Company: SLDE
Filing Date: 2025-06-18
Form Type: 424B4
Source: 0001193125-25-142810
Chunk: 221

Company: Slide Insurance Holdings, Inc.
Filing Date: 2025-06-18
Form: 424B4
Chunk 221
---
 a result of the contractual 180-day lock-upperiod described below and the provisions of Rules 144 and 701, these shares will be available for sale in the public market as follows:

| Number of Shares |     | Date                                               |
| 24,000,000       |     | On the date of this prospectus.                    |
| 93,080,871       |     | After 180 days from the date of this prospectus    
 (subject, in some cases, to volume, manner of sale 
 and other limitations).                            |

Rule 144 In general, a person who has beneficially owned restricted shares of our common stock for at least six months would be entitled to sell such securities, provided that (i) such person is not deemed to have been one of our affiliates at the time of, or at any time during the 90 days preceding, a sale and (ii) we are subject to the Exchange Act periodic reporting requirements for at least 90 days before the sale. Persons who have beneficially owned restricted shares of our common stock for at least six months but who are our affiliates at the time of, or any time during the 90 days preceding, a sale, would be subject to additional restrictions, by which such person would be entitled to sell within any three-month period only a number of securities that does not exceed the greater of either of the following:

| • |     | 1% of the number of shares of our common stock then outstanding, which will equal approximately                                      
 1,249,341 shares immediately after this offering, assuming no exercise of the underwriters’ option to purchase additional shares; or |

| • |     | the average weekly trading volume of our common stock on the Nasdaq Global Select Market during the four calendar 
 weeks preceding the filing of a notice on Form 144 with respect to the sale;                                      |

provided, in each case, that we are subject to the Exchange Act periodic reporting requirements for at least 90 days before the sale. Such sales both by affiliates and by non-affiliatesmust also comply with the manner of sale, current public information and notice provisions of Rule 144 to the extent applicable. Rule 701 In general, under Rule 701, any of our employees, directors, officers, consultants or advisors who purchases shares from us in connection with a compensatory stock or option plan or other written agreement before the effective date of this offering is entitled to resell such shares 90 days after the effective date of this offering in reliance on Rule