Company: WBS-PG
Filing Date: 2025-09-05
Form Type: 424B5
Source: 0001193125-25-197211
Chunk: 74

Company: WEBSTER FINANCIAL CORP
Filing Date: 2025-09-05
Form: 424B5
Chunk 74
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 and other information with the SEC.
Our SEC filings are available to the public at the SEC’s web site at www.sec.gov. These documents and other information we file with the SEC may also be accessed on our website at www.websterbank.com. Information contained on our website is
not incorporated by reference into this prospectus and you should not consider information contained on our website to be part of this prospectus.

This
prospectus and any prospectus supplement are part of a registration statement filed with the SEC and do not contain all of the information in the registration statement. The full registration statement may be obtained from the SEC or us as indicated
above. Forms of any indenture or other documents establishing the terms of the offered securities are filed as exhibits to the registration statement or will be filed through an amendment to our registration statement on Form S-3 or under cover of a Current Report on Form 8-K and incorporated into this prospectus by reference.

1

The SEC allows us to “incorporate by reference” the information we file with the SEC into this prospectus, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is an important part of this prospectus. Any information incorporated by reference into this prospectus that we file with the SEC after the date of this prospectus will automatically update and supersede the information contained in this prospectus, as well as any earlier incorporated information. Webster incorporates by reference the documents and information listed below that we have previously filed with the SEC:

We also incorporate by reference any additional documents that we may file with the SEC in the future under Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as amended (the “ Exchange Act”) (in each case other than those documents or portions of those documents furnished pursuant to Item 2.02 or Item 7.01 of Form 8-K orother information “furnished” in accordance with SEC rules), from the date of the registration statement of which this prospectus is part until the termination of the offering of the securities to be issued under the registration statement. These documents may include annual, quarterly, and current reports, as well as proxy statements. Any material that we later file with the SEC will automatically update and replace the information previously filed with the SEC. These documents are available to you without charge. See “Where You Can Find More Information.” We will provide to each person, including any beneficial owner,