Company: WBS-PG
Filing Date: 2025-09-05
Form Type: 424B5
Source: 0001193125-25-197211
Chunk: 103

Company: WEBSTER FINANCIAL CORP
Filing Date: 2025-09-05
Form: 424B5
Chunk 103
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 covered by this provision include:

| • |     | any merger, consolidation or share exchange |

| • |     | any sale, lease, exchange, mortgage, pledge or other transfer of assets other than in the usual and regular 
 course of business;                                                                                         |

| • |     | any issuance or transfer of equity securities having an aggregate market value in excess of 5% of the aggregate 
 market value of our outstanding shares;                                                                         |

| • |     | the adoption of any plan or proposal of liquidation proposed by or on behalf of an interested stockholder; or |

| • |     | any reclassification of securities, recapitalization of Webster or any merger or consolidation of Webster with                                
 any of its subsidiaries or any other transaction that has the effect of increasing the proportionate ownership of the interested stockholder. |

These provisions may have the effect of deterring hostile takeovers or delaying changes in control or management of Webster. Our Certificate of Incorporation excludes our employee stock purchase plans and other employee benefit plans from the definition of interested stockholder. Since the terms of our Certificate of Incorporation and Bylaws may differ from the general information we are providing, you should only rely on the actual provisions of our Certificate of Incorporation and Bylaws. If you would like to read our Certificate of Incorporation and Bylaws, you may request a copy from us by following the directions under the heading “Where You Can Find More Information.” NYSE Listing Our common stock is listed on the New York Stock Exchange under the symbol “WBS.” Transfer Agent and Registrar The transfer agent and registrar for our common stock is Broadridge Corporate Issuer Solutions, LLC. 25

DESCRIPTION OF PREFERRED STOCK The following description is a general summary of the terms of the preferred stock that we may issue. The description below and in any prospectus supplement does not purport to be complete and is subject to and qualified in its entirety by reference to our Certificate of Incorporation, and the applicable certificate of designation to our Certificate of Incorporation, determining the terms of the related series of preferred stock and our Bylaws, as amended, each of which we will make available upon request. The descriptions herein and in the applicable prospectus supplement do not contain all of the information that you may find useful or that may be important to you. You should refer to the provisions of our Certificate of Incorporation, the applicable certificate of designation and our Bylaws because they, and not the summaries, define your rights as holders of shares of our preferred stock. General We are