MidWestOne Financial Group, Inc. is a bank holding company headquartered in Iowa City, Iowa that operates 56 bank branches.[1] The third-largest bank headquartered in Iowa, it operates in Iowa, Minnesota, Wisconsin, Colorado, and Florida.[1]
History
The subsidiary bank was founded as Iowa State Bank & Trust Company in 1934 by Ben S. Summerwill.[3] In 1983, ISB Financial Corp. was established as a privately held banking holding company for ISB&TC.
In March 2008, ISB Financial merged with MidWestOne Financial Group and took MidWestOne Financial Group, Inc. as the name of the company.[4] In May 2015, four years after chairman W. Richard Summerwill retired,[5] the bank acquired Minnesota-based Central Bancshares for $134 million in cash and stock.[6]
Having opened its first branch in Denver, Colorado in 2017,[7] it hired Barry S. Ray as its Chief Financial Officer in June of the following year and Charles N. Reeves as its CEO in November 2022.
On October 23, 2025, it was announced that MidWestOne would be acquired by Nicolet Bankshares in a $864 million all-stock deal.[8] When it completed the merger of its operations with the Iowa firm in February 2026, Nicolet stated that the MidWestOne locations would subsequently adopt its brand.[9]
References
- MidWestOne Financial Group, Inc. 2016 Form 10-K Annual Report U.S. Securities and Exchange Commission^
- MidWestOne Financial Group, Inc. Reports Results for the Fourth Quarter and Full Year of 2019 Form 8-K U.S. Securities and Exchange Commission^
- George Ford. Retiring banker says next crisis not matter of if, but when The Gazette, February 13, 2011^
- Jonathan Stempel. ISB, MidWestOne in $96.5 mln Iowa bank merger Reuters, September 12, 2007^
- George Ford. MidwestOne chairman Summerwill retiring, successor named The Gazette, January 20, 2011^
- Paul Davis. MidWestOne in Iowa to Buy Central Bank in Minn. for $134M American Banker, November 21, 2014^
- MidWestOne to open Denver office The Gazette, February 22, 2017^
- Pritam Biswas. Nicolet Bankshares to buy MidWestOne in $864 million stock deal Reuters, October 23, 2025^
- Nicolet Bankshares, Inc. Completes Merger with MidWestOne Financial Group, Inc. Business Wire, retrieved 2026-02-20^