Mergers, Acquisitions, Conversions, Redomestications, and Restructurings

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Last Updated: June 17, 2025

​Insurance Company Mergers, Acquisitions, Conversions, Redomestications, and Restructurings​

​​​Jump to Section: Acquisitions​ | Conversions​ | Mergers | Redomestications | Restructurings​

• Badger Mutual Insurance Company by Rural Mutual Insurance Company​
  

• SeniorDent Dental Plan, Inc. by Rebgenix, LLC, and Richard Sawicz​
  

• Security Health Plan of Wisconsin, Inc. by Sanford​
  

• Permanent General Assurance Corporation, Permanent General Assurance Corporation of Ohio, and The General Automobile Insurance Company, Inc. by Sentry Insurance Company, Sentry Holdings, Inc., and Sentry Mutual Holding Company​​
  

• Ambac Assurance Corporation by American Acorn Corporation, American Acorn Holdings LLC, Oaktree Opportunities Fund XII Holdings (Delaware), L.P., Oaktree Fund GP, LLC, Oaktree Fund GP I, LP, Oaktree Capital I GP, LLC, Oaktree Capital Holdings, LLC, Oaktree Capital Group Holdings, LP, Oaktree Capital Group Holdings GP, LLC, Bruce Karsh, Howard Marks, and Sheldon Stone​​
  

• Common Ground Healthcare Cooperative by CareSource​​
  

• CM Regent Insurance Company, CM Vantage Specialty Insurance Company, and CM Indemnity Insurance Company​​ by Church Mutual Insurance Company, S.I.​​
  

• SU Insurance Company by Michael H. Polaski u/a/d October 24, 1991, as amended​ 
  

• MercyCare Insurance Company and MercyCare HMO, Inc. by MercyCare Merger Sub, Inc.​​

• Aspirus Health Plan, Inc. by St. Luke's Hospital of Duluth​​
  

• ​Wisconsin Physicians Service Insurance Corporation, the EPIC Life Company, and WPS Health Plan, Inc. by WPS Holdings, Inc.​
  

• Wisconsin Collaborative Insurance Company by Blue Cross Blue Shield of Wisconsin​​​

• Network Health Insurance Company and Network Health Plan by ThedaCare, Inc.​
  

• Quartz Health Insurance Corporation by SummitOne Enterprises, Inc.

• Quartz Health Benefit Plans Corporation by SummitOne Enterprises, Inc.​

• Quartz Health Plan Corporation by SummitOne Enterprises, Inc.​

• CM Select Insurance Company by MGT Partners LLC, Michael Topol, Graham Topol, Riviera Capital Partners I, LP, Riviera Capital Partners II, LP, and Riviera Capital Partners SPV III, LP​​ 

• Quartz Health Plan Corporation by Bellin Gunderson Health Systems, Inc.
  

• Quartz Health Insurance Corporation by Bellin Gunderson Health Systems, Inc.
  

• Quartz Health Benefit Plans Corporation by Bellin Gunderson Health Systems, Inc.​
  

• ​Capitol Indemnity Corporation by Berkshire Hathaway, Inc., O&M Acquisition Corp., and Warren E. Buffett​
  

• Capitol Specialty Insurance Corporation by Berkshire Hathaway, Inc., O&M Acquisition Corp., and Warren E. Buffett
  

• Settlers Life Insurance Company by Everly Holdings, LLC​
  

• My Choice Wisconsin Health Plan Inc., and My Choice Wisconsin Inc. by My Choice Foundation Holdings Inc.

• Wisconsin Collaborative Insurance Company by Anthem, Inc., and its subsidiary Crossroads Acquisition Corp.

• Quartz Health Insurance Corporation by Advocate Aurora Health, Inc., and Aurora Health Care, Inc.

• Quartz Health Benefit Plans Corporation by Advocate Aurora Health, Inc., and Aurora Health Care, Inc.

• State Auto Insurance Company by Liberty Mutual Holding Company Inc., LMHC Massachusetts Inc., and Liberty Mutual Group Inc.

• Madison National Life Insurance Company, Inc., by Horace Mann Educators Corporation

• Dean Health Insurance, Inc. and Dean Health Plan, Inc. by Medica Holding Company

• Bowhead Insurance Company, Inc. by Bowhead Holdings, Inc.

• Superior Vision Insurance Plan of Wisconsin, Inc. by MetLife, Inc.

• Glencar Insurance Company by Hannover Ruck Beteiligung Verwaltungs-GmbH and Hannover Re Holdings (UK) Limited

• Southern Life and Health Insurance Company by C. Brent Haggard and Universal Fidelity Life Insurance Company

• Unigard Insurance Company by Sentry Insurance a Mutual Company

• Southern Fire & Casualty Company by Sentry Insurance a Mutual Company

• Quartz Health Plan Corporation by Advocate Aurora Health, Inc., and Aurora Health Care, Inc.

• Everspan Insurance Company by Ambac Financial Group, Inc.

• Capitol Indemnity Corporation and Capitol Specialty Insurance Corporation by Alleghany Corporation and Alleghany Insurance Holdings LLC 

• WellCare Health Insurance Company of Wisconsin, Inc., and WellCare Health Plans of Wisconsin, Inc. by Centene Corporation

• IDS Property and Casualty Insurance Company and its subsidiary Ameriprise Insurance Company by American Family Insurance Mutual Holding Company and AmFam, Inc.

• Trilogy Health Insurance, Inc., by My Choice Family Care, Inc. (Case No. 19-C43062)

• Aspirus Arise Health Plan of Wisconsin (AAHPWI) by Aspirus, Inc.

• National Insurance Company of Wisconsin, Inc, by Wilmington Holdings Corporation and merger of Wilmington Insurance Company with and into National Insurance Company of Wisconsin, Inc. (Case No. 18-C42958)

• National Farmers Union Property and Casualty Company by Integon National Insurance Company, National General Holdings Corp., and Leah Karfunkel, individually, and as Trustee of the Michael Karfunkel Family 2005 Trust and the Leah Karfunkel 2016-NG GRAT

• Unigard Indemnity Company by Sutton National Insurance Holdings LLC, Brickell Insurance Holdings LLC, MTCP LLC, and Mr. Steven Pasko

• Time Insurance Company by Haven Holdings Inc., and Haven Insurance Company II

• Health Tradition Health Plan by WEA Insurance Trust

• Series of Form A statements concerning the announced merger of Davis Vision and Superior Vision

• Time Insurance Company and John Alden Life Insurance Company

• Wisconsin Collaborative Insurance Company (WCIC) by Advocate Aurora Health, Inc. (Applicant)

• The Omaha Indemnity Company by Hannover Finance, Inc. (Applicant)

• Gundersen Health Plan, Inc., and Unity Health Plans Insurance Corporation by Iowa Health System d/b/a UnityPoint Health and Physicians Plus Insurance Corporation by University Health Care, Inc., and Gundersen Lutheran Health System, Inc.

• Northwestern National Insurance Company of Milwaukee, Wisconsin (NNIC) by Sandell Holdings Limited (Applicant)

• Blue Ridge Indemnity Company (Blue Ridge) by LOTS Intermediate Co. (Applicant)

• Southern Guaranty Insurance Company (SGIC) by Premier Servicing, LLC (Applicant)

• United National Specialty Insurance Company (UNSIC) by State National Companies, Inc. (SNC), and State National Insurance Company, Inc. (SNIC) (Applicants)

• Northwestern National Insurance Company of Milwaukee, Wisconsin (NNIC) By SOBC Gamma Holding Company Limited (Applicant)​

• Gundersen Health Plan, Inc. (GHP) by University Health Care, Inc. (UHC), and Unity Health Plans Insurance Corporation (Unity) by Gundersen Lutheran Health System, Inc. (GHS) (UHC and GHS, collectively, the Applicants; GHP and Unity, collectively, the Insurers)

• Superior Vision Insurance Plan of Wisconsin, Inc. (Domestic Insurer) by Wink Holdco, Inc., Wink Parent, Inc., Centerbridge Capital Partners III, L.P., Centerbridge Capital Partners SBS III, L.P., and CCP III Cayman GP Ltd. (Collectively, the Applicant)

• Pacific Indemnity Company (Wisconsin Domestic Insurer) by ACE Limited (ACE), ACE Group Holdings, Inc. (ACE Group Holdings), and ACE INA Holdings Inc. (ACE INA) [Collectively, the Applicant]

• Humana Insurance Company, HumanaDental Insurance Company, Humana Wisconsin Health Organization Insurance Corporation, and Independent Care Health Plan, (Collectively, the Wisconsin Domestic Insurers) by Aetna Inc.

• MercyCare Insurance Company (MCIC) and MercyCare HMO, Inc. (MCHMO) (Collectively, the Wisconsin Domestic Insurers) by Interstate Alliance, Inc. (Applicant)

• Network Health Plan (NHP) and Network Health Insurance Corporation (NHIC) (Collectively, the Wisconsin Domestic Insurers) by Froedtert Health, Inc. (Applicant)

• Trilogy Health Insurance, Inc. (THI) by Independent Physicians Network, Inc. (IPN), Scas Management Group, LLC (SMG), and Bonita Louise Warner (collectively, the Applicants)

• Physicians Plus Insurance Corporation (PPIC) by Iowa Health System d/b/a UnityPoint Health (Applicant)

• CMG Mortgage Insurance Company (CMG MI), CMG Mortgage Assurance Company (CMG MA) and CMG Mortgage Reinsurance Company (CMG Re) by Arch U.S. MI Holdings Inc.

• Vision Insurance Plan of America, Inc. (a Wisconsin Domestic Insurer) by Superior Vision Acquisition Corp.

• Dean Health Insurance, Inc., and Dean Health Plan, Inc., by SSM Health Care Corporation and FPP, Inc.

• Esurance Insurance Company and Esurance Insurance Company of New Jersey (Wisconsin Domestic Insurers) by The Allstate Corporation and Allstate Insurance Holdings, LLC

• General Casualty Company of Wisconsin, Blue Ridge Indemnity Company, Blue Ridge Insurance Company, MassWest Insurance Company, Regent Insurance Company, Southern Guaranty Insurance Company, Southern Pilot Insurance Company, Southern Fire & Casualty Company (Wisconsin Domestic Insurers) by QBE Reinsurance Corporation, QBE Insurance Group Limited

• Sheboygan Falls Mutual Insurance Company, filed by Donegal Mutual Insurance Company

• General Casualty Company of Wisconsin, Blue Ridge Indemnity Company, Blue Ridge Insurance Company, MassWest Insurance Company, Regent Insurance Company, Southern Guaranty Insurance Company, Southern Pilot Insurance Company, Southern Fire & Casualty Company, (Subsidiaries of Winterthur U.S. Holdings, Inc.) by AXA, AXA Assurance Vie Mutuelle, AXA Courtage Assurance Mutuelle, AXA Assurance IARD Mutuelle

• Physicians Insurance Company of Wisconsin, Inc., by ProAssurance Corporation

• Unity Health Plans Insurance Corporation by University Health Care, Inc.​

• Physicians Insurance Company of Wisconsin, Inc., by American Physicians Capital, Inc., and American Physicians Assurance Corporation

• PacifiCare Health Systems, Inc., by UnitedHealth Group Incorporated, and the Acquisition of Control of American Medical Security Life Insurance Company

• United Wisconsin Life Insurance Company by PacifiCare Health Systems, Inc.

• Cobalt Corporation by WellPoint Health Networks Inc.

​Conversions​​​

• Lebanon-Clyman Mutual Insurance Company and Seneca, Sigel Mutual Insurance Company to a Single Chapter 611 Mutual Insurance Company​
  

• Central Wisconsin Mutual Insurance Company to Chapter 611 Mutual Insurance Company​
  

• Medina Mutual Insurance Company and Sugar Creek Mutual Insurance Company to a Single Chapter 611 Mutual Insurance Company​
  

• Green County Mutual Insurance Company to Chapter 611 Mutual Insurance Company​
  

• Ashland County Town Insurance Company, Darlington Mutual Insurance Company, Liberty Mutual Fire Insurance Company, Price County Town Mutual Insurance Company, River Falls Mutual Insurance Company, Stockholm Town Mutual Insurance Company, and River Valley Mutual Insurance Company to a Single Chapter 611 Mutual Insurance Company​​

• ​Theresa Mutual Insurance Company to Chapter 611 Mutual Insurance Company​

• Reedsburg-Westfield Mutual Insurance Company and Baraboo Mutual Insurance Company to a Single Chapter 611 Mutual Insurance Company​
  

• Bloomington Farmers Mutual Insurance Company to Chapter 611 Mutual Insurance Company
  

• Mt. Pleasant-Perry Middleton Mutual Insurance Company to Chapter 611 Mutual Insurance Company
  

• Wisconsin River Mutual Insurance Company to Chapter 611 Mutual Insurance Company​​
  

• Sheboygan Falls Mutual Insurance Company
  

• Blue Cross & Blue Shield United of Wisconsin​

Mergers​​

• Catholic United Financial with and into Trusted Fraternal Life​
  

• Mt. Pleasant-Perry Middleton Mutual Insurance Company with and into Mt. Morris Mutual Insurance Company​
  

• Jamestown Mutual Insurance Company with and into Eagle Point Mutual Insurance Company​
  

• Woman's Life Insurance Society with and into Trusted Fraternal Life​
  

• Heartland Mutual Insurance Company with and into Arlington Mutual Insurance Company​
  

• Helenville Mutual Insurance Company with and into Central Wisconsin Mutual Insurance Company​
  

• Henrietta, Greenwood & Union Mutual Fire Insurance Company with and into River Valley Mutual Insurance Company​
  

• Clarno Mutual Insurance Company with and into Mt. Morris Mutual Insurance Company​
  

• Dupont Mutual Insurance Company with and into Maple Valley Mutual Insurance Company​
  

• Washington Town Mutual Insurance Company with and into Homestead Insurance Company​​
  

• Ellington Mutual Insurance Company with and into Homestead Mutual Insurance Company​​
  

• Northeastern Mutual Insurance Company with and into Homestead Mutual Insurance Company​
  

• Spring Grove Mutual Insurance Company with and into LaPrairie Mutual Insurance Company​
  

• New Hope Mutual Insurance Company with and into Seneca, Sigel Mutual Insurance Company​
  

• Northern Finnish Mutual Insurance Company with and into Mt. Morris Mutual Insurance Company​
  

• Columbus Mutual Town Insurance Company and Caledonia Mutual Fire Insurance Company with and into Central Wisconsin Mutual Insurance Company​​
  

• Fall Creek Mutual Insurance Company with and into Mutual of Wausau Insurance Corporation​
  

• All-Star/Newark Mutual Insurance Company with and into Franklin Farmers Mutual Insurance Company​
  

• Tri-County Mutual Town Insurance Company with and into Mt. Morris Mutual Insurance Company​
  

• Kenosha County Mutual Insurance Company with and into Mt. Morris Mutual Insurance Company
  

• Racine County Mutual Insurance Company with and into Mt. Morris Mutual Insurance Company
  

• Bristol Town Insurance Company with and into Forward Mutual Insurance Company​​
  

• Yorkville and Mt. Pleasant Mutual Insurance Company with and into Mutual of Wausau Insurance Corporation​​
  

• Marcellon-Courtland-Springvale Mutual Insurance Company with and into Mt. Morris Mutual Insurance Company​
  

• Trade Lake Mutual Insurance Company with and into River Falls Mutual Insurance Company​
  

• Luck Mutual Insurance Company and Barron Mutual Insurance Company with and into Eagle Point Mutual Insurance Company​
  

• Pella Mutual Insurance Company with and into Mutual of Wausau Insurance Corporation​​
  

• Holland Mutual Fire Insurance Company with and into Theresa Mutual Insurance Company​
  

• Farmers Town Mutual Insurance Company with and into Arlington Mutual Insurance Company​
  

• Berry & Roxbury Mutual Insurance Company with and into Merrimac Lodi Mutual Insurance Company​
  

• Southeast Mutual Insurance Company into Sugar Creek Mutual Insurance Company​
  

• Merger of MGIC Reinsurance Corporation of Wisconsin, with and into Mortgage Guaranty Insurance Corporation, and change in the direct control of MGIC Credit Assurance Corporation​ from Mortgage Guaranty Insurance Corporation to MGIC Investment Corporation

• National Mutual Benefit, with and into Western Fraternal Life Association

• Care Wisconsin First, Inc. with and into My Choice Family Care, Inc., and Trilogy Health Insurance, Inc. with and into Care Wisconsin Health Plan, Inc.

• Sheboygan Falls Insurance Company, with and into Atlantic States Insurance Company

• Affiliated Change in Control and Dissolution of Thrivent Life Insurance Company
  

• Little Black Mutual Insurance Company, with and into Farmington Mutual Insurance Company

• Main Street America Group Mutual Holdings, Inc., with and into American Family Insurance Mutual Holding Company

• Lutheran Brotherhood with Aid Association for Lutherans​​

• Anthem, Inc. and Wellpoint Health Networks, Inc., and the Acquisition of Control of Crossroads Acquisition Corp. and its Wisconsin Domestic Insurance Subsidiaries​

• CUNA Mutual Insurance Society, CUMIS Insurance Society, Inc., and MEMBERS Life Insurance Company from the State of Wisconsin to the State of Iowa

• National Guardian Life Insurance Company to a Mutual Holding Company and a Stock Insurance Company​​
  

• West Bend Mutual Insurance Company to a Mutual Holding Company and a Stock Insurance Company​
  

• SECURA INSURANCE, A Mutual Company to a Mutual Holding Company and a Stock Insurance Company

• Sentry Insurance a Mutual Company to a Mutual Holding Company and a Stock Insurance Company

• Jewelers Mutual Insurance Company to a Mutual Holding Company and a Stock Insurance Company

• Church Mutual Insurance Company to a Mutual Holding Company and a Stock Insurance Company

• American Family Mutual Insurance Company to a Mutual Holding Company and a Stock Insurance Company

• Milwaukee Mutual Insurance Company to a Mutual Holding Company and a Stock Insurance Company

• Employers Insurance of Wausau to a Mutual Holding Company and Stock Insurance Company