Bank of Ann Arbor
Ann Arbor, Michigan, Washtenaw County
$3.5B in total assets, the 379th largest of 4,309 US banks and 7th of 74 headquartered in Michigan.
- FDIC certificate
- 34120
- Established
- 1996
- Owned by
- Arbor Bcorp Inc
- Primary regulator
- FDIC
- Website
- www.bankofannarbor.com
At a glance
Compared with 17 banks headquartered in Michigan 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 | $3.5B | 65% | $1.5B | |
| Loans | $2.7B | 65% | $1.2B | |
| Deposits | $2.8B | 65% | $1.3B | |
| Return on assets | 1.85% | 94% | 1.26% | |
| Net interest margin | 4.41% | 94% | 3.79% | |
| Efficiency ratio | 44.4% | 12% | 62.4% | |
| Equity to assets | 14.27% | 94% | 9.26% | |
| Loans to deposits | 94% | 53% | 92% |
Growth
Total assets grew 6.4% a year over the last 5 years and 11.4% a year over 10 years, including 2 acquisitions in the last 10 years.
Acquisitions
| Closed | Acquired bank | Assets at acquisition |
|---|---|---|
| Nov 2021 | First National Bank in Howell Howell, MI | $664M |
| Jan 2017 | Bank of Birmingham Birmingham, MI | $290M |
| May 2010 | New Liberty Bank Plymouth, MI | $111M |
Where they operate
18 branches in 4 counties.
Largest markets by deposits
| County | Deposits | Market share | Rank |
|---|---|---|---|
| Washtenaw County, MI | $1.6B | 13.4% | 2 of 15 |
| Livingston County, MI | $605M | 13.6% | 4 of 12 |
| Oakland County, MI | $414M | 0.5% | 13 of 29 |
| Wayne County, MI | $212M | 0.3% | 10 of 15 |
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 11 branches since 2016 (7 to 18, +157.1%). 2 opened, 10 acquired, 1 closed or sold.
| Period | What happened | Opened or acquired | Closed or sold | Net change | Branches at end |
|---|---|---|---|---|---|
| Start of 2016 | Starting point | 7 | |||
| 2017 | Acquired Bank of Birmingham | 1 | 0 | +1 | 8 |
| 2021 | Acquired First National Bank in Howell | 9 | 0 | +9 | 17 |
| 2022 | Opened Birmingham | 1 | 0 | +1 | 18 |
| 2024 | Closed Birmingham | 0 | 1 | −1 | 17 |
| 2026 through Q2 | Opened Farmington Hills | 1 | 0 | +1 | 18 |
Balance sheet and earnings
Loans by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Commercial real estate | 40% | 30% | |
| Business (C&I) | 25% | 13% | |
| 1-4 family residential | 11% | 37% | |
| Multifamily | 7% | 4% | |
| Construction and land | 4% | 6% | |
| Consumer | 1% | 2% | |
| Farmland | 0% | 1% | |
| Other | 12% | 6% |
Deposits by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Other interest-bearing | 57% | 50% | |
| Noninterest-bearing | 30% | 22% | |
| Time deposits | 13% | 28% |
Brokered deposits are 0.0% of deposits (peers 11.1%).
Return on assets
Trailing four quarters, with the peer median.
Credit and capital
| This bank | Peer median | |
|---|---|---|
| Noncurrent loans | 0.27% | 0.76% |
| Net charge-offs, annualized | 0.07% | 0.02% |
| Reserves to loans | 1.23% | 1.11% |
| Leverage ratio | 13.17% | 9.34% |
Noncurrent loans exclude government-guaranteed portions.
Related banks
Similar size in Michigan
Largest competitors in Washtenaw County, MI
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/bank-ann-arbor-mi