Webster Financial (NYSE: WBS) CAO has 1,158 shares withheld

Rhea-AI Filing Summary

WEBSTER FINANCIAL CORP officer Kristen Antonopoulos, Chief Accounting Officer, reported a disposition related to equity compensation. On August 13, 2026, 1,158 shares of common stock were withheld at $79.07 per share to cover tax liabilities upon the vesting of time-based restricted shares that were accelerated under a Transaction Agreement among Webster Financial Corporation, Banco Santander, S.A. and Webster Virginia Corporation. After this tax-withholding event, Antonopoulos directly held 6,230 shares of Webster common stock.

Insider Trade Summary

Net Seller: 1,158 shares

Net Sell 1 txn

Insider Antonopoulos Kristen

Role Chief Accounting Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	1,158	$79.07	$92K

Holdings After Transaction: Common Stock — 6,230 shares (Direct)

Footnotes (1)

1. F1. Represents the tax withholding upon the vesting of certain time-based restricted shares that were accelerated pursuant to the Transaction Agreement, dated as of February 3, 2026, by and among Webster Financial Corporation, Banco Santander, S.A. and Webster Virginia Corporation.

Key Figures

Shares withheld for taxes: 1,158 shares Per-share value for withholding: $79.07 per share Shares held after transaction: 6,230 shares +1 more

4 metrics

Shares withheld for taxes 1,158 shares Common stock withheld on August 13, 2026 to satisfy tax liability

Per-share value for withholding $79.07 per share Value applied to the 1,158 withheld shares

Shares held after transaction 6,230 shares Directly owned by Kristen Antonopoulos following the withholding transaction

ExercisePriceOrTaxLiabilityShares 1,158 shares Total shares involved in code F tax-liability withholding

Key Terms

tax withholding, time-based restricted shares, Transaction Agreement

3 terms

tax withholding financial

"Represents the tax withholding upon the vesting of certain time-based restricted shares"

Tax withholding is the practice of taking a portion of a payment—such as wages, dividends, or sale proceeds—before it reaches the recipient and sending that portion to the tax authority as an advance on the recipient’s eventual tax bill. For investors it matters because withholding reduces immediate cash received and affects after‑tax returns, estimated tax payments, and whether you may owe more or receive a refund when taxes are finally calculated, like having a small automatic savings set aside for your tax bill.

time-based restricted shares financial

"upon the vesting of certain time-based restricted shares that were accelerated"

Time-based restricted shares are company stock granted to employees or insiders that cannot be sold or fully owned until they unlock after a set period of time. Think of them like a savings account that gradually becomes accessible: they help keep key people tied to the company and can change the total number of tradable shares when they become available, which matters for investor returns and expectations about future selling pressure.

Transaction Agreement regulatory

"accelerated pursuant to the Transaction Agreement, dated as of February 3, 2026"

A transaction agreement is a legal contract that lays out the terms and steps for a specific business deal—such as a merger, acquisition, asset sale, financing, or securities purchase. It defines what each party must do, what is being exchanged, conditions that must be met, and how disputes are handled. For investors it matters because this document determines the rights, timing, risks, and potential payments they can expect from the deal, much like a recipe and schedule that guides a complex group project.

FAQ

What transaction did Webster Financial Corp (WBS) report for Kristen Antonopoulos on this Form 4?

Webster Financial Corp reported that 1,158 common shares of WBS were withheld from Chief Accounting Officer Kristen Antonopoulos on August 13, 2026 to satisfy tax liabilities arising from the vesting of certain time-based restricted shares accelerated under a Transaction Agreement.

How many Webster Financial Corp (WBS) shares does Kristen Antonopoulos hold after the reported Form 4 transaction?

After the tax-withholding transaction, Kristen Antonopoulos directly holds 6,230 shares of Webster Financial Corp common stock. This post-transaction holding reflects the remaining equity position following the withholding of 1,158 shares to cover tax obligations tied to accelerated restricted share vesting.

What was the price used for the tax-withholding shares in the WBS Form 4 filing?

The Form 4 reports that the 1,158 withheld shares were valued at $79.07 per share. This per-share value was applied in connection with using the shares to satisfy the reporting officer’s tax liability related to the vesting of time-based restricted stock.

What is the nature of the Form 4 code F transaction reported by Webster Financial Corp (WBS)?

The Form 4 uses code F, indicating shares were withheld to pay tax liability. Specifically, the filing explains the transaction represents tax withholding upon vesting of time-based restricted shares that were accelerated under a Transaction Agreement involving Webster Financial Corporation and related parties.

How is the Transaction Agreement referenced in the Webster Financial Corp (WBS) Form 4 related to the reported shares?

The filing states that the withheld shares relate to restricted stock vesting that was accelerated pursuant to a Transaction Agreement dated February 3, 2026 among Webster Financial Corporation, Banco Santander, S.A. and Webster Virginia Corporation, which triggered the associated tax-withholding event.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/17/2026 - 08:11 AM Accepted by SEC EDGAR 08/17/2026 - 08:10 AM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Antonopoulos Kristen

(Last) (First) (Middle)

C/O WEBSTER FINANCIAL CORPORATION

200 ELM STREET

(Street)

STAMFORD CONNECTICUT 06902

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
WEBSTER FINANCIAL CORP [ WBS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Accounting Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/13/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/13/2026		F		1,158(1)	D	$79.07	6,230	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents the tax withholding upon the vesting of certain time-based restricted shares that were accelerated pursuant to the Transaction Agreement, dated as of February 3, 2026, by and among Webster Financial Corporation, Banco Santander, S.A. and Webster Virginia Corporation.

Remarks:

	/s/ Bradley Larkin, attorney-in-fact	08/17/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)