Trailing four quarters, with the peer median.
Credit and capital
| This bank | Peer median | |
|---|---|---|
| Noncurrent loans | 1.06% | 0.58% |
| Net charge-offs, annualized | 0.16% | 0.01% |
| Reserves to loans | 1.03% | 0.84% |
| Leverage ratio | 14.75% | 11.15% |
Noncurrent loans exclude government-guaranteed portions.
Related banks
Similar size in Massachusetts
Largest competitors in Berkshire County, MA
Figures as of June 30, 2026 from the bank's Call Report, FDIC structure and branch data, and the Federal Reserve. Short link: bankingstats.com/mountainone