Mitsui Sumitomo Insurance Group

Mitsui Sumitomo Insurance Group Holdings, Inc. (三井住友海上グループホールディングス株式会社) is a Japanese insurance holding company headquartered in Tokyo, Japan.

MSIG was formed in 2001 from the merger of Mitsui Marine & Fire Insurance Co. (itself descended from the Taishō Marine and Fire Insurance Co. founded in 1918) and The Sumitomo Marine & Fire Insurance. In 2010, April Aioi Insurance Co., Ltd., Nissay Dowa General Insurance Co., Ltd., merged into MSIG, making the group's name changed in to MS&AD Insurance Group Holdings, Inc.. According to this business integration, MS&AD has become the largest property insurance company in Japan, with market share of 33% in 2013.

On 8 September 2015, it was announced that Mitsui Sumitomo had agreed to buy the UK insurance firm Amlin for £3.5bn.

Non-life insurance

 * Mitsui Sumitomo Insurance Co

Life insurance

 * Mitsui Sumitomo Kirameki Life Insurance Co
 * Mitsui Sumitomo MetLife insurance Co

Companies not based in Japan

 * Amlin
 * Cholamandalam MS General Insurance
 * MSIG Insurance Europe
 * MSIG Insurance Vietnam Company
 * MS Frontier Reinsurance
 * MS First Capital Insurance
 * Mitsui Sumitomo Reinsurance
 * Mitsui Sumitomo Insurance London Management
 * MSI GuaranteedWeathere
 * part
 * Mitsui Sumitomo Insurance

Financial services

 * Sumitomo Mitsui Asset Management Co
 * Venture Capital Co

Risk-related businesses

 * InterRisk Research Institute & Consulting
 * Mitsui Sumitomo Insurance Care Network Co
 * American Appraisal Japan Co

Annual Reports

 * MSIG Annual Report 2008
 * MSIG Annual Report 2014