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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.

Nearly 50 years’ captive experience… US$40+ billion in premium… 430 experts manage 1,250 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.

Mangrove Insurance Solutions

Mangrove Insurance Solutions PCC and Mangrove Insurance Solutions PCC Limited, domiciled in Washington, DC and Isle of Man, are licensed insurance and reinsurance companies.

Companies participating in Mangrove PCC 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.

Mangrove PCC, established by Marsh Captive Solutions, is well-suited for:

  • Small and midsize businesses seeking cost-effective risk-financing alternatives.
  • Larger firms looking to segregate retained risks associated with joint ventures, strategic alliances, and other special situations.

Benefits of Mangrove Insurance Solutions

Mangrove PCC is a cost effective risk-financing vehicle that offers companies benefits similar to those available through group and single-parent captives, such as access to the reinsurance markets, optimization of risk transfer and risk retention, and coverage for uninsurable or difficult-to-place risks.

Additional benefits of the Mangrove PCC include:

  • Reduced start-up and operating costs through sharing of the audit firm, actuarial firms, and regulatory fees with the other cell owners.
  • Potentially quicker licensing timeframes and minimal time commitment compared to a traditional captive.

Marsh Captive Solutions offers Mangrove PCC participants the expertise and knowledge provided by a global network of captive colleagues.

Choosing the Right PCC Domicile

Mangrove PCC has been set up in two domiciles (Isle of Man and Washington, DC) to:

  • Take advantage of favorable regulatory environments toward captives.
  • Serve the needs of companies that are based in the US or UK, or have the majority of their exposures in those countries.

Learn more about Mangrove: