Dennis Cho - 28 Oct 2025 Form 4 Insider Report for Twist Bioscience Corp (TWST)

Role: Senior Vice President, Chief Legal Officer & Corporate Secretary
Signature: /s/ Kendra Fox, as Attorney-in-Fact for Dennis Cho
Issuer symbol: TWST
Transactions as of: 28 Oct 2025
Net transactions value: $0
Form type: 4
Filing time: 30 Oct 2025, 16:05:14 UTC
Previous filing: 08 Oct 2025
Next filing: 03 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Cho Dennis	Senior Vice President, Chief Legal Officer & Corporate Secretary	C/O TWIST BIOSCIENCE CORPORATION, 681 GATEWAY BLVD, SOUTH SAN FRANCISCO	/s/ Kendra Fox, as Attorney-in-Fact for Dennis Cho	30 Oct 2025	0001883451

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TWST	Common Stock	Award	$0	+29,518	+30%	$0.000000	128,228	28 Oct 2025	Direct	F1

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

Explanation of Responses:

Id	Content
F1	Represents Performance Stock Units for which target criteria was determined to have been met on October 28, 2025. 60% of the PSUs remain subject to time-based vesting and will vest on October 1, 2026, subject to continued service or acceleration of vesting as provided in the award agreement.

Remarks:

Senior Vice President, Chief Legal Officer & Corporate Secretary