Dubois-Stringfellow Nathalie 4
4 · SANGAMO THERAPEUTICS, INC · Filed Feb 26, 2026
Research Summary
AI-generated summary of this filing
Sangamo (SGMO) SVP Nathalie Dubois-Stringfellow Sells Shares
What Happened
Nathalie Dubois-Stringfellow, SVP and Chief Development Officer of Sangamo Therapeutics (SGMO), had portions of vested restricted stock units (RSUs surrendered) to cover mandatory tax withholding. On Feb 24, 2026 she surrendered 2,063 shares (withholding price ~$0.4725) for ~$975, and on Feb 25, 2026 she surrendered 12,354 shares (withholding price $0.47) for ~$5,806 — a total of 14,417 shares and roughly $6,781. These are tax-withholding dispositions (transaction code F), not open-market discretionary sales.
Key Details
- Transaction dates and prices:
- 2026-02-24: 2,063 shares withheld at $0.4725/share (~$975) (F)
- 2026-02-25: 12,354 shares withheld at $0.47/share (~$5,806) (F)
- Total surrendered: 14,417 shares for approximately $6,781.
- Shares owned after transaction: Not specified in this Form 4.
- Filing: Form 4 filed 2026-02-26 (two days after the Feb 24 transaction), which is within the standard 2-business-day Form 4 deadline.
- Footnotes / notable items:
- These dispositions were mandatory tax withholdings on RSU vesting and are reported as dispositions for SEC purposes, not open-market trades.
- The filing indicates the vested RSUs included shares from a Feb 24, 2023 RSU vesting installment and from a Feb 25, 2025 RSU grant (a one-quarter installment vesting on Feb 25, 2026, with remaining shares vesting in successive quarterly installments). Vesting is subject to continued service and potential acceleration per the issuer’s equity plan.
Context
This was a routine tax-withholding action tied to RSU vesting (transaction code F). Such withholdings are administrative dispositions and do not necessarily indicate the insider’s view on the company’s stock; purchases would generally be viewed as stronger signals of insider confidence.
Insider Transaction Report
- Tax Payment
Common Stock
[F1][F2]2026-02-24$0.47/sh−2,063$975→ 691,065 total - Tax Payment
Common Stock
[F3][F4]2026-02-25$0.47/sh−12,354$5,806→ 678,711 total
Footnotes (4)
- [F1]Represents shares underlying the portion of a restricted stock unit ("RSU") grant that vested on February 24, 2026, which were surrendered by the Reporting Person solely for mandatory tax withholding purposes using the Issuer's closing stock price on February 24, 2026 of $0.4725/share, pursuant to the terms of the Issuer's Amended and Restated 2018 Equity Incentive Plan, as amended (the "2018 EIP"). This required tax withholding transaction is deemed to constitute a disposition of these shares to the Issuer for reporting purposes and does not represent a discretionary trade by the Reporting Person in the open market or otherwise.
- [F2]Includes: (a) 2,947 shares from the February 24, 2026 vesting installment of the Reporting Person's February 24, 2023 RSU grant and (b) 120,000 shares subject to Reporting Person's February 25, 2025 RSU grant that will vest as to one-fourth (1/4) of the shares subject to the grant on February 25, 2026, and the remainder of the shares will vest in 8 successive equal quarterly installments thereafter. The vesting of all such RSU grants is subject to the Reporting Person's Continuous Service (as defined in the 2018 EIP) through each such date and subject to acceleration as provided in the 2018 EIP.
- [F3]Represents shares underlying the portion of an RSU grant that vested on February 25, 2026, which were surrendered by the Reporting Person solely for mandatory tax withholding purposes using the Issuer's closing stock price on February 25, 2026 of $0.47/share, pursuant to the terms of the 2018 EIP. This required tax withholding transaction is deemed to constitute a disposition of these shares to the Issuer for reporting purposes and does not represent a discretionary trade by the Reporting Person in the open market or otherwise.
- [F4]Includes: 17,646 shares from the February 25, 2026 vesting installment of the Reporting Person's February 25, 2025 RSU grant and the remaining 90,000 shares will vest in 8 successive equal quarterly installments thereafter. The vesting of all such RSU grants is subject to the Reporting Person's Continuous Service (as defined in the 2018 EIP) through each such date and subject to acceleration as provided in the 2018 EIP.