Patrick John Finn - Jul 1, 2021 Form 4 Insider Report for Twist Bioscience Corp (TWST)

Role: Chief Commercial Officer
Signature: /s/ William Solis, as Attorney-in-Fact for Patrick John Finn
Stock symbol: TWST
Transactions as of: Jul 1, 2021
Transactions value $: -$326,749
Form type: 4
Date filed: 7/6/2021, 07:27 PM
Previous filing: Jun 4, 2021
Next filing: Jul 27, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TWST	Common Stock	Tax liability	-$33.8K	-257	-0.62%	$131.48^*	41.2K	Jul 1, 2021	Direct	F1
transaction	TWST	Common Stock	Options Exercise	$3.16K	+358	+0.87%	$8.82	41.5K	Jul 2, 2021	Direct
transaction	TWST	Common Stock	Options Exercise	$40.4K	+1.52K	+3.65%	$26.66	43K	Jul 2, 2021	Direct
transaction	TWST	Common Stock	Options Exercise	$19.3K	+827	+1.92%	$23.33	43.9K	Jul 2, 2021	Direct
transaction	TWST	Common Stock	Sale	-$356K	-2.7K	-6.16%	$131.70^*	41.2K	Jul 2, 2021	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	TWST	Employee Stock Option (right to buy)	Options Exercise	$0	-358	-2.14%	$0.00	16.3K	Jul 2, 2021	Common Stock	358	$8.82	Direct	F3
transaction	TWST	Employee Stock Option (right to buy)	Options Exercise	$0	-1.52K	-3.45%	$0.00	42.5K	Jul 2, 2021	Common Stock	1.52K	$26.66	Direct	F4
transaction	TWST	Employee Stock Option (right to buy)	Options Exercise	$0	-827	-3.45%	$0.00	23.2K	Jul 2, 2021	Common Stock	827	$23.33	Direct	F5

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

Explanation of Responses:

Id	Content
F1	Represents shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligation in connection with the vesting of certain Restricted Stock Units ("RSUs") previously granted to the Reporting Person. Such withholding is exempt from Section 16(b) pursuant to Rule 16b-3(e).
F2	The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on September 3, 2020.
F3	The option is immediately exercisable. 10% of the shares subject to the option vested on September 28, 2017, 15% of the shares subject to the option vest on September 28, 2018, and 1/48th of the shares subject to the option vest on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.
F4	20% of the shares subject to the option vested and became exercisable on October 31, 2019, and 1/60th of the shares subject to the option vest and become exercisable on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.
F5	25% of the shares subject to the option vested and became exercisable on October 24, 2020, and 1/48th of the shares subject to the option vest and become exercisable on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.