Company: AIZ
Filing Date: 2025-08-15
Form Type: 424B5
Source: 0001193125-25-181851
Chunk: 36

Company: ASSURANT, INC.
Filing Date: 2025-08-15
Form: 424B5
Chunk 36
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 made the subject of an invitation for subscription or purchase, nor may this prospectus supplement, the accompanying prospectus or any other document or material in connection with the offer or
sale, or invitation for subscription or purchase of the Notes be circulated, whether directly or indirectly, to any person in Singapore other than (i) to an institutional investor (as defined in Section 4A of the Securities and Futures Act
2001 of Singapore, as modified or amended from time to time (the “SFA”)) pursuant to Section 274 of the SFA or (ii) to an accredited investor (as defined in Section 4A of the SFA) pursuant to and in accordance with the
conditions specified in Section 275 of the SFA.

Notice to Prospective Investors in Taiwan

The Notes have not been and will not be registered or filed with, or approved by, the Financial Supervisory Commission of Taiwan and/or other
regulatory authority of Taiwan pursuant to relevant securities laws and regulations and may not be sold, issued or offered within Taiwan through a public offering or in circumstances which could constitute an offer within the meaning of the
Securities and Exchange Act of Taiwan or relevant laws and regulations that requires a registration, filing or approval of the Financial Supervisory Commission of Taiwan and/or other regulatory authority of Taiwan. No person or entity in Taiwan has
been authorized to offer or sell the Notes in Taiwan.

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VALIDITY OF THE NOTES

The validity of the Notes will be passed upon for the Company by Davis Polk & Wardwell LLP, New York, New York, and the validity of
the Notes will be passed upon for the underwriters by Sidley Austin LLP, New York, New York.

EXPERTS

The financial statements and management’s assessment of the effectiveness of internal control over financial reporting (which is
included in Management’s Annual Report on Internal Control over Financial Reporting) incorporated in this prospectus supplement by reference to the Annual Report on Form 10-K for the year ended
December 31, 2024 have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

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PROSPECTUS

ASSURANT, INC.

Debt Securities

Common Stock

Preferred Stock

Depositary Shares

Warrants

Stock Purchase Contracts

Units

We may offer these securities or a combination of these securities from time to time on terms to be determined