About Us

Mitsui Sumitomo Marine Management (U.S.A.), Inc.  (MSMM) is the U.S. subsidiary of MS & AD Insurance Group Holdings, Inc., one of the world’s top ten property/casualty insurance carriers with locations in more than 40 countries & regions and over 38,000 employees worldwide.

MSMM manages the business affairs of two insurance companies: Mitsui Sumitomo Insurance Company of America and Mitsui Sumitomo Insurance USA Inc., both rated A+ (Superior) by A.M. Best Company.

MSMM specializes in providing commercial property and casualty insurance products and services to its customers in the United States.

In joining MSMM, you are becoming part of a worldwide team that is dedicated to:

  • Making a lasting contribution to the enrichment of society by bringing security and safety to people and businesses around the world.
  • Realizing customer satisfaction by providing the finest products and services to consistently meet their growing needs.
  • Meeting our shareholders’ expectations and strengthening their trust in us by continuously improving our business.

We value each employee’s unique set of skills and contributions and believe that each employee plays an important role in the success of MSMM.