Private company
Who owns Greysbridge Holdings Ltd.
One company in the researched set discloses a stake in Greysbridge Holdings Ltd., worth $554m between them. Greysbridge Holdings Ltd. is private, so no 13F reports it: a 13F covers exchange listed positions only. These figures exist because each holder disclosed the stake in its own filings.
Greysbridge Holdings Ltd. - Profile
- Type
- private company
- Based in
- Bermuda
- Founded
- 2020
Greysbridge Holdings Ltd. is a Bermuda holding company created in 2020 as the acquisition vehicle for Watford Holdings Ltd., the Nasdaq listed parent of the Bermuda reinsurer Watford Re. The merger closed on 1 July 2021 at $35.00 a share in cash, funded by equity from Arch Reinsurance Ltd. and funds managed by Kelso & Company and Warburg Pincus, and Watford became a wholly owned subsidiary of the holding company. Watford had been launched in 2014 as a total return reinsurer, pairing underwriting sourced from Arch with a credit heavy investment portfolio; after the takeover the group was renamed Somers Group Holdings and its operating company Somers Re, and it moved to a conventional reinsurance model with a more conservative investment approach. Somers Re writes property and casualty insurance, reinsurance and mortgage insurance worldwide, while Greysbridge itself is a holding company with no operations.
Source
Greysbridge Holdings Ltd. files nothing with the SEC, so none of this comes from a filer record. The description was written for this site in August 2026 from Arch Capital Group Schedule 13D/A on Watford Holdings, Arch Capital Group press release: closing of the Watford Holdings acquisition and Insurance Journal: Arch rebrands Watford Re as Somers Re. The ownership figures below come from the holders' filings instead, and are sourced row by row.
The disclosed stakes
One row per position. Where a holder reports the same company in two share classes, both rows are shown rather than summed, because the class is part of a position's identity.
Where each figure comes from
A private stake has no ownership form behind it, so the source is always the holder's own filing or disclosure. Anything modelled says so, with the arithmetic.
- Arch Capital Group Ltd. (ACGL), as of 30 Jun 2026. Arch's Q2 2026 10-Q (note 8, Investments in Operating Affiliates) states: 'As of June 30, 2026, the Company owned 31.75% of Greysbridge with a carrying value of $554 million, compared to a 30% ownership interest with a carrying value of $486 million at December 31, 2025. The increase in share ownership is a result of the settlement of certain put options during the second quarter of 2026.' Greysbridge Holdings Ltd. wholly owns Somers Group Holdings Ltd. and its subsidiaries (formerly Watford Holdings Ltd. / Watford Re Ltd., collectively 'Somers'), so this is how Arch's economic exposure to Somers is now held; Arch itself holds no Somers shares directly any more. Per the FY2025 10-K: Arch first acquired approximately 11% of Somers Holdings Ltd. (then Watford Holdings Ltd.) directly in 2014; in 2021 Somers became a wholly owned subsidiary of newly formed Greysbridge Holdings Ltd. (Somers was acquired by Greysbridge for $35.00 per Somers common share), and Arch's direct Somers stake converted into a Greysbridge stake alongside third-party co-investors. Arch's Greysbridge percentage: 40% at 31 Dec 2024, 30% at 31 Dec 2025, 31.75% at 30 Jun 2026 (the Q2 2026 rise came from put-option settlements). Pursuant to the Greysbridge shareholder agreement, Arch has a call right (not an obligation) and third-party investors have put rights on a specified amount of their initial common shares annually at Greysbridge's year-end book value per share; Arch's balance sheet carried $163 million in both other assets and other liabilities at 30 Jun 2026 for outstanding put notices, with related transactions expected to close during the 2026 calendar year. No hits for 'Watford' anywhere in the Q2 2026 10-Q text: the entity is referred to throughout only as Somers. sourcesource 2
What this page is not
It is not a complete register. It lists the holders who happen to be inside the researched set and disclosed the stake themselves. A private company can have many other shareholders, and nothing here rules them out: venture investors, founders and employees usually appear in no public filing at all. Percentages are of Greysbridge Holdings Ltd. where a holder stated one, and are missing where no holder did.