Farmers and Merchants Union Bank
Columbus, Wisconsin, Columbia County
$872M in total assets, the 1,195th largest of 4,309 US banks and 35th of 155 headquartered in Wisconsin.
- FDIC certificate
- 14445
- Established
- 1861
- Owned by
- Jewel Box Finl Services Inc
- Primary regulator
- FDIC
- Website
- WWW.FMUB.BANK
At a glance
Compared with 109 banks headquartered in Wisconsin with $100 million to $1 billion in assets, as of June 30, 2026.
| Measure | This bank | Percentile | Peer range, middle 90% | Peer median |
|---|---|---|---|---|
| Total assets | $872M | 98% | $344M | |
| Loans | $648M | 98% | $241M | |
| Deposits | $752M | 98% | $287M | |
| Return on assets | 1.91% | 86% | 1.24% | |
| Net interest margin | 4.18% | 79% | 3.85% | |
| Efficiency ratio | 44.1% | 11% | 60.7% | |
| Equity to assets | 11.69% | 71% | 10.38% | |
| Loans to deposits | 86% | 49% | 86% |
Growth
Total assets grew 15.2% a year over the last 5 years and 9.9% a year over 10 years, including 2 acquisitions in the last 10 years.
Acquisitions
| Closed | Acquired bank | Assets at acquisition |
|---|---|---|
| Feb 2026 | American Bank of Beaver Dam Beaver Dam, WI | $219M |
| Jan 2025 | Wisconsin River Bank Sauk City, WI | $180M |
Where they operate
13 branches in 5 counties.
Largest markets by deposits
| County | Deposits | Market share | Rank |
|---|---|---|---|
| Columbia County, WI | $465M | 23.4% | 2 of 8 |
| Dodge County, WI | $180M | 11.4% | 2 of 10 |
| Sauk County, WI | $59M | 2.4% | 11 of 13 |
| Juneau County, WI | $29M | 4.9% | 3 of 4 |
| Rock County, WI | $20M | 0.6% | 17 of 18 |
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 gain of 7 branches since 2016 (6 to 13, +116.7%). 0 opened, 7 acquired, 0 closed or sold.
| Period | What happened | Opened or acquired | Closed or sold | Net change | Branches at end |
|---|---|---|---|---|---|
| Start of 2016 | Starting point | 6 | |||
| 2025 | Acquired Wisconsin River Bank | 3 | 0 | +3 | 9 |
| 2026 through Q2 | Acquired American Bank of Beaver Dam | 4 | 0 | +4 | 13 |
Balance sheet and earnings
Loans by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Commercial real estate | 37% | 28% | |
| 1-4 family residential | 17% | 32% | |
| Farmland | 11% | 8% | |
| Construction and land | 11% | 7% | |
| Multifamily | 10% | 8% | |
| Agricultural | 7% | 2% | |
| Business (C&I) | 5% | 10% | |
| Consumer | 1% | 2% | |
| Other | 1% | 2% |
Deposits by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Other interest-bearing | 41% | 48% | |
| Time deposits | 39% | 34% | |
| Noninterest-bearing | 20% | 19% |
Brokered deposits are 0.4% of deposits (peers 5.7%).
Return on assets
Trailing four quarters, with the peer median.
Credit and capital
| This bank | Peer median | |
|---|---|---|
| Noncurrent loans | 0.15% | 0.23% |
| Net charge-offs, annualized | -0.05% | 0.00% |
| Reserves to loans | 1.97% | 1.14% |
| Leverage ratio | 9.97% | 10.95% |
Noncurrent loans exclude government-guaranteed portions.
Related banks
Similar size in Wisconsin
Largest competitors in Columbia County, WI
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/farmers-merchants-union