Form 4 for TWST Twist Bioscience Corp
Accepted 2026-03-19 00:00:00 ET · period of report 2026-03-17 · accession 0001214659-26-003483 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-03-19 | 2026-03-17 | TWST | CHESS ROBERT | Dir | M - OptEx | $11.89 | +10.0K | 31.1K | +47% | +$118.9K |
| D | 2026-03-19 | 2026-03-17 | TWST | CHESS ROBERT | Dir | S - Sale+OE | $47.00 | -10.0K | 21.1K | -32% | -$470.0K |
| D | 2026-03-19 | 2026-03-17 | TWST | CHESS ROBERT | Dir | M - OptEx | $0.00 | -10.0K | 18.4K | -35% | $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 | 2026-03-17 | M | A | 10,000 | $11.89 | 31,084 | D | — | — | |
| 2 | Common | Common Stock | 2026-03-17 | S | D | 10,000 | $47.00 | 21,084 | D | — | — | |
| 3 | Derivative | Stock Option (right to buy) | 2026-03-17 | M | D | 10,000 | $0.00 | 18,417 | D | $11.89 · — to 2028-09-13 | 10,000 Common Stock | (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. |