Company: AIZ
Filing Date: 2025-08-15
Form Type: 424B5
Source: 0001193125-25-181851
Chunk: 21

Company: ASSURANT, INC.
Filing Date: 2025-08-15
Form: 424B5
Chunk 21
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 stated interest, which will be taxable as interest to the extent not previously included in income. Amounts attributable to accrued interest are treated as interest and taxed as described under “—Payments of interest” above. A U.S. Holder’s adjusted tax basis in a Note generally will equal the cost of the Note to the U.S. Holder. Gain or loss realized on the sale, exchange or other taxable disposition of a Note generally will be capital gain or loss and will be long-term capital gain or loss if at the time of the sale, exchange or other taxable disposition the Note has been held by the U.S. Holder for more than one year. For non-corporatetaxpayers, long-term capital gains are generally eligible for reduced rates of taxation. The deductibility of capital losses is subject to limitations. Backup withholding and information reporting Information returns will be filed with the Internal Revenue Service (“IRS”) in connection with payments on the Notes and the payment of proceeds from a sale or other disposition (including a retirement) of the Notes S-16

unless the U.S. Holder is an exempt recipient. A U.S. Holder will be subject to U.S. backup withholding, currently at a rate of 24 percent, on these payments if the U.S. Holder fails to provide its taxpayer identification number to the applicable withholding agent and comply with certain certification procedures or otherwise establish an exemption from backup withholding. Backup withholding is not an additional tax. The amount of any backup withholding from a payment to a U.S. Holder will be allowed as a credit against the U.S. Holder’s U.S. federal income tax liability and may entitle the U.S. Holder to a refund, provided that the required information is timely furnished to the IRS. U.S. Holders should consult their tax advisors concerning the application of information reporting and backup withholding rules. Tax Consequences to Non-U.S.Holders of the Notes Payments on the Notes Subject to the discussions below concerning “FATCA,” backup withholding and effectively connected income:

| • |     | Payments of principal and interest on the Notes by us or any paying agent to any                                       
 Non-U.S. Holder will not be subject to U.S. federal income tax or withholding, provided that, in the case of interest: |

| • |     | the beneficial owner does not own, actually or constructively, 10 percent or more of the total combined                                                                                                                                               
 voting power of all classes of our stock entitled to vote, is not a controlled foreign corporation related, directly or indirectly, to