Nicolet Bankshares
A U.S. regional bank holding company headquartered in Green Bay, Wisconsin, and the parent of Nicolet National Bank.
Last updated August 24, 2026
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Overview
Nicolet Bankshares, Inc. is a regional bank holding company headquartered in Green Bay, Wisconsin. Its principal banking subsidiary is Nicolet National Bank, a community-oriented institution serving customers and businesses in Wisconsin and Michigan. The company developed from a group of local bankers’ response to what they viewed as the weakening of community-bank relationships at an existing institution. Robert B. Atwell and Mike Daniels founded Nicolet in November 2000 with an emphasis on local decision-making, relationship banking, and service to the communities in which its branches operate. Nicolet expanded primarily through a combination of organic growth, branch acquisitions, and mergers with other regional banks. In 2010, it acquired four branches from Anchor Bank. In 2013, it acquired Mid-Wisconsin Bank and the Bank of Wausau, broadening its Wisconsin presence. Its 2015 combination with Baylake Bank, followed by shareholder approval in April 2016 and closing on April 29, 2016, was a major step in the company’s development; the combined institution operated under the Nicolet National Bank name. The transaction was valued at approximately $140 million. The company also pursued further consolidation in the upper Midwest. Nicolet announced a proposed acquisition of Commerce State Bank in February 2020, but terminated that agreement in May of the same year, citing the effects of the coronavirus pandemic and the decline in Nicolet’s publicly traded share price. In September 2021, Nicolet completed its merger with Mackinac Financial Corporation, the Michigan-based parent of mBank. The transaction extended Nicolet’s footprint into Michigan, although Nicolet subsequently closed several mBank locations and divested selected branches and a lending office in Michigan. In August 2022, Nicolet completed its merger with Charter Bankshares, Inc., with Charter merging into Nicolet as the surviving corporation. The transaction was reported as having a value of approximately $1.1 billion and further increased the scale of Nicolet’s banking franchise. As of June 30, 2021, the company had more than $6.1 billion in assets, according to the cited reference material. Leadership continuity has been accompanied by a planned transition. In April 2021, Robert B. Atwell left the chief executive role after 19 years and became executive chairman, while co-founder Mike Daniels became president and chief executive officer. The company’s stated and historical identity is that of a relationship-focused regional bank rather than a nationally distributed retail brand. Its activities encompass deposit gathering, lending, treasury and cash-management services, wealth-related offerings, and other commercial and consumer banking services delivered through Nicolet National Bank. In October 2025, Nicolet Bankshares agreed to acquire MidWestOne Financial Group in an all-stock transaction reported at approximately $864 million. The proposed deal represents another expansion of the company’s regional banking platform, subject to the conditions and approvals applicable to the transaction. Nicolet’s overall growth model therefore combines community-bank positioning with the scale benefits of acquiring established local and regional institutions.
History
Nicolet Bankshares was established in November 2000 by Robert B. Atwell and Mike Daniels. The founders had worked at a local bank and believed that the institution was moving away from the community-bank model they considered important. They created Nicolet around a relationship-banking philosophy, with an emphasis on local customers, business relationships, and community participation. The company’s early expansion included the acquisition of four branches from Anchor Bank in 2010. In 2013, Nicolet acquired Mid-Wisconsin Bank and the Bank of Wausau, increasing its presence across Wisconsin. A larger strategic step came through its combination with Baylake Bank. The transaction received shareholder approval from both institutions on April 12, 2016, after the companies had announced the merger in 2015. It closed on April 29, 2016, in a deal valued at approximately $140 million, and the combined bank used the Nicolet National Bank name. Nicolet continued to evaluate acquisitions as a way to increase scale and geographic reach. In February 2020, it announced an agreement to acquire Commerce State Bank, based in West Bend, Wisconsin, including four branches. The proposed transaction was valued at approximately $129.6 million. In May 2020, however, Nicolet terminated the agreement. The company attributed the decision to the impact of the coronavirus pandemic and the decline in the share price of its publicly traded stock. A leadership transition occurred in April 2021. Robert B. Atwell stepped down as chief executive officer after 19 years and became executive chairman. Mike Daniels, who had helped establish Nicolet, became president and chief executive officer. Later that year, on September 3, 2021, Nicolet completed its merger with Mackinac Financial Corporation, a Manistique, Michigan-based company operating as mBank. The merger added branches in Michigan’s Upper Peninsula and northern Lower Peninsula. Nicolet subsequently closed the mBank branches in Menominee, Alanson, Kaleva, Mio, West Ishpeming, Negaunee, and the McClellan Avenue location in Marquette. It also sold the Birmingham branch and a Metro Detroit lending office to Bank of Ann Arbor. On August 30, 2022, Nicolet completed its merger with Charter Bankshares, Inc. Charter merged into Nicolet, which remained the surviving corporation. The transaction was reported as having a value of approximately $1.1 billion and represented a substantial increase in the company’s regional banking scale. The reference material states that Nicolet had more than $6.1 billion in assets as of June 30, 2021. Nicolet’s business remains centered on Nicolet National Bank and the delivery of commercial, consumer, and community banking services. Its regional model combines deposits and lending with business banking, cash-management, and related financial services. The company’s historical growth has been concentrated in Wisconsin and Michigan rather than through a nationwide branch network. In October 2025, Nicolet agreed to acquire MidWestOne Financial Group in an all-stock transaction reported at approximately $864 million. This proposed combination would further extend Nicolet’s regional banking platform, although the supplied material does not establish the transaction’s subsequent closing status.
- 2025
Agreement to acquire MidWestOne Financial Group
[1]Nicolet agrees to an approximately $864 million all-stock acquisition of MidWestOne Financial Group.
- 2022
Charter Bankshares merger closes
[1]Charter Bankshares merges into Nicolet, with Nicolet as the surviving corporation.
- 2021
Leadership transition and Mackinac Financial merger
[1]Mike Daniels becomes CEO, and Nicolet completes its merger with Mackinac Financial Corporation.
- 2016
Baylake Bank merger closes
[1]The Baylake Bank combination closes on April 29, with the combined institution operating as Nicolet National Bank.
- 2013
Mid-Wisconsin Bank and Bank of Wausau acquisitions
[1]Nicolet acquires Mid-Wisconsin Bank and the Bank of Wausau, expanding its Wisconsin platform.
- 2010
Anchor Bank branch acquisition
[1]Nicolet acquires four branches from Anchor Bank.
- 2000
Nicolet Bankshares is founded
[1]Robert B. Atwell and Mike Daniels establish Nicolet in November with a community-banking focus.
Products and positioning
A relationship-focused regional bank emphasizing community banking, local decision-making, and service to businesses, consumers, and communities in the upper Midwest.
Business banking
Commercial banking
Nicolet National Bank’s commercial banking activity serves businesses through lending, deposit, treasury, and relationship-management services. Its regional model is oriented toward locally based companies and institutions that require ongoing banking relationships rather than only standardized transaction products.
Retail banking
Consumer banking
Consumer banking includes deposit accounts and personal borrowing products delivered through Nicolet’s branch and digital channels. The available reference material identifies consumer banking as part of the company’s scope but does not provide a detailed product catalogue.
Credit products
Lending
The bank provides lending for commercial, real-estate, consumer, and related customer needs. Lending is a central component of Nicolet’s community-bank model and is delivered through local banking relationships in its Wisconsin and Michigan markets.
Cash management
Treasury management
Treasury and cash-management services support business customers with the management of operating deposits, payments, liquidity, and related banking processes. Specific named products are not identified in the supplied reference material.
Brand decisions
2025
Agreement to acquire MidWestOne Financial GroupM&ABackground
Nicolet sought further regional expansion through an all-stock combination with MidWestOne Financial Group.
Action taken
Nicolet agreed to acquire MidWestOne in a transaction reported at approximately $864 million.
Aftermath
The supplied material does not establish whether the proposed acquisition subsequently closed.
Reported transaction value. Approximately $864 million (October 2025)
2022
Charter Bankshares mergerM&ABackground
Nicolet pursued additional scale through the combination with Charter Bankshares.
Action taken
The merger closed on August 30, 2022, with Charter merging into Nicolet.
Aftermath
Nicolet remained the surviving corporation and expanded its regional banking platform.
Reported transaction value. Approximately $1.1 billion (2022)
2021
CEO successionStrategyBackground
Robert B. Atwell had served as chief executive officer for 19 years and was preparing to move out of the operating CEO role.
Action taken
Mike Daniels became president and chief executive officer, while Atwell became executive chairman.
Aftermath
The transition preserved founder involvement while placing day-to-day executive leadership with Daniels.
2021
Mackinac Financial Corporation mergerM&ABackground
Mackinac Financial Corporation operated mBank in Michigan, providing Nicolet with an opportunity to extend its upper-Midwest banking footprint.
Action taken
Nicolet completed the merger on September 3, 2021, and later rationalized selected branches and offices.
Aftermath
Nicolet gained Michigan operations while closing or divesting selected locations.
2020
Termination of Commerce State Bank acquisitionM&ABackground
Nicolet had agreed to acquire Commerce State Bank and its four branches, but the coronavirus pandemic and falling share price changed the transaction environment.
Action taken
Nicolet terminated the acquisition agreement in May 2020.
Aftermath
The proposed acquisition did not close, and Nicolet subsequently pursued other regional expansion opportunities.
Proposed transaction value. Approximately $129.6 million (2020)
Recent events
- 2025
Nicolet agrees to acquire MidWestOne Financial Group[1]
M&A
Nicolet Bankshares agreed to acquire MidWestOne Financial Group in an all-stock transaction reported at approximately $864 million.
- 2022
Nicolet completes Charter Bankshares merger[1]
M&A
Charter Bankshares merged into Nicolet Bankshares, with Nicolet surviving. The transaction was reported as having a value of approximately $1.1 billion.
- 2021
Mike Daniels becomes president and chief executive officer[1]
Leadership change
Robert B. Atwell left the CEO position after 19 years and became executive chairman. Co-founder Mike Daniels assumed the president and CEO roles.
- 2021
Nicolet completes Mackinac Financial Corporation merger[1]
M&A
Nicolet completed its combination with Mackinac Financial Corporation, the parent of mBank, expanding the company’s banking operations into Michigan.
- 2020
Nicolet announces proposed acquisition of Commerce State Bank[1]
M&A
Nicolet Bankshares announced plans to acquire West Bend, Wisconsin-based Commerce State Bank and its four branches in a transaction valued at approximately $129.6 million.
- 2020
Nicolet terminates Commerce State Bank acquisition agreement[1]
M&A · Other
Nicolet ended its proposed Commerce State Bank transaction, citing the business effects of the coronavirus pandemic and the decline in Nicolet’s publicly traded share price.
Sources3 sources
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