Company: AIZ
Filing Date: 2025-08-15
Form Type: 424B5
Source: 0001193125-25-181851
Chunk: 40

Company: ASSURANT, INC.
Filing Date: 2025-08-15
Form: 424B5
Chunk 40
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 sufficient dividends to the holding company and limitations on our 
 ability to declare and pay dividends or repurchase shares;                                                  |

| • |     | limitations in the analytical models we use to assist in our decision-making; |

| • |     | the failure to effectively maintain and modernize our information technology systems and infrastructure, or the 
 failure to integrate those of acquired businesses;                                                              |

| • |     | breaches of our information technology systems or those of third parties with whom we do business, or the failure   
 to protect the security of data in such systems, including due to cyberattacks and as a result of working remotely; |

| • |     | the costs of complying with, or the failure to comply with, extensive laws and regulations to which we are 
 subject, including those related to privacy, data security, data protection and tax;                       |

| • |     | the impact of litigation and regulatory actions; |

| • |     | reductions or deferrals in the insurance premiums we charge; |

| • |     | changes in insurance, tax and other regulations, including the Inflation Reduction Act of 2022; |

| • |     | volatility in our common stock price and trading volume; and |

| • |     | employee misconduct. |

For additional information on factors that could affect our actual results, please refer to the factors identified in the reports we file with the SEC, including the risk factors identified in our most recent Annual Report on Form 10-Kand Quarterly Reports on Form 10-Q. iv

ABOUT ASSURANT, INC.

Assurant is a leading global business services company that supports, protects and connects major consumer purchases. We support the
advancement of the connected world by partnering with the world’s leading brands to develop innovative solutions and to deliver an enhanced customer experience. As used in this prospectus, unless we state otherwise or the context indicates
otherwise, “Assurant”, the “Company”, “we”, “our” and similar terms mean Assurant, Inc., and its subsidiaries.

We operate in North America, Latin America, Europe and Asia Pacific through two operating segments: Global Lifestyle and Global Housing.
Through our Global Lifestyle segment, we provide mobile device solutions, extended service products and related services for consumer electronics and appliances, and credit and other insurance products (referred to as “Connected Living”);
and vehicle protection, leased and financed solutions and other related services (referred to as “Global Automotive”). Through our Global Housing segment, we provide lender-placed and voluntary homeowners