BMO Bank National Association
Chicago, Illinois, Cook County
$255B in total assets, the 16th largest of 4,309 US banks and 1st of 328 headquartered in Illinois.
- FDIC certificate
- 16571
- Established
- 1947
- Owned by
- Bank Of Montreal
- Primary regulator
- OCC
- Website
- www.bmo.com
At a glance
Compared with 31 US banks with over $100 billion in assets, as of June 30, 2026.
| Measure | This bank | Percentile | Peer range, middle 90% | Peer median |
|---|---|---|---|---|
| Total assets | $255B | 52% | $251B | |
| Loans | $142B | 42% | $149B | |
| Deposits | $194B | 45% | $225B | |
| Return on assets | 0.60% | 2% | 1.22% | |
| Net interest margin | 3.28% | 64% | 3.14% | |
| Efficiency ratio | 84.4% | 98% | 54.8% | |
| Equity to assets | 14.29% | 97% | 9.69% | |
| Loans to deposits | 73% | 48% | 74% |
Growth
Total assets grew 9.8% a year over the last 5 years and 9.0% a year over 10 years, including 1 acquisition in the last 10 years.
Acquisitions
| Closed | Acquired bank | Assets at acquisition |
|---|---|---|
| Feb 2023 | Bank of the West San Francisco, CA | $91.6B |
| Sep 2012 | (unknown, CERT 34833) , IL | $232M |
| Jul 2011 | M&I Marshall and Ilsley Bank Milwaukee, WI | $45.0B |
| Jul 2011 | The Harris Bank National Association Scottsdale, AZ, an affiliate under the same holding company | $648M |
| Jul 2011 | M & I Bank NATIONAL ASSOCIATION Las Vegas, NV | $1.2B |
| Apr 2010 | Amcore Bank, National Association Rockford, IL | $3.1B |
| Sep 2008 | Ozaukee Bank National Association Cedarburg, WI, an affiliate under the same holding company | $829M |
| Sep 2008 | Lincoln State Bank Milwaukee, WI, an affiliate under the same holding company | $1.3B |
| May 2007 | First National Bank & Trust Kokomo, IN, an affiliate under the same holding company | $1.4B |
| Aug 2006 | Mercantile National Bank of Indiana Hammond, IN, an affiliate under the same holding company | $767M |
| Feb 2006 | NLSB Plainfield, IL, an affiliate under the same holding company | $1.1B |
| Dec 2005 | Villa Park Trust & Savings Bank Villa Park, IL | $285M |
| May 2005 | Harris Bank Huntley Huntley, IL, an affiliate under the same holding company | $173M |
| May 2005 | Harris Bank Woodstock Woodstock, IL, an affiliate under the same holding company | $278M |
| May 2005 | Harris Bank Marengo Marengo, IL, an affiliate under the same holding company | $99M |
| May 2005 | Harris Bank Barrington, National Association Barrington, IL, an affiliate under the same holding company | $1.5B |
| May 2005 | Harris Bank Batavia, National Association Batavia, IL, an affiliate under the same holding company | $190M |
| May 2005 | Harris Bank Hinsdale, National Association Hinsdale, IL, an affiliate under the same holding company | $844M |
| May 2005 | Harris Bank Joliet, National Association Joliet, IL, an affiliate under the same holding company | $1.2B |
| May 2005 | Harris Trust and Savings Bank Chicago, IL, an affiliate under the same holding company | $22.3B |
| May 2005 | Harris Bank Cary-Grove Cary, IL, an affiliate under the same holding company | $232M |
| May 2005 | Harris Bank Palatine, National Association Palatine, IL, an affiliate under the same holding company | $585M |
| May 2005 | Harris Bank West, National Association Roselle, IL, an affiliate under the same holding company | $541M |
| May 2005 | Harris Bank Argo Summit, IL, an affiliate under the same holding company | $434M |
| May 2005 | Harris Bank Naperville Naperville, IL, an affiliate under the same holding company | $804M |
| May 2005 | Harris Bank Arlington-Meadows Rolling Meadows, IL, an affiliate under the same holding company | $318M |
| May 2005 | Harris Bank Aurora, National Association Aurora, IL, an affiliate under the same holding company | $202M |
| May 2005 | Harris Bank Westchester Westchester, IL, an affiliate under the same holding company | $209M |
| May 2005 | Suburban Bank of Barrington Barrington, IL, an affiliate under the same holding company | $279M |
| May 2005 | Harris Bank Hoffman-Schaumburg Hoffman Estates, IL, an affiliate under the same holding company | $113M |
| May 2005 | Harris Bank Elk Grove, National Association Elk Grove Village, IL, an affiliate under the same holding company | $197M |
| May 2005 | Harris Bank Oakbrook Terrace Oakbrook Terrace, IL, an affiliate under the same holding company | $153M |
| May 2005 | Harris Bank Wilmette, National Association Wilmette, IL, an affiliate under the same holding company | $140M |
| May 2005 | Harris Bank Libertyville Libertyville, IL, an affiliate under the same holding company | $377M |
| May 2005 | Harris Bank Bartlett Bartlett, IL, an affiliate under the same holding company | $231M |
| May 2005 | Harris Bank Winnetka, National Association Winnetka, IL, an affiliate under the same holding company | $478M |
| May 2005 | Harris Bank Frankfort Frankfort, IL, an affiliate under the same holding company | $333M |
| May 2005 | Harris Bank St. Charles Saint Charles, IL, an affiliate under the same holding company | $494M |
| Jun 2004 | Harris Bank Round Lake Round Lake Heights, IL, an affiliate under the same holding company | $182M |
Where they operate
988 branches in 259 counties.
Largest markets by deposits
| County | Deposits | Market share | Rank |
|---|---|---|---|
| Cook County, IL | $94.2B | 20.2% | 2 of 90 |
| Los Angeles County, CA | $8.1B | 1.6% | 11 of 91 |
| Milwaukee County, WI | $6.6B | 12.3% | 3 of 27 |
| Contra Costa County, CA | $5.6B | 11.1% | 4 of 31 |
| Dupage County, IL | $4.8B | 8.7% | 3 of 43 |
| Hennepin County, MN | $4.3B | 2.9% | 5 of 68 |
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 375 branches since 2016 (613 to 988, +61.2%). 20 opened, 525 acquired, 170 closed or sold.
| Period | What happened | Opened or acquired | Closed or sold | Net change | Branches at end |
|---|---|---|---|---|---|
| Start of 2016 | Starting point | 613 | |||
| 2016 | Sold 14 branches to Seacoast National BankOpened Chicago, closed Chicago and Madison | 1 | 16 | −15 | 598 |
| 2017 | Opened 3 in IllinoisClosed 7 in 2 states | 3 | 7 | −4 | 594 |
| 2018 | Opened ChicagoClosed 6 in 4 states | 1 | 6 | −5 | 589 |
| 2019 | Opened DallasClosed 10 in 5 states | 1 | 10 | −9 | 580 |
| 2020 | Opened GilbertClosed 37 in 6 states | 1 | 37 | −36 | 544 |
| 2021 | Opened ChicgoClosed 18 in 2 states | 1 | 18 | −17 | 527 |
| 2022 | Opened 3 in IllinoisClosed 10 in 3 states | 3 | 10 | −7 | 520 |
| 2023 | Acquired Bank of the WestOpened Vancouver, closed 12 in 4 states | 526 | 12 | +514 | 1,034 |
| 2024 | Opened 3 in 3 statesClosed 33 in 13 states | 3 | 33 | −30 | 1,004 |
| 2025 | Opened 4 in 2 statesClosed 4 in 2 states | 4 | 4 | 0 | 1,004 |
| 2026 through Q2 | Opened South GateClosed 17 in 5 states | 1 | 17 | −16 | 988 |
Balance sheet and earnings
Loans by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Business (C&I) | 32% | 18% | |
| 1-4 family residential | 20% | 19% | |
| Commercial real estate | 15% | 7% | |
| Consumer | 8% | 20% | |
| Construction and land | 3% | 2% | |
| Multifamily | 2% | 3% | |
| Agricultural | 1% | 0% | |
| Other | 19% | 32% |
Deposits by type
| Type | Share | This bank | Peers |
|---|---|---|---|
| Other interest-bearing | 64% | 72% | |
| Noninterest-bearing | 24% | 16% | |
| Time deposits | 13% | 13% |
Brokered deposits are 3.2% of deposits (peers 7.3%).
Return on assets
Trailing four quarters, with the peer median.
Credit and capital
| This bank | Peer median | |
|---|---|---|
| Noncurrent loans | 0.89% | 0.86% |
| Net charge-offs, annualized | 0.20% | 0.37% |
| Reserves to loans | 1.57% | 1.39% |
| Leverage ratio | 11.29% | 9.39% |
Noncurrent loans exclude government-guaranteed portions.
Related banks
Similar size in Illinois
Largest competitors in Cook County, IL
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/bmo