Webster CAO receives 8,152 shares in award vesting

WEBSTER FINANCIAL CORP executive Elzbieta Cieslik, EVP & CAO of the bank, reported equity compensation activity in Common Stock on August 13, 2026.

Rhea-AI Filing Summary

WEBSTER FINANCIAL CORP executive Elzbieta Cieslik, EVP & CAO of the bank, reported equity compensation activity in Common Stock on August 13, 2026. She acquired 8,152 shares upon the vesting of performance shares accelerated under a Transaction Agreement among Webster Financial Corporation, Banco Santander, S.A. and Webster Virginia Corporation. On the same date, 3,291 shares and 522 shares were disposed of at $79.07 per share for tax withholding related to the accelerated vesting of performance and time-based restricted shares.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider CIESLIK ELZBIETA

Role EVP & CAO of Bank

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1	8,152	$0.00	$0.00
Tax Withholding	Common Stock F2	3,291	$79.07	$260K
Tax Withholding	Common Stock F3	522	$79.07	$41K

Holdings After Transaction: Common Stock — 24,248 shares (Direct)

Footnotes (3)

1. F1. Represents the vesting of certain performance 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.
2. F2. Represents the tax withholding upon the vesting of certain performance 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.
3. F3. 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 acquired via vesting: 8,152 shares Shares withheld for taxes (performance shares): 3,291 shares Shares withheld for taxes (time-based restricted shares): 522 shares +2 more

5 metrics

Shares acquired via vesting 8,152 shares Vesting of certain performance shares on August 13, 2026

Shares withheld for taxes (performance shares) 3,291 shares Tax withholding upon vesting of accelerated performance shares at $79.07 per share

Shares withheld for taxes (time-based restricted shares) 522 shares Tax withholding upon vesting of accelerated time-based restricted shares at $79.07 per share

Tax withholding price $79.07 per share Price applied to shares disposed of for tax withholding on August 13, 2026

Shares used for exercise price or tax liability (Form 4 summary) 3,813 shares Total code F shares for payment of tax liability reported in the transaction summary

Key Terms

performance shares, time-based restricted shares, tax withholding, Transaction Agreement

4 terms

performance shares financial

"Represents the vesting of certain performance shares that were accelerated"

Performance shares are a type of company stock given to executives or employees that only become theirs if the company meets specific goals, like hitting certain profits or growth targets. They motivate leaders to work toward the company’s success, because their additional shares depend on achieving these results.

time-based restricted shares financial

"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.

tax withholding financial

"Represents the tax withholding upon the vesting of certain performance 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.

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

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did WEBSTER FINANCIAL CORP (WBS) report for Elzbieta Cieslik on August 13, 2026?

On August 13, 2026, Elzbieta Cieslik acquired 8,152 Webster Financial (WBS) common shares through vested performance shares. The same day, 3,291 and 522 shares were withheld at $79.07 per share to cover related tax obligations.

How many WEBSTER FINANCIAL CORP (WBS) shares were granted or vested for Elzbieta Cieslik?

Elzbieta Cieslik received 8,152 WBS common shares through the vesting of certain performance shares. These performance shares vested following acceleration under a Transaction Agreement involving Webster Financial Corporation, Banco Santander, S.A. and Webster Virginia Corporation.

What portion of Elzbieta Cieslik’s WEBSTER FINANCIAL CORP (WBS) shares was withheld for taxes?

A total of 3,291 and 522 WBS common shares were disposed of at $79.07 per share. According to the disclosure, these dispositions represented tax withholding upon the vesting of accelerated performance and time-based restricted shares.

At what price were WEBSTER FINANCIAL CORP (WBS) shares withheld for Elzbieta Cieslik’s tax obligations?

The shares withheld for Elzbieta Cieslik’s tax obligations were valued at $79.07 per WBS share. This price applied to the 3,291 and 522 common shares withheld in connection with the vesting of equity awards.

What agreement triggered the accelerated vesting of WEBSTER FINANCIAL CORP (WBS) shares for Elzbieta Cieslik?

The accelerated vesting of Elzbieta Cieslik’s performance and time-based restricted WBS shares occurred pursuant to a Transaction Agreement dated February 3, 2026 among Webster Financial Corporation, Banco Santander, S.A. and Webster Virginia Corporation.

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

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Accepted by SEC EDGAR 08/17/2026 - 08:13 AM EDT 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^*

CIESLIK ELZBIETA

(Last) (First) (Middle)

C/O WEBSTER FINANCIAL CORP

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)
	EVP & CAO of Bank

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		A		8,152(1)	A	$0	28,061	D
Common Stock	08/13/2026		F		3,291(2)	D	$79.07	24,770	D
Common Stock	08/13/2026		F		522(3)	D	$79.07	24,248	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 vesting of certain performance 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.

2. Represents the tax withholding upon the vesting of certain performance 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.

3. 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)