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COLLATERALIZED REINSURANCE, TRUST AGREEMENTS AND OTHER RESTRICTED ASSETS | 9 Months Ended
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Sep. 30, 2025
Collateralized Reinsurance And Trust Agreements [Abstract] |
COLLATERALIZED REINSURANCE, TRUST AGREEMENTS AND OTHER RESTRICTED ASSETS | COLLATERALIZED REINSURANCE, TRUST AGREEMENTS AND OTHER RESTRICTED ASSETS The Company maintains certain restricted assets as security for potential future obligations, primarily to support its underwriting operations. The following table summarizes the Company’s restricted assets:
| At September 30, |  | At December 31,
(Dollars in millions) | 2025 |  | 2024
Collateral in trust for non-affiliated agreements | $ | 3,401 |  |  | $ | 3,241 |
Collateral for secured letter of credit facilities | 804 |  |  | 1,386 |
Collateral for FHLB borrowings | 1,304 |  |  | 1,294 |
Securities on deposit with or regulated by government authorities | 1,452 |  |  | 1,406 |
Funds at Lloyd's | 308 |  |  | 341 |
Funds held by reinsureds | 1,256 |  |  | 1,218 |
Total restricted assets | 8,526 |  |  | 8,885 |
Restricted cash is included in cash on the consolidated balance sheets. At September 30, 2025 and December 31, 2024, the Company had restricted cash of $144 million and $397 million, respectively. Total restricted cash includes amounts on deposit in trust accounts for non-affiliated agreements and secured letter of credit facilities. The Company reinsures some of its catastrophe exposures with the segregated accounts of a subsidiary, Mt. Logan Re, Ltd. (“Mt. Logan Re”). Mt. Logan Re is a collateralized insurer registered in Bermuda and 100% of the voting common shares are owned by Group. Each segregated account invests predominantly in a diversified set of catastrophe exposures, diversified by risk/peril and across different geographic regions globally. The following table summarizes the premiums and losses that are ceded by the Company to Mt. Logan Re segregated accounts and assumed by the Company from Mt. Logan Re segregated accounts.
| Three Months Ended September 30, |  | Nine Months Ended September 30,
Mt. Logan Re Segregated Accounts | 2025 |  | 2024 |  | 2025 |  | 2024
(Dollars in millions) |  |  |  |  |  |  |
Ceded written premiums | $ | 115 |  |  | $ | 235 |  |  | $ | 365 |  |  | $ | 404 |
Ceded earned premiums | 113 |  |  | 79 |  |  | 330 |  |  | 260 |
Ceded losses and LAE | 13 |  |  | 44 |  |  | 135 |  |  | 107 |
Assumed written premiums | 4 |  |  | 4 |  |  | 9 |  |  | 6 |
Assumed earned premiums | 4 |  |  | 4 |  |  | 9 |  |  | 6 |
Assumed losses and LAE | — |  |  | — |  |  | — |  |  | — |
The Company entered into various collateralized reinsurance agreements with Kilimanjaro Re Limited (“Kilimanjaro”), a Bermuda-based special purpose reinsurer, to provide the Company with catastrophe reinsurance coverage. These agreements are multi-year reinsurance contracts which cover named storm and earthquake events. The table below summarizes the various agreements.
(Dollars in millions) |  |  |  |  |  |  |  |  |  |
Class |  | Description |  | Effective Date |  | Expiration Date |  | Limit |  | Coverage Basis
Series 2021-1 Class A-2 |  | US, Canada, Puerto Rico – Named Storm and Earthquake Events |  | 4/8/2021 |  | 4/20/2026 |  | 150 |  |  | Occurrence
Series 2021-1 Class B-2 |  | US, Canada, Puerto Rico – Named Storm and Earthquake Events |  | 4/8/2021 |  | 4/20/2026 |  | 90 |  |  | Aggregate
Series 2021-1 Class C-2 |  | US, Canada, Puerto Rico – Named Storm and Earthquake Events |  | 4/8/2021 |  | 4/20/2026 |  | 90 |  |  | Aggregate
Series 2024-1 Class A |  | US, Canada, Puerto Rico – Named Storm and Earthquake Events |  | 6/27/2024 |  | 6/30/2028 |  | 75 |  |  | Occurrence
Series 2024-1 Class B |  | US, Canada, Puerto Rico – Named Storm and Earthquake Events |  | 6/27/2024 |  | 6/30/2028 |  | 125 |  |  | Occurrence
Series 2025-1 Class A-1 |  | US, Canada, Puerto Rico – Named Storm and Earthquake Events |  | 6/26/2025 |  | 7/9/2029 |  | 105 |  |  | Aggregate
Series 2025-2 Class A-2 |  | US, Canada, Puerto Rico – Named Storm and Earthquake Events |  | 6/26/2025 |  | 7/8/2030 |  | 105 |  |  | Aggregate
Series 2025-1 Class B-1 |  | US, Canada, Puerto Rico – Named Storm and Earthquake Events |  | 6/26/2025 |  | 7/9/2029 |  | 120 |  |  | Aggregate
Series 2025-2 Class B-2 |  | US, Canada, Puerto Rico – Named Storm and Earthquake Events |  | 6/26/2025 |  | 7/8/2030 |  | 120 |  |  | Aggregate
Series 2025-1 Class C-1 |  | US, Canada, Puerto Rico – Named Storm and Earthquake Events |  | 6/26/2025 |  | 7/9/2029 |  | 170 |  |  | Occurrence
Series 2025-2 Class C-2 |  | US, Canada, Puerto Rico – Named Storm and Earthquake Events |  | 6/26/2025 |  | 7/8/2030 |  | 170 |  |  | Occurrence
Series 2025-1 Class D-1 |  | US, Canada, Puerto Rico – Named Storm and Earthquake Events |  | 6/26/2025 |  | 7/9/2029 |  | 105 |  |  | Occurrence
Series 2025-2 Class D-2 |  | US, Canada, Puerto Rico – Named Storm and Earthquake Events |  | 6/26/2025 |  | 7/8/2030 |  | 105 |  |  | Occurrence
|  | Total available limit as of September 30, 2025 |  |  |  |  |  | $ | 1,530 |  |  |
Recoveries under these collateralized reinsurance agreements with Kilimanjaro are primarily dependent on estimated industry-level insured losses from covered events, as well as the geographic location of the events. The estimated industry-level of insured losses is obtained from published estimates by an independent recognized authority on insured property losses. Kilimanjaro has financed the various property catastrophe reinsurance coverages by issuing catastrophe bonds to unrelated, external investors. The proceeds from the issuance of the catastrophe bonds are held in reinsurance trusts throughout the duration of the applicable reinsurance agreements and invested solely in U.S. government money market funds with a rating of at least “AAAm” by Standard & Poor’s. The catastrophe bonds’ issue dates, maturity dates and amounts correspond to the reinsurance agreements listed above.

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- Definition Collateralized Reinsurance And Trust Agreements[Abstract] + References No definition available. + Details
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- Definition The entire disclosure for assets that are restricted in their use, generally by contractual agreements or regulatory requirements. This would include, but not limited to, a description of the restricted assets and the terms of the restriction. + References No definition available. + Details
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