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Private company

General Casualty Insurance

Wisconsin insurance provider

General Casualty Insurance was a super-regional property and casualty insurance provider headquartered in Sun Prairie, Wisconsin as of 2006. It operated as a subsidiary of Winterthur U.S. Holdings. Winterthur U.S. Holdings, which operated as Winterthur North America, and was also based in Sun Prairie, Wisconsin operated General Casualty Insurance, as well as Bellevue, Washington-based Unigard Insurance.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1925Founded1

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General Casualty Insurance was a super-regional property and casualty insurance provider headquartered in Sun Prairie, Wisconsin as of 2006. It operated as a subsidiary of Winterthur U.S. Holdings.2

The story

From 1956 to 1990, General Casualty was owned by Reliance Insurance. In 1990, General Casualty was sold to Winterthur, a Swiss Insurance Group.In 1997, Winterthur was sold to Credit Suisse Group.

In 2006, AXA Group acquired Winterthur from Credit Suisse.

In January 2007, QBE Insurance Group, Sydney, Australia, agreed to buy Winterthur U.S. Holdings, General Casualty's parent company, for $1.16 billion.

In 2011, QBE announced that the General Casualty name would be replaced with the QBE name and logo.

From Wikipedia’s article on General Casualty Insurance, shared under CC BY-SA 4.0.3

Timeline

  1. 1925Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

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