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January 22, 2026
Sidley Represents Ark in US$250 Million Outrigger Sidecar

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- Sidley advised Ark Insurance Holdings Limited, a subsidiary of White Mountains Insurance Group, Ltd., on the establishment of Outrigger Re Ltd., a reinsurance sidecar formed in Bermuda
- Outrigger Re is backed by US$250 million in investor capital from White Mountains, Aquiline Capital Partners, and a subsidiary of Enstar Group
- The sidecar will provide collateralized reinsurance capacity on a quota share basis for part of Ark’s global property catastrophe portfolio.
Sidley represented Ark Insurance Holdings Limited, the specialty property and casualty reinsurance and insurance subsidiary of Bermuda-based publicly traded White Mountains Insurance Group, Ltd., in the formation in Bermuda of its third-party capital-backed Outrigger Re Ltd. reinsurance sidecar.
Supported by US$250 million of total investor capital, including from White Mountains, Aquiline Capital Partners, and a subsidiary of Enstar Group, Outrigger will provide collateralized reinsurance capacity on a quota share basis for a portion of Ark’s global property catastrophe portfolio.
The Sidley team was led by Michael Pinsel, and included Jen Norris, J.P. Hong, Rana Odeh (all Insurance), Laura Barzilai, and Joel Lifshitz (both Tax).~~Sidley represented Ark Insurance Holdings Limited, the specialty property and casualty reinsurance and insurance subsidiary of Bermuda-based publicly traded White Mountains Insurance Group, Ltd., in the formation in Bermuda of its third-party capital-backed Outrigger Re Ltd. reinsurance sidecar.
Supported by US$250 million of total investor capital, including from White Mountains, Aquiline Capital Partners, and a subsidiary of Enstar Group, Outrigger will provide collateralized reinsurance capacity on a quota share basis for a portion of Ark’s global property catastrophe portfolio.
The Sidley team was led by Michael Pinsel, and included Jen Norris, J.P. Hong, Rana Odeh (all Insurance), Laura Barzilai, and Joel Lifshitz (both Tax).
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