About Us
A Closer Look at Who We Are

As part of a global initiative to provide leading insurance products, MSIG supports its clients with customized services and solutions. With offices located throughout the Americas, we offer the attention and dedicated focus our clients need to identify their unique risks and effectively manage them.

MSIG is MSIG Holdings (U.S.A.), Inc., Mitsui Sumitomo Marine Management (U.S.A.), Inc. the managing company for the insurance companies located in the United States, comprised of Mitsui Sumitomo Insurance Company of America (MSIA), Mitsui Sumitomo Insurance USA Inc. (MSU) and MSIG Specialty Insurance USA Inc. (MSIGS).

MSIG operates as a member of MS&AD Insurance Group Holdings Inc., one of the world’s top property and casualty insurance providers located in Japan. Our U.S. operation plays a pivotal role in our parent company’s global operations spanning more than 40 countries and regions. In the Americas, our MSIG network reaches from Canada to Brazil and MSIG-affiliated companies such as MSI Guaranteed Weather and MS Amlin provide a wide range of special insurance products.

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View a map showing our different offices in the Americas.
Launch Map


Group Structure



Welcome to MSIG

As a member of MS&AD Insurance Group Holdings Inc., MSIG is privileged to support the efforts of our Japanese parent company. MSIG affiliated companies MSU and MSIA are rated A+ by A.M. Best Company1 and employ many talented property and casualty insurance experts. Our team consists of more than 400 professionals, each equally committed to your business’s goals and long-term success.

MSIG was established with a mission to assist the U.S.-based companies of our parent. Through the years, we have faithfully served our clients and often exceeded their expectations for quality service. Today, we continue these efforts to support businesses across the Americas.

MSIG is admitted in all P&C lines in all 50 states, as well as the District of Columbia and Puerto Rico. Our underwriters, claims representatives, risk engineers and other experts work together to benefit you, our client. Highly experienced in all facets of P&C risk, we offer the tools, resources and expertise your business needs to keep moving forward. From our product offerings to our 24/7 claims handling procedures, we hold ourselves to the highest standards in order to meet yours.

In our ever-changing world, you can’t predict every risk. But when you partner with MSIG, we strive to deliver certainty—certainty that your business has a path to success and certainty that MSIG, as your insurer, can help get you there.

Our Promoting Brands Worldwide


Financial Strength & Credit Ratings

A+ 1
A.M. Best Company
A+ 2
Standard & Poor's

1 For Mitsui Sumitomo Insurance Company of America, Mitsui Sumitomo Insurance USA Inc., and MSIG Specialty Insurance USA Inc.
2 Standard & Poor’s rating applicable to Mitsui Sumitomo Insurance Company of America, Mitsui Sumitomo Insurance USA Inc. and MSIG Specialty Insurance USA Inc. For the latest rating information, access ambest.com.

Products & Solutions

What We Do

Insurance touches only the surface of what we do at MSIG. With a full understanding of your industry-specific needs, we tailor our programs and products entirely to you.

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Bettering Society - And Your Future

We are privileged to benefit not only our clients, but also our society. If you seek a rewarding, team-focused career that positively impacts businesses and lives, then MSIG is right for you.

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We're Here to Help

Contact MSIG

Our offices are strategically located across the United States for your convenience and peace of mind. Whenever you need us, MSIG is nearby and ready to assist you.

Contact Us


199 Bay Street, Suite 2500
P.O. Box 139, Commerce Court Postal Station
Toronto, ON M5L 1E2 Canada
TEL 1-416-359-3190


Division MSIG, c/o Mapfre México S.A.

Av. Revolución 507,
Col. San Pedro de los Pinos,
Del. Benito Juarez, CP. 03800,
Ciudad de México
TEL 52-55-5950-7976

Division MSIG, Mapfre México S.A., Irapuato Office

Blvd. Diaz Ordaz 1370,
T805 Jardines de Irapuato C.P. 36660 Irapuato,
TEL 52-462-624-5033

Division MSIG, Mapfre México S.A., Querétaro Office

Blvd. Bernardo Quintana No. 300 Torre 57,
Col. Centro Sur Querétaro,
Qro. C.P. 76090,
TEL 52-442-245-3119


c/o Edificio Mapfre Panama,
Piso 5, Costa del Este,
Diagonal al Business Park,
Panama City. Panama
TEL 507-210-0133


Calle Mártir José Olaya 129,
Piso 5 Oficina 505,
Torre A - Centro Empresarial José Pardo,
Lima, Perú
TEL 51-1-447-3313


Calle 98 No. 9A-46 OFICINA 501A Edificio Parque Chico 99 Torre II Bogotá,
TEL 57-1-256-9570

Buenos Aires:

Juana Manso 590 Piso 29 A 1 - Puerto Madero
Ciudad Autónoma de Buenos Aires Republica Argentina Codigo
TEL 54-11-5217-9309

Mitsui Sumitomo Seguros (Brazil)

Alameda Santos 415, 5 andar,
Cerqueira Cesar, CEP01419-000
Sao Paulo, SP, Brasil

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