| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| CHESS ROBERT | Director | C/O TWIST BIOSCIENCE CORPORATION, 681 GATEWAY BLVD., SOUTH SAN FRANCISCO | /s/ Kendra Fox, as Attorney-in-Fact for Robert Chess | 09 Feb 2026 | 0001227886 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | TWST | Common Stock | Award | $0 | +5,095 | +28% | $0.000000 | 23,268 | 05 Feb 2026 | Direct | F1 |
| holding | TWST | Common Stock | 42,528 | 05 Feb 2026 | By the Chess 1997 Trust | F2 |
| Id | Content |
|---|---|
| F1 | 100% of the Shares subject to the Annual Equity Award will vest upon the earlier of (i) the one-year anniversary of the date of grant and (ii) the date of the first annual meeting of stockholders following the date of grant, provided that the Non-Employee Director is a Service Provider on each vesting date. |
| F2 | The Reporting Person and his spouse are the sole trustees and the sole beneficiaries of the Chess 1997 Trust. |