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Sirius International Insurance Group
Sirius International Insurance Group underwrites specialty insurance and reinsurance from offices in New York, London, and Bermuda.
Sirius International Insurance Group
Sirius International Insurance Group was formed through a series of consolidations in the specialty insurance market, drawing together underwriting talent from multiple legacy carriers. The firm operates as a Bermuda-based insurer with additional hubs in the US and UK, providing capacity for complex and hard-to-place risks that standard carriers avoid. Its strategy focuses on property, casualty, marine, and specialty lines, where it uses deep actuarial analysis and risk selection to maintain underwriting profitability. Sector tags include Insurance, Reinsurance, Property & Casualty, and Specialty Insurance. The firm has disclosed no named portfolio companies or direct investments, as it operates as a balance-sheet underwriter rather than an asset manager. Geographically, it writes risks across North America, Europe, and other select markets. The firm maintains financial strength ratings from AM Best and other agencies, though a specific team size is not publicly available. Additional offices are in London, Pembroke, Farmington, and Hamilton. The firm has not publicly disclosed any major operational events in the last 24 months (public record). A structural differentiator is Sirius's focus on specialty and casualty lines rather than catastrophe-exposed property, which distinguishes it from many Bermuda peers. The firm relies on broker relationships and internal underwriting expertise to source business, rather than a large distribution network (public record).
General information
Firm type
Insurance
Year founded
—
AUM
Undisclosed
Location
Region
North America
Country
United States
City
New York
Corporate office
New York, NY, United States
Additional offices
London, UK · Pembroke, Bermuda · Farmington, CT, United States · Hamilton, Bermuda
Sector focus
Frequently asked questions
Who underwrites decisions at Sirius International Insurance Group?
Sirius International Insurance Group's underwriting decisions are made by its internal team of specialty underwriters, led by senior executives whose names are not publicly listed on the firm's website. The firm emphasizes actuarial rigor and broker relationships in its underwriting process (public record).
Is Sirius structured as a single family office or an insurance carrier?
Sirius International Insurance Group is a commercial insurance and reinsurance carrier, not a family office. It underwrites specialty policies and reinsurance for third-party clients, with capital sourced from its balance sheet and institutional investors (public record).
What types of risks does Sirius underwrite?
Sirius underwrites property, casualty, marine, and specialty insurance and reinsurance. It avoids catastrophe-prone lines, focusing on complex or hard-to-place risks where its analytical edge provides an advantage (public record).
Does Sirius make direct equity investments or fund commitments?
Sirius International Insurance Group does not publicly disclose direct equity investments or fund commitments. Its primary business is underwriting insurance and reinsurance contracts, not asset management (public record).
What regions does Sirius operate in?
Sirius operates from offices in New York, London, Pembroke (Bermuda), Farmington (Connecticut), and Hamilton (Bermuda). It writes risks across North America, Europe, and other select markets (public record).
How is Sirius related to other insurance or investment entities?
Sirius International Insurance Group operates as a standalone insurance carrier. No public record identifies direct ownership by a family office, though its capital structure may include institutional backers (public record).
What is Sirius's financial strength rating?
Sirius International Insurance Group holds an AM Best financial strength rating of A (Excellent), indicating strong underwriting discipline and capital adequacy (per AM Best, various years).
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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