Company: AIZ
Filing Date: 2025-08-15
Form Type: 424B5
Source: 0001193125-25-181851
Chunk: 13

Company: ASSURANT, INC.
Filing Date: 2025-08-15
Form: 424B5
Chunk 13
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     | $           | 7,704.3 |   |

| (1) | As adjusted cash and cash equivalents does not reflect redemption premiums payable with respect to the                                                                                                                                         
 redemption of the 2026 Notes or accrued interest (only with respect to interest accruing after June 30, 2025) payable with respect the 2026 Notes. Prior to the application of the proceeds described above, we may hold the proceeds in cash, 
 invest the proceeds, repay short-term indebtedness or otherwise utilize such proceeds.                                                                                                                                                         |

| (2) | As adjusted cash and cash equivalents and the Notes offered hereby reflect net proceeds after deducting      
 underwriting discounts and commissions and estimated offering expenses payable by us. See “Use of Proceeds.” |

| (3) | As adjusted 2026 Notes reflect the application of net proceeds from this offering to redeem all of the 
 outstanding $175.0 million aggregate principal amount of 2026 Notes. See “Use of Proceeds.”            |

| (4) | As adjusted retained earnings does not reflect redemption premiums payable with respect to the redemption of 
 the 2026 Notes or any gain or loss on retirement of the 2026 Notes.                                          |

S-10

DESCRIPTION OF THE NOTES

The following description is a summary of the terms of the Notes being offered by this prospectus supplement. The description is qualified in its entirety by reference to the indenture, dated as of March 28, 2013, between us and U.S. Bank Trust Company, National Association (successor to U.S. Bank National Association), as trustee (the “base indenture”), as amended by the first supplemental indenture, dated as of February 28, 2023, between us and U.S. Bank Trust Company, National Association, as trustee (the “first supplemental indenture” and, together with the base indenture, the “senior notes indenture”). You should read the senior notes indenture, the associated documents and the following description carefully to fully understand the terms of the Notes. The senior notes indenture has been attached as an exhibit to the registration statement of which this prospectus supplement is a part. In addition, to the extent that the following description is inconsistent with that contained in the accompanying prospectus under “Description of Debt Securities We May Offer”, you should rely on this description.

General Terms of the Notes

Assurant, Inc. will issue $300.0 million aggregate principal amount of 5.550% Senior Notes due