SEC Form 4 · accession 0001214659-26-009894
Twist Bioscience Corp · TWST
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Robert Chess
Director
Period of report
Aug 7, 2026
Accepted (ET)
Aug 11, 2026 · 4:05 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001581280
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock | Aug 7, 2026 | M | 18,417 | $11.89 | A | 39,501 | D | |
| Common Stock | Aug 7, 2026 | S | 18,417 | $110.89 | D | 21,084 | D | |
| Common StockF2 | holding | — | — | — | 42,528 | I | By the Chess 1997 Trust |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (right to buy)F3 | $11.89 | Aug 7, 2026 | M | 18,417 | D | — | Sep 13, 2028 | Common Stock | 18,417 | 0 | D |
Explanation of responses
- F1The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on May 8, 2026.
- F2The Reporting Person and his spouse are the sole trustees and the sole beneficiaries of the Chess 1997 Trust.
- F3The option is immediately exercisable. 10% of the shares subject to the option vested on September 13, 2018, 15% of the shares subject to the option vested on March 24, 2019, and 1/48th of the shares subject to the option vested on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.