Robert F. Werner - 03 Feb 2026 Form 4 Insider Report for Twist Bioscience Corp (TWST)

Role: Chief Accounting Officer
Signature: /s/ Kendra Fox, as Attorney-in-Fact for Robert F. Werner
Issuer symbol: TWST
Transactions as of: 03 Feb 2026
Net transactions value: -$327,687
Form type: 4
Filing time: 05 Feb 2026, 16:05:11 UTC
Previous filing: 10 Dec 2025
Next filing: 11 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
WERNER ROBERT F.	Chief Accounting Officer	C/O TWIST BIOSCIENCE CORPORATION, 681 GATEWAY BLVD, SOUTH SAN FRANCISCO	/s/ Kendra Fox, as Attorney-in-Fact for Robert F. Werner	05 Feb 2026	0001590947

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TWST	Common Stock	Sale	$8,151	-175	-0.27%	$46.58	65,738	03 Feb 2026	Direct	F1
transaction	TWST	Common Stock	Sale	$319,536	-7,000	-11%	$45.65	58,738	04 Feb 2026	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of Restricted Stock Units. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.
F2	Represents the weighted average sales price per share. The shares sold at prices ranging from $45.61 to $45.78 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.

Content

Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of Restricted Stock Units. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.

Represents the weighted average sales price per share. The shares sold at prices ranging from $45.61 to $45.78 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.