Protected Cell Company

A protected cell company is a single legal entity that is divided into individual, legally segregated compartments called cells, each with its own assets and liabilities that cannot be mixed with those of any other cell or the core company. The structure originated in Guernsey in 1997 and now exists across major insurance domiciles including Bermuda, the Cayman Islands, Malta, Ireland, and multiple U.S. states. Each cell operates as if it were a separate insurance company, but all cells share one corporate infrastructure, one board of directors, and one regulatory license.

Think of it as an office building where every tenant has their own completely separate vault that no other tenant can touch.

How the Core and Cells Work Together

The core is the foundational capital and infrastructure that the entire protected cell company sits on top of. It holds the regulatory capital required to maintain the company's insurance license and provides shared administrative services to all cells. Cells are the individual compartments that participants rent or own to run their own insurance programs.

The legal firewall between cells is the defining feature. Montana's statute, for example, explicitly states that the assets of a protected cell may not be charged with liabilities arising from any other insurance business of the protected cell company. That firewall is statutory, not just contractual, meaning it holds even if the protected cell company as a whole becomes distressed.

Why Companies Use Protected Cell Companies

The alternative to participating in a protected cell company is forming your own standalone captive insurance company. That process typically takes a year or more, requires significant capital investment, and involves ongoing administrative, actuarial, and compliance costs that you must bear entirely.

A protected cell company eliminates those startup costs because the infrastructure already exists. A company wanting to take on its workers' compensation risk or fund its large property deductibles can rent a cell in an established facility, start in a few weeks rather than a year, and pay a portion of the shared infrastructure costs rather than all of them.

The Main Uses of a Protected Cell

• Funding increased deductibles: A company with $1 million per-occurrence deductibles on its property or liability program can hold that risk in a cell rather than paying it to a commercial insurer.
• Accessing reinsurance markets: A cell can issue insurance policies and access reinsurance directly, bypassing layers of commercial market intermediaries.
• Writing niche risks: When standard coverage is unavailable or priced prohibitively, a cell can underwrite the risk at a price reflecting actual loss experience rather than market pricing.
• Managing business unit risk separately: A large enterprise can create separate cells for each operating division, keeping the financial results of one business line from contaminating another.

The One Risk That Does Not Go Away

The statutory firewall protects cells from each other. It does not protect a cell from its own insolvency. If the losses in your cell exceed the assets you put in, you bear those losses. And if the core company itself becomes insolvent, the whole protected cell company structure is potentially at risk depending on domicile law.

The other persistent risk is counterparty conflict of interest. When the same company manages both the core facility and your cell, its financial interests in maximizing fee income may not always align with yours in minimizing losses and costs. Most sophisticated buyers require independent trustees or third-party oversight on their cells to manage this tension.

What Protected Cell Companies Are Called in Other Domiciles

The same structure goes by different names depending on jurisdiction. Bermuda calls them segregated account companies. The Cayman Islands calls them segregated portfolio companies. Many U.S. states use sponsored captive as the governing term. Some jurisdictions also have incorporated cell companies, which go one step further by making each cell its own incorporated legal entity rather than merely a statutory subdivision, offering slightly more robust legal separation than a standard protected cell.

Sources

• https://en.wikipedia.org/wiki/Cell_captive
• https://www.captive.com/articles/what-is-a-protected-or-segregated-cell-captive
• https://www.captiveinternational.com/protected-cells-and-series-captives-why-structures-matter-in-todays-market