Company: WBS-PG
Filing Date: 2025-09-05
Form Type: 424B5
Source: 0001193125-25-197211
Chunk: 22

Company: WEBSTER FINANCIAL CORP
Filing Date: 2025-09-05
Form: 424B5
Chunk 22
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 the payout to you on the Notes. For further information regarding
these types of determinations, see “Description of the Notes— Determinations and Decisions.”

We or an affiliate of ours will or could have authority to make determinations and elections that could affect the return on, value of and market for the Notes.

Under the terms of the Notes, we may make certain determinations, decisions and elections with respect to the Notes, including, without
limitation, any determination, decision or election required to be made by the calculation agent that the calculation agent fails to make. We will make any such determination, decision or election in our sole discretion, and any such determination,
decision or election that we make could affect the amount of interest that accrues on the Notes during Subsequent Fixed Rate Period. If the calculation agent fails, when required, to make a determination that a Rate Substitution Event has occurred,
or fails, when required, to determine the applicable U.S. Treasury Rate or to determine the Replacement Rate, then we will make those determinations in our sole discretion. Furthermore, we or an affiliate of ours may assume the duties of, and act
as, the calculation agent at any time in our sole discretion. Any exercise of discretion by us under the terms of the Notes, including, without limitation, any discretion exercised by us or by an affiliate acting as calculation agent, could present
a conflict of interest. In making the required determinations, decisions and elections, we or an affiliate of ours acting as calculation agent may have economic interests that are adverse to the interests of the holders of the Notes, and those
determinations, decisions or elections could have a material adverse effect on the yield on, value of and market for the Notes. All determinations, decisions or elections by us, including by us or an affiliate acting as calculation agent, under the
terms of the Notes will be conclusive and binding absent manifest error.

S-12

USE OF PROCEEDS

We estimate that the net proceeds from this offering will be approximately $345.7 million, after deducting the underwriting discount and
our estimated offering expenses. We intend to use the net proceeds of this offering for general corporate purposes, which may include, but are not limited to, the partial or full redemption of our subordinated indebtedness.

Our management will have broad discretion in the use of the net proceeds from the sale of the Notes. The foregoing represents our intentions
based upon our present plans and business conditions. The occurrence of unforeseen events or