State Street (NYSE: STT) COO now holds 64,497 shares

Rhea-AI Filing Summary

STATE STREET CORP (STT) executive Mostapha Tahiri, EVP and COO, reported a Form 4 transaction involving company common stock. On 2026-08-14, 54 shares were disposed of under a code F transaction, with shares withheld to satisfy tax withholding obligations related to vesting of previously awarded deferred stock. This was not an open-market sale. Following this tax-withholding disposition, Tahiri directly holds 64,497 shares of State Street common stock.

Insider Trade Summary

Net Seller: 54 shares

Net Sell 1 txn

Insider TAHIRI MOSTAPHA

Role EVP and COO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	54	$191.74	$10K

Holdings After Transaction: Common Stock — 64,497 shares (Direct)

Footnotes (1)

1. F1. These shares were withheld to satisfy tax withholding obligations in connection with the vesting of previously awarded deferred stock.

Key Figures

Shares disposed (tax withholding): 54 shares Price per share: $191.74 Shares held after transaction: 64,497 shares +2 more

5 metrics

Shares disposed (tax withholding) 54 shares Common Stock withheld on 2026-08-14 to satisfy tax withholding obligations

Price per share $191.74 Per-share value used for the 54-share tax-withholding disposition

Shares held after transaction 64,497 shares Direct ownership of State Street common stock by Mostapha Tahiri after the transaction

Code F transactions in filing 1 Single transaction reported for payment of tax liability by withholding securities

Exercise price or tax liability shares 54 shares Total shares applied toward tax liability per transaction summary

Key Terms

deferred stock, tax withholding obligations, code F transaction

3 terms

deferred stock financial

"in connection with the vesting of previously awarded deferred stock"

tax withholding obligations financial

"shares were withheld to satisfy tax withholding obligations in connection"

code F transaction financial

"A code F transaction indicates payment of tax liability by withholding"

FAQ

What insider transaction did STT executive Mostapha Tahiri report on this Form 4?

Mostapha Tahiri reported a code F disposition of 54 shares of State Street Corp common stock. The shares were withheld to cover tax obligations arising from the vesting of previously awarded deferred stock, rather than sold in the open market.

Did the STT Form 4 filing disclose an open-market sale by Mostapha Tahiri?

No. The Form 4 shows a tax-withholding disposition, not an open-market sale. 54 shares of common stock were withheld to satisfy tax withholding obligations tied to the vesting of earlier deferred stock awards on 2026-08-14.

How many STATE STREET (STT) shares does Mostapha Tahiri hold after this transaction?

After the reported transaction, Mostapha Tahiri directly holds 64,497 shares of State Street Corp common stock. This figure reflects his post-withholding position following the disposition of 54 shares to cover tax obligations related to vesting deferred stock.

What does the code F transaction mean in the STT Form 4 for Mostapha Tahiri?

Code F on Tahiri’s Form 4 indicates payment of tax liability by delivering or withholding securities. Here, 54 shares of State Street common stock were withheld by the issuer to satisfy tax withholding obligations from vesting deferred stock.

Was the STT Form 4 transaction by Mostapha Tahiri under a Rule 10b5-1 trading plan?

The Form 4 indicates the Rule 10b5-1 checkbox is not affirmed. The document-level flag shows no 10b5-1 plan election for this filing, which reported only a tax-withholding disposition of 54 shares upon vesting of deferred stock.

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 08/18/2026 - 04:03 PM Accepted by SEC EDGAR 08/18/2026 - 04:02 PM 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^*

TAHIRI MOSTAPHA

(Last) (First) (Middle)

STATE STREET CORPORATION

ONE CONGRESS STREET

(Street)

BOSTON MASSACHUSETTS 02114

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
STATE STREET CORP [ STT ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP and COO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/14/2026

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	08/14/2026		F		54(1)	D	$191.74	64,497	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. These shares were withheld to satisfy tax withholding obligations in connection with the vesting of previously awarded deferred stock.

Remarks:

	/s/ Shannon C. Stanley, Attorney-in-fact	08/18/2026
	** 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)