Form 4 for TWST Twist Bioscience Corp
Accepted 2026-08-11 16:05:12 ET · period of report 2026-08-07 · accession 0001214659-26-009894 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DT | 2026-08-11 16:05 | 2026-08-07 | TWST | CHESS ROBERT | Dir | M - OptEx | $11.89 | +18.4K | 39.5K | +87% | +$219.0K |
| DT | 2026-08-11 16:05 | 2026-08-07 | TWST | CHESS ROBERT | Dir | S - Sale+OE | $110.89 | -18.4K | 21.1K | -47% | -$2.04M |
| DT | 2026-08-11 16:05 | 2026-08-07 | TWST | CHESS ROBERT | Dir | M - OptEx | $0.00 | -18.4K | 0 | -100% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-08-07 | M | A | 18,417 | $11.89 | 39,501 | D | — | — | (F1) The 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. |
| 2 | Common | Common Stock | 2026-08-07 | S | D | 18,417 | $110.89 | 21,084 | D | — | — | (F1) The 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. |
| 3 | Derivative | Stock Option (right to buy) | 2026-08-07 | M | D | 18,417 | $0.00 | 0 | D | $11.89 · — to 2028-09-13 | 18,417 Common Stock | (F1) The 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. (F3) The 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. |