Company: WBS-PG
Filing Date: 2025-09-05
Form Type: 424B5
Source: 0001193125-25-197211
Chunk: 67

Company: WEBSTER FINANCIAL CORP
Filing Date: 2025-09-05
Form: 424B5
Chunk 67
---
 (EU) 2017/1129. S-42

United Kingdom No offer of the Notes to the public has been or will be made in the United Kingdom, except that offers of the Notes to the public may be made in the United Kingdom at any time under the following exemptions:

| • |     | to any legal entity which is a “qualified investor” as defined in the UK Prospectus Regulation; |

| • |     | to fewer than 150 natural or legal persons (other than qualified investors, as defined in the UK Prospectus 
 Regulation), subject to obtaining the prior consent of the underwriters for any such offer; or              |

| • |     | in any other circumstances falling within section 86 of the Financial Services and Markets Act 2000 (the 
 “FSMA”);                                                                                                 |

providedthat no such offer of Notes shall require us or the underwriters to publish a prospectus pursuant to section 85 of the FSMA or supplement a prospectus pursuant to Article 23 of the UK Prospectus Regulation. In addition, this document is only being distributed to, and is only directed at, persons in the United Kingdom that are (i) investment professionals falling within Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended, referred to herein as the Order, and/or (ii) high net worth entities falling within Article 49(2)(a) to (d) of the Order and other persons to whom it may lawfully be communicated. Each such person is referred to herein as a Relevant Person. In the United Kingdom, any investment or investment activity to which this prospectus supplement relates is available only to Relevant Persons and will only be engaged with Relevant Persons. This prospectus supplement and its contents are confidential and should not be distributed, published or reproduced (in whole or in part) or disclosed by recipients to any other persons in the United Kingdom. Any person in the United Kingdom that is not a Relevant Person should not act or rely on this document or any of its contents. For the purposes of the above provisions, the expression “an offer of Notes to the public” in relation to any Notes in any Member State means the communication in any form and by any means of sufficient information on the terms of the offer and any Notes to be offered so as to enable an investor to decide to purchase or subscribe for any Notes, and the expression “UK Prospectus Regulation” means Regulation (EU) 2017/