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By combining deep captive expertise with industry-leading analytics, we can help your organization to use a captive insurance company to manage risk on your own terms.

50+ years’ captive experience… US$53.8+ billion in premium… Nearly 450 experts manage 1,380 captive insurers globally

As the world’s largest captive manager, organizations come to Marsh for a one-stop approach to innovative captive solutions, including advice, implementation, management, and actuarial services. With specialized expertise from global resources, Marsh creates comprehensive, tailored solutions for your business.

Data analytics and benchmarking abilities for Marsh Captive Solutions are unparallelled in the industry,  providing a powerful tool to identify trends and quantify the advantages that captive insurance can offer your organization.  Marsh’s deep captive insights and advisory capabilities may also help you understand how peer companies are benefiting from captive coverage.

The result: Managing risk on your own terms and more control over your company’s economic cost of risk.


Marsh’s captive advisory professionals can counsel your team on the pros and cons of establishing a captive and advise you of alternative applications that a captive can provide. As a result, you can make informed decisions before investing in this long-term risk management program.

Our key services include:

  • Feasibility studies.
  • Strategic reviews.
  • Domicile reviews.
  • Exit-strategy studies.

Continually monitoring the insurance market, Marsh’s captive advisory professionals can help you adjust your insurance program to changes in market conditions. We also maintain close working relationships with all major reinsurers, many of whom have business units dedicated to working with alternative insurance facilities such as captives.

Management Services

Location is critical to your captive’s success. Marsh’s captive professionals can recommend the most appropriate domicile, working with you to evaluate your business goals, as well as your potential domiciles’ infrastructure, tax structures, and treaties. Once you have selected a domicile, a designated team led by our captive management professionals guides the process, from incorporation to active day-to-day management.

Marsh has built long-lasting relationships with key service providers such as actuaries, attorneys, and auditors — all essential to the smooth operation of a captive.

We offer a wide range of services, including:

  • Strategic management.
  • Accounting.
  • Insurance-policy management.
  • Claims management.
  • Regulatory compliance.
Actuarial Services

Actuaries are a vital piece of any captive insurer’s operations, supporting sustainable and effective operations by evaluating multiple issues, including:

  • Loss-reserve certification.
  • Loss funding and payout projection.
  • Retention optimization.
  • Premium allocation.
  • Parent company self-retained liability analysis.

Actuaries also provide assistance in communications with other captive insurance stakeholders such as auditors, insurers, and insurance regulators.

Marsh Captive Solution's Actuarial Group includes credentialed actuaries and supporting actuarial analysts. Our actuaries consult exclusively with captive and self-insurance programs in numerous global domiciles.

Captive Benchmarking Services

How can my captive deliver more value? What are others doing with their captives? How does my captive stack up?

With our Captive Benchmarking Portal, we can help you answer these questions and more.

Learn more

Green Island Reinsurance Treaty

Green Island Reinsurance Treaty (Pooling Programs)

Green Island Reinsurance Treaty, established by Marsh in 1997 is a reinsurance pooling facility that enables participating captives to share their primary casualty or workers' compensation loss experience by transferring a portion of their risk in exchange for assuming the risks of other participants.

Potential advantages of participating in Green Island include:

  • Reduction in the variability of loss costs.
  • Ability to diversify a captive's (or cell's) underwriting portfolio.
  • Low frictional costs with no additional capital or surplus required if risk is currently written by the captive.
  • Source of unrelated premium for a captive (or cell) to help support insurance company tax treatment.

Learn more about Green Island Reinsurance Treaty.

Marsh Cell Captive Facilities

Marsh Captive Solutions is pleased to offer a variety of cell captive facilities under the Isosceles and Mangrove brands. These facilities allow clients to experience the advantages of an owned captive without assuming the administrative, capital, and governance costs of a single parent captive. We have a wealth of global expertise managing cell captive programs and can assist in creating a tailored cell solution. Marsh’s cell captive facilities are offered around the globe, each registered with the legislation of their corresponding jurisdiction.

Companies participating in the Isosceles and Mangrove cell captive facilities are insulated from the loss experience, liabilities, and credit risks of other participants. Consequently, participants can avoid potential costs, such as additional premium requirements or capital outlays that could arise in group captive arrangements when other participating firms have poor loss experience or more volatile risk profiles.

Learn more.