WERNER ROBERT F. 4

What Happened
Robert F. Werner, Chief Accounting Officer of Twist Bioscience (TWST), sold 688 shares on May 21, 2026 at $53.26 per share, producing gross proceeds of $36,641. The filing characterizes the transaction as an open-market or private sale and is tied to tax withholding for vested restricted stock units rather than a discretionary sale.

Key Details

• Transaction date: 2026-05-21; reported filing date: 2026-05-26 (filed late relative to the 2-business-day Form 4 deadline).
• Sale: 688 shares at $53.26 per share; total value $36,641.
• Shares owned after transaction: not disclosed in the provided filing.
• Footnote: Sale was to satisfy tax withholding on RSU vesting ("sell to cover") — a mandatory company election, not necessarily an intentional market-timing sale.
• Transaction code: S (sale); footnote indicates tax-withholding/sell-to-cover (F1).

Context
Sell-to-cover transactions are common when restricted stock units vest and the issuer withholds shares to cover taxes; these are administrative and don't necessarily signal the insider's view of the company. The late filing means the disclosure came after the typical 2-business-day window for Form 4s, which can matter for transparency but does not change the nature of the transaction.