Company: WBS-PG
Filing Date: 2025-09-05
Form Type: 424B5
Source: 0001193125-25-197211
Chunk: 115

Company: WEBSTER FINANCIAL CORP
Filing Date: 2025-09-05
Form: 424B5
Chunk 115
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 the warrants or 
 the exercise price of the warrants;                                                                             |

| • |     | the price or prices at which the underlying warrant securities purchasable upon exercise of the warrants may be 
 purchased;                                                                                                      |

| • |     | if applicable, the date on and after which the warrants and the underlying warrant securities purchasable upon 
 exercise of the warrants will be separately transferable;                                                      |

| • |     | if applicable, a discussion of the material United States federal income tax considerations applicable to the 
 exercise of the warrants;                                                                                     |

| • |     | the date on which the right to exercise the warrants will commence, and the date on which the right will expire; |

| • |     | the currency or currencies (including composite currencies), and/or the securities (if any), in which the                                                                                                                   
 exercise price of the warrants may be payable; and, if the exercise price is payable in whole or in part with securities, the basis for determining the amount or number of such securities to be provided as such payment; |

| • |     | the maximum or minimum number of warrants that may be exercised at any time; |

| • |     | information with respect to book-entry procedures, if any; and |

| • |     | any other terms, including terms, procedures and limitations relating to the exercise and exchange of the 
 warrants.                                                                                                 |

Exercise of Warrants Each warrant will entitle its holder to purchase, for cash and/or securities (as will be specified in the applicable prospectus supplement), the amount or number of debt securities, shares of preferred stock, or shares of common 34

stock, at the exercise price, as will in each case be set forth in, or be determinable as set forth in, the applicable prospectus supplement. Holders may exercise warrants at any time up to the close of business on the expiration date set forth in the prospectus supplement relating to the warrants offered thereby. After the close of business on the expiration date, unexercised warrants will become void. Holders of warrants may exercise their respective warrants as set forth in the prospectus supplement relating to such warrants. Upon receipt of payment and the warrant certificate properly completed and duly executed at the corporate trust office of the warrant agent or any other office indicated in the prospectus supplement, we will, as soon as practicable, forward the underlying warrant securities purchasable upon exercise of the warrants. If a holder exercises less than all of the warrants represented by the warrant certificate, the warrant