mac casualty

What mac casualty does

MAC Casualty Ltd. is a member-owned group captive insurance company licensed in the Cayman Islands and founded in 1996 to give mid-sized companies an alternative to the traditional commercial insurance market. The company reinsures Workers' Compensation, General Liability, Automobile Liability, and Physical Damage coverages from U.S.-licensed carrier Zurich North America, and offers Property coverage to casualty members through a separate captive option. Members become shareholders by paying a one-time $36,000 capitalization contribution and committing to a minimum $350,000 in annual casualty premium; each shareholder has one equal vote regardless of premium size and appoints a Director to the Board. Underwriting is delivered through service partners Captive Resources, LLC (insurance consultant), Gallagher Bassett Services, Inc. (third-party claims and loss control administrator), Edgewater Actuarial Insights (actuarial services), and PricewaterhouseCoopers (auditor), with Kensington Management Group, Ltd. acting as insurance manager.

The technology stack is largely relational rather than proprietary: a web-based Risk Platform and secure Member Portal host safety training, financial reports, board summaries, and a webinar/recording library, and banking infrastructure is spread across UBS, Comerica, Mizuho, and Scotiabank & Trust (Cayman). There is no disclosed AI/ML, no patents, and no product surface beyond the captive, portal, and educational programming — differentiation sits in the captive structure, peer network, and risk-sharing economics rather than in technology. As of February 28, 2025, MAC reports 213 shareholders (100+ active), $109M in gross earned premium, $22.1M in investment income, a 31% incurred loss ratio, and $119.4M in total distributions returned to members since inception.

Revenue mechanics are essentially premium-driven subscription: members pay actuarially tailored annual premiums calibrated to their own loss experience rather than market rates, supplemented by investment income on accumulated captive assets, with residual surplus returned as dividends. The go-to-market is invitation- and referral-driven — prospective members must pass individualized underwriting analysis and are introduced largely through a Membership Development Committee and existing member networks. The explicit out-of-scope areas include any external sales channel, third-party distribution, or geographic market data; MAC's stated geographic restriction is U.S. mid-market casualty insurance, with the Cayman Islands used solely as the corporate/reinsurance domicile.

Name

mac casualty

Legal name

MAC Casualty Ltd.

Website

https://maccasualty.com

Company type

Private

Founded year

1996

Operating status

Operating

Short description

MAC Casualty Ltd. is a member-owned Cayman-domiciled group captive insurance company founded in 1996 that reinsures Workers' Compensation, General Liability, Automobile Liability, and Physical Damage from Zurich North America, serving financially strong mid-sized U.S. companies that commit minimum annual casualty premiums of $350,000 plus a one-time capitalization contribution.

Ownership category

akta.pro rank

Product category

Captive Insurance

NAICS

Reinsurance Carriers (524130)

SIC

Fire, Marine & Casualty Insurance (6331)

akta.pro primary industry

Captive Insurance Advisory & Management (FSAEADAF)

Keywords

• Captive insurance
• Workers compensation
• Group captive program
• Reinsurance services
• Risk management solutions

Headquarters

HQ city

George Town

HQ country

Cayman Islands

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure, Others

Revenue model

1. Insurance Premiums (Reinsurance): MAC Casualty Ltd. reinsures Workers' Compensation, General Liability, Automobile Liability, and Physical Damage risks from Zurich North America. Member companies pay actuarially tailored annual premiums based on their individual performance and safety records. Property coverage is available through another captive option. Premiums are not market rates but performance-based rates reflecting company-specific risk.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

MAC Casualty Ltd. is a member-owned group captive insurance company that reinsures Workers' Compensation, General Liability, Automobile Liability, and Physical Damage risks from U.S.-licensed policy-issuing carrier Zurich North America. Members pay actuarially tailored annual premiums based on their individual loss experience and safety performance rather than market rates, with the captive providing equal-vote shareholder governance and returning profits to members through dividends.

Product overview

MAC Casualty Ltd. operates as a member-owned group captive insurance company offering a unified risk management platform. The core offering is the Group Captive Insurance Program, which provides Workers' Compensation, General Liability, Automobile Liability, and Physical Damage coverage through reinsurance with Zurich North America. Members access a digital Member Portal for real-time insights and document access. The service is enhanced by complementary modules including a specialized Risk Control Program with dedicated consultants, Claims Management Services administered by Gallagher Bassett, twice-yearly Risk Control Workshops, a Digital Safety Library with training resources, and monthly webinars. Property coverage is available as an add-on option through a separate captive arrangement.

Differentiator

Problem solved

Functional benefit

Products and services

• Group Captive Insurance Program A member-owned captive insurance program providing Workers' Compensation, General Liability, Automobile Liability, and Physical Damage coverage through reinsurance arrangements with Zurich North America, designed for mid-sized companies seeking long-term insurance cost stability and shared ownership of their risk program.
• Property Coverage Option Property coverage available to all casualty members through a separate captive option, complementing the core casualty insurance program offered by MAC Casualty.

Quantifiable outcome

• $119.4M in total distributions returned to members over time
• +3 more outcomes

Named customers6 records

Segments2 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Ten partnerships are on record, tiered core and supporting.

• Captive Resources, LLCcoreImplementation/ SI/ Consulting PartnerInsurance consultant providing advisory capacity and support for MAC's operations. Assigns members of claims and risk control staff as member advocates. Has helped mid-market companies become insurance company owners for over four decades, supporting over 50 group captives across various industries.
• Gallagher Bassett Services, Inc.coreTechnology or IntegrationThird-party administrator (TPA) handling claims with authority for claims management. Also provides specialized loss control consulting services. Prepares special claim handling instructions for each member's specific needs. Leverages leading technology for claims administration with customized handling instructions.
• Zurich North AmericacoreStrategic or Co-development PartnerPolicy-issuing carrier for Workers' Compensation, General Liability, Automobile Liability, and Physical Damage. MAC reinsures these coverages from Zurich, gaining the control of a global structure backed by the security of a recognized U.S. carrier.
• Kensington Management Group, Ltd.coreImplementation/ SI/ Consulting PartnerInsurance manager responsible for day-to-day operations of MAC Casualty Ltd. Located in George Town, Grand Cayman, Cayman Islands. Handles member communications, regulatory compliance oversight, and general business administration including IT systems administration.
• PricewaterhouseCooperssupportingOthersIndependent auditor providing audit services for MAC's financial statements and ensuring member financial compliance.
• Edgewater Actuarial Insights, LLCsupportingOthersActuarial services provider supporting premium pricing calculations and actuarial analysis for MAC's reinsurance program.
• UBSsupportingOthersCredit bank providing banking services as part of MAC's financial infrastructure.
• ComericasupportingOthersCredit bank providing banking services as part of MAC's financial infrastructure.
• MizuhosupportingOthersCredit bank providing banking services as part of MAC's financial infrastructure.
• Scotiabank & Trust (Cayman) Ltd.supportingOthersOperating bank for MAC Casualty Ltd., providing day-to-day banking operations in the Cayman Islands jurisdiction.

Scale indicators7 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Zenith Insurance Company: Specialty workers' compensation insurer serving mid-market and large employers. Competes directly with MAC for casualty premium from the same mid-sized employer segment, particularly in California and multi-state accounts, while operating as a traditional carrier rather than a captive.
• ICW Group: Policyholder-owned workers' comp mutual serving mid-sized employers. Comparable to MAC through its mutual/ownership orientation, mid-market customer base, and focus on workers' comp underwriting discipline, but delivered through a traditional mutual carrier structure rather than a group captive.
• AmTrust Financial Services: Large specialty P&C insurer with significant workers' comp and small/mid-market commercial casualty business. Competes with MAC for casualty premium dollars from mid-sized employers, particularly in industries like retail, hospitality, and light manufacturing that overlap with MAC's member base.
• Accident Fund Holdings: Workers' compensation specialty carrier serving mid-market employers across multiple states. Directly comparable to MAC's core workers' comp offering and competes for similar casualty premium volumes, though delivered as a traditional insurance product rather than a member-owned captive.
• Sentry Insurance: Policyholder-owned mutual insurer providing commercial casualty and workers' comp to mid-sized businesses. Comparable to MAC in its mutual ownership ethos and mid-market employer focus, offering an alternative model for buyers seeking ownership-aligned insurance without forming a captive.
• Berkshire Hathaway Homestate Companies: Workers' compensation specialist within Berkshire Hathaway serving mid-market employers. Competes directly with MAC for the same workers' comp premium dollars, leveraging balance-sheet strength and disciplined underwriting against MAC's member-owned governance model.
• Employers Holdings (EIG): Workers' compensation specialty insurer focused on small and mid-market businesses. Targets the same casualty premium threshold and customer profile as MAC, with workers' comp as its primary line, competing head-to-head for accounts in MAC's member industries.

Regional players

• Builders Mutual Insurance: Construction-industry mutual providing workers' comp and commercial casualty to mid-sized contractors. Comparable to MAC in mutual ownership structure and mid-market employer focus, but specialized to the construction industry and concentrated in the Southeastern U.S. rather than operating as a generalist captive.

Emerging players

• Pie Insurance: Tech-enabled workers' comp carrier targeting small and mid-market employers with direct digital distribution. Comparable to MAC in pursuing the underserved mid-market workers' comp segment, but competes on price and ease of purchase rather than ownership and governance participation.
• NEXT Insurance: Tech-enabled commercial insurance carrier offering workers' comp, general liability, and auto coverage to small and mid-sized businesses. Competes with MAC for the same commercial casualty premium from mid-market employers, differentiated by digital-first distribution versus MAC's member-governance model.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about mac casualty