Company: WBS-PG
Filing Date: 2025-09-05
Form Type: 424B5
Source: 0001193125-25-197211
Chunk: 9

Company: WEBSTER FINANCIAL CORP
Filing Date: 2025-09-05
Form: 424B5
Chunk 9
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 of payment to promissory notes, bonds, debentures and other evidences of indebtedness of types that include the Notes; |

| • |     | will be structurally subordinated to our existing and future indebtedness, deposits and other liabilities of the                                                                                                                     
 Company’s current and future subsidiaries, including the Bank’s liabilities to depositors in connection with the deposits, as well as liabilities to general creditors and liabilities arising in the ordinary course of business or 
 otherwise; and                                                                                                                                                                                                                       |

| • |     | will be effectively subordinated to our existing and future secured indebtedness to the extent of the value of 
 the assets securing such indebtedness.                                                                         |

| As of June 30, 2025, on a consolidated basis, our liabilities totaled approximately $72.6 billion, which includes approximately $0.6 billion of subordinated notes of the Company that would rank equal with 
 the Notes and $72.1 billion of liabilities of our subsidiaries that would be structurally senior to the Notes.                                                                                               |

| The Indenture does not limit the amount of additional indebtedness we or our subsidiaries may incur. |

S-3

| Form and Denomination | The Notes will be offered in book-entry form only through the facilities of The Depository Trust Company (with its successors, “DTC”) in minimum denominations of $1,000 and integral multiples of $1,000 in excess thereof. |

| Special Redemption | We may also redeem the Notes at any time prior to their maturity, in whole, but not in part, subject to obtaining the prior approval of the Federal Reserve to the extent such approval is then required under the rules of the Federal Reserve, if:   
 (i) we receive an opinion of independent tax counsel to the effect that as a result of an amendment or change (including any announced prospective amendment or change) in law, or an administrative or judicial action that is announced or taken,    
 or an amendment to or change in any official position with respect to, or interpretation of, an administrative or judicial action or a law or regulation that differs from the previously generally accepted position or interpretation, in each case, 
 which amendment or change becomes effective or which pronouncement or decision is announced or taken on or after the original issue date of the Notes, there is more than an insubstantial risk that interest payable by us on the Notes is not, or    
 within 90 days of the date of such opinion will not be, deductible by us, in whole or in part,