Company: SLDE
Filing Date: 2025-06-09
Form Type: S-1/A
Source: 0001193125-25-137410
Chunk: 18

Company: Slide Insurance Holdings, Inc.
Filing Date: 2025-06-09
Form: S-1/A
Chunk 18
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 policies from Citizens. Given that our business today is primarily concentrated in the Florida homeowners’ and commercial residential market, we believe these legislative developments are constructive to the efficiency and competitive dynamics of the market in which we operate. Recent Developments We have recently fully placed our 2025-2026 indemnity based, catastrophe excess-of-loss reinsurance program for our insurance subsidiary, SIC, which became effective as of June 1, 2025. Key highlights of the 2025-2026 catastrophe reinsurance program include:

| • |     | The reinsurance program provides coverage of $2.48 billion for a single catastrophic event. The total coverage                                   
 provided for all occurrences is $3.17 billion, representing an increase of $738 million or 30% over the Company’s 2024-2025 reinsurance program. |

| • |     | The total incurred net consolidated catastrophe reinsurance premiums ceded are expected to total $431 million for 
 the treaty year.                                                                                                  |

| • |     | The program includes multi-year indemnity coverage totaling $460 million sourced through 2024 and 2025 
 catastrophe bonds issued by Purple Re Ltd.                                                             |

| • |     | Our net retention is $95 million for the first event and $78 million for the second event. We have dedicated 
 third event coverage for 2025 of $82 million.                                                                |

| • |     | Florida Hurricane Catastrophe Fund participation of 90.0%, consistent with the 2024-2025 program. |

| • |     | The entire program is indemnity based, with no parametric covers. All reinsurers participating in our 2025-2026 
 catastrophe reinsurance program are rated A- or better by A.M. Best or are fully collateralized.                |

| • |     | The increased coverage and net retention associated with the catastrophe excess of loss reinsurance program 
 reflects the Company’s growth in written premium, exposure and statutory capital.                           |

8

The Company currently expects to enter into material definitive agreements with respect to its 2025-2026 reinsurance program in the third quarter of 2025. Summary Risk Factors Our business is subject to numerous risks and uncertainties, including those highlighted in the section titled “ Risk Factors” immediately following this prospectus summary. These risks include the following:

| • |     | Our limited operating history, which make our business and future prospects difficult to evaluate; |

| • |     | Whether our “Slide” brand becomes as