State Street (STT) COO Mostapha Tahiri Sells 54 Shares (Tax Withheld)

What Happened
Mostapha Tahiri, Executive Vice President and Chief Operating Officer of State Street Corporation (STT), had 54 shares withheld on August 14, 2026 to satisfy tax withholding obligations related to the vesting of previously awarded deferred stock. The withheld shares were valued at $191.74 each, for a total of $10,354. This disposition is a tax-withholding event (code F), not an open-market sale driven by the insider.

Key Details

• Transaction date: 2026-08-14; Filing date (Form 4): 2026-08-18. Filing appears timely.
• Transaction type/code: Tax withholding of shares upon vesting (F).
• Shares withheld/disposed: 54 shares at $191.74 each; total value $10,354.
• Shares owned after transaction: Not specified in the provided summary filing.
• Footnote: F1 — Shares were withheld to satisfy tax withholding obligations in connection with the vesting of previously awarded deferred stock.

Context
Tax-withholding dispositions are common when restricted or deferred stock vests; the company retains (or sells) a portion of the award to cover required taxes. These events are routine administrative actions and do not necessarily signal the insider’s view on the company’s prospects.