Company: WBS-PG
Filing Date: 2025-09-05
Form Type: 424B5
Source: 0001193125-25-197211
Chunk: 116

Company: WEBSTER FINANCIAL CORP
Filing Date: 2025-09-05
Form: 424B5
Chunk 116
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 agent will issue a new warrant certificate for the remaining warrants. Prior to the exercise of any warrants to purchase debt securities or other securities, including shares of preferred stock or common stock, holders of the warrants will not have any of the rights of holders of the debt securities or other securities, including shares of preferred stock or common stock purchasable upon exercise, including:

| • |     | in the case of warrants for the purchase of debt securities, the right to receive payments of principal of, or                    
 any premium or interest on, the debt securities purchasable upon exercise or to enforce covenants in the applicable indenture; or |

| • |     | in the case of warrants for the purchase of shares of preferred stock or shares of common stock, the right to            
 vote or to receive any payments of dividends on the shares of preferred stock or common stock purchasable upon exercise. |

The descriptions of the warrant agreements in this prospectus and in any prospectus supplement are summaries of certain material provisions of the applicable warrant agreements. These descriptions do not restate those agreements in their entirety and 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 the applicable warrant agreement and warrant certificate relating to the warrants because they, and not the summaries, define your rights as holders of the warrants or any warrant units. For more information, please review the forms of these documents, which will be filed with the SEC promptly after the offering of warrants or warrant units and will be available as described under the heading “Where You Can Find More Information” above. 35

DESCRIPTION OF PURCHASE CONTRACTS

As may be specified in a prospectus supplement, we may issue purchase contracts obligating holders to purchase from Webster, and obligating Webster to sell to
the holders, a number of debt securities, shares of our common stock, or preferred stock or depositary shares or warrants, at a future date or dates. The price per purchase contract security may be fixed at the time the purchase contracts are issued
or may be determined by reference to a specific formula set forth in the purchase contracts. Under the purchase contracts, we may be required to make periodic payments to the holders of the units or vice versa. These payments may be unsecured or
prefunded on some basis to be specified in the applicable prospectus supplement.

The purchase contracts may require holders to secure their obligations
under the contracts in a specified manner and, in specified circumstances, we may deliver newly issued prepaid purchase