First Security Bank of Roundup
Roundup, Montana, Musselshell County
$95M in total assets, the 3,773rd largest of 4,309 US banks and 31st of 35 headquartered in Montana.
- FDIC certificate
- 20479
- Established
- 1971
- Owned by
- Central Montana Bcorp
- Primary regulator
- FDIC
- Website
- www.1stsecurityroundup.com
At a glance
Compared with 580 US banks with under $100 million in assets, as of June 30, 2026.
| Measure | This bank | Percentile | Peer range, middle 90% | Peer median |
|---|---|---|---|---|
| Total assets | $95M | 92% | $62M | |
| Loans | $31M | 50% | $31M | |
| Deposits | $82M | 93% | $51M | |
| Return on assets | 2.32% | 89% | 0.96% | |
| Net interest margin | 4.59% | 77% | 3.84% | |
| Efficiency ratio | 49.6% | 9% | 70.8% | |
| Equity to assets | 13.02% | 54% | 12.56% | |
| Loans to deposits | 38% | 15% | 67% |
Growth
Total assets grew 2.6% a year over the last 5 years and 6.8% a year over 10 years, without acquisitions.
Where they operate
1 branch in 1 county.
Largest markets by deposits
| County | Deposits | Market share | Rank |
|---|---|---|---|
| Musselshell County, MT | $82M | 100.0% | 1 of 1 |
Deposits by branch from the FDIC Summary of Deposits, June 2026. Rank among all banks with branches in that county.
Branch history since 2016
No change since 2016. The bank has operated 1 branch throughout, with none opened, acquired, closed or sold.
Balance sheet and earnings
Loans by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Agricultural | 42% | 13% | |
| Business (C&I) | 38% | 12% | |
| Consumer | 10% | 7% | |
| Farmland | 5% | 13% | |
| 1-4 family residential | 4% | 33% | |
| Commercial real estate | 2% | 14% | |
| Construction and land | 1% | 4% | |
| Multifamily | 0% | 2% | |
| Other | 0% | 1% |
Deposits by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Other interest-bearing | 57% | 40% | |
| Noninterest-bearing | 35% | 23% | |
| Time deposits | 8% | 36% |
Brokered deposits are 0.0% of deposits (peers 1.7%).
Return on assets
Trailing four quarters, with the peer median.
Credit and capital
| This bank | Peer median | |
|---|---|---|
| Noncurrent loans | 5.35% | 0.45% |
| Net charge-offs, annualized | -0.04% | 0.00% |
| Reserves to loans | 2.07% | 1.24% |
| Leverage ratio | 13.36% | 13.04% |
Noncurrent loans exclude government-guaranteed portions.
Related banks
Similar size in Montana
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/banks/first-security-bank-roundup-mt