Private company

Mitsui Sumitomo Insurance Company

Logo: Extracted from MSIG Annual Report 2008, Non-free logo, via Wikipedia4

Japanese insurance holding company

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, Mitsui Sumitomo Kaijō Gurūpu Hōrudingusu Kabushiki-Kaisha) was 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.2 It is part of MS&AD Insurance Group Holdings.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

2000Founded1
  • Industryinsurance company1
  • HeadquartersTokyo1
  • Websitewww.ms-ins.com
  • Legal formkabushiki gaisha1
  • LEI5493006KRZ0SJO41LZ833
  • StatusActive3
  • LEI statusIssued and current3
  • Registered address神田駿河台3-9, 101-8011 東京都 千代田区, Japan3
  • Registered withLegal Affairs Bureau, 0100-01-0087953

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, Mitsui Sumitomo Kaijō Gurūpu Hōrudingusu Kabushiki-Kaisha) was a Japanese insurance holding company headquartered in Tokyo, Japan.2

Corporate structure

Mitsui Sumitomo Insurance Company is part of a group headed by MS&AD Insurance Group Holdings. 28 entities, 10 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

  • MS&AD Insurance Group Holdings 東京都, Japan
    • Mitsui Sumitomo Insurance Company 東京都 千代田区, Japan
      • Asuransi Jiwa Sinarmas MSIG Subsidiary
      • MITSUI SUMITOMO INSURANCE COMPANY (EUROPE), LIMITED Subsidiary · London, United Kingdom
      • MS AMLIN CORPORATE SERVICES LIMITED Subsidiary · London, United Kingdom
        • AUA INSOLVENCY RISK SERVICES LIMITED Subsidiary · London, United Kingdom
      • MS AMLIN HOLDINGS LIMITED Subsidiary · London, United Kingdom
        • AMLIN FRANCE LEGACY SERVICES SAS Subsidiary · Paris, France
        • MS AMLIN ASIA PACIFIC PTE. LTD. Subsidiary · Singapore, Singapore
        • MS AMLIN UNDERWRITING SERVICES LIMITED Subsidiary · London, United Kingdom
      • MS AMLIN INVESTMENT MANAGEMENT LIMITED Subsidiary · London, United Kingdom
      • MS AMLIN UNDERWRITING LIMITED Subsidiary · London, United Kingdom
      • MS First Capital Insurance Limited Subsidiary · Singapore, Singapore
      • MSIG EUROPE Subsidiary · Schaerbeek, Belgium
        • AMLIN NETHERLANDS HOLDING B.V. Subsidiary · Amstelveen, Netherlands
          • 1 more
        • MSIG EUROPE Branch · Schaerbeek, Belgium
      • MSIG Insurance (Hong Kong) Limited (三井住友海上火災保險(香港)有限公司) Subsidiary · Hong Kong, Hong Kong
      • MSIG INSURANCE (SINGAPORE) PTE. LTD. Subsidiary · Singapore, Singapore
    • Aioi Nissay Dowa Insurance Company Subsidiary · Shibuya, Japan
    • AIOI NISSAY DOWA EUROPE LIMITED Subsidiary · London, United Kingdom
    • AIOI NISSAY DOWA INSURANCE UK LIMITED Subsidiary · London, United Kingdom
    • MS AMLIN AG Subsidiary · Zürich, Switzerland
    • MS AMLIN CORPORATE MEMBER LIMITED Subsidiary · London, United Kingdom
    • MSI GuaranteedWeather Trading Ltd. Subsidiary · Hamilton, Bermuda
    • あいおいニッセイ同和損害保険株式会社 Subsidiary · 東京都 渋谷区, Japan
      • Aioi Nissay Dowa Songai Hoken Kabushikigaisha (Aioi Nissay Dowa Insurance Co., Ltd.) Subsidiary · London, United Kingdom
    • 三井住友海上あいおい生命保険株式会社 Subsidiary · 東京都 中央区, Japan

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

Products and brands

Financial services

Sumitomo Mitsui Asset Management Co

Venture Capital Co

Risk-related businesses

InterRisk Research Institute & Consulting

Mitsui Sumitomo Insurance Care Network Co

Read the full text

American Appraisal Japan Co

From Wikipedia’s article on Mitsui Sumitomo Insurance Group, shared under CC BY-SA 4.0.5

Subsidiaries and ownership

Parent company

Subsidiaries

From Wikidata.1

Timeline

  1. Apr 1, 2023Parent Directly consolidated by MS&AD Insurance Group Holdings3
  2. 2000Founded Founded1