SEC Form 4 · accession 0001214659-26-010403
Twist Bioscience Corp · TWST
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Emily M. Leproust
Officer — Chief Executive Officer · Director
Period of report
Aug 12, 2026
Accepted (ET)
Aug 14, 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 12, 2026 | M | 19,952 | $26.66 | A | 838,890 | D | |
| Common StockF2 | Aug 12, 2026 | S | 19,952 | $125.0756 | D | 818,938 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Employee Stock Option (right to buy)F7 | $26.66 | Aug 12, 2026 | M | 19,952 | D | — | Nov 18, 2028 | Common Stock | 19,952 | 133,269 | D |
| Employee Stock Option (right to buy)F3 | $5.95 | holding | — | — | — | — | Sep 28, 2025 | Common Stock | 0 | 0 | D |
| Employee Stock Option (right to buy)F4 | $23.33 | holding | — | — | — | — | Oct 23, 2029 | Common Stock | 0 | 131,290 | D |
| Employee Stock Option (right to buy)F5 | $67.85 | holding | — | — | — | Dec 19, 2022 | Aug 31, 2030 | Common Stock | 0 | 64,950 | D |
| Employee Stock Option (right to buy)F6 | $8.82 | holding | — | — | — | — | Sep 28, 2027 | Common Stock | 0 | 75,439 | 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 27, 2025.
- F2Represents the weighted average sales price per share. The shares sold at prices ranging from $125.00 to $125.25 per share. Full information regarding the number of shares sold at each price shall be provided upon request to the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer.
- F3The option is immediately exercisable. 25% of the shares subject to the option vested on September 1, 2016 and 1/48th of the shares subject to the option vest on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.
- F425% of the shares subject to the option vested on October 24, 2020, and 1/48th of the shares subject to the option vest on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.
- F5Represents performance stock options granted to the reporting person on September 1, 2020, that vested and became exercisable on December 19, 2022 as a result of the reporting person having met the applicable performance criteria.
- F6The option is immediately exercisable. 10% of the shares subject to the option vested on September 28, 2017, 15% of the shares subject to the option vested on September 28, 2018, and 1/48th of the shares subject to the option vest on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.
- F720% of the shares subject to the option vested and became exercisable on October 31, 2019 and 1/60th of the shares subject to the option vest and become exercisable on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.