Emily M. Leproust - 01 Jul 2021 Form 4 Insider Report for Twist Bioscience Corp (TWST)

Role: President & CEO, Director
Signature: /s/ William Solis, as Attorney-in-Fact for Emily M. Leproust
Issuer symbol: TWST
Transactions as of: 01 Jul 2021
Net transactions value: -$82,832
Form type: 4
Filing time: 06 Jul 2021, 19:33:20 UTC
Previous filing: 16 Jun 2021
Next filing: 14 Jul 2021
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TWST	Common Stock	Tax liability	$82,832	-630	-0.24%	$131.48^*	257,356	01 Jul 2021	Direct	F1

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
holding	TWST	Employee Stock Option (right to buy)						230,794	01 Jul 2021	Common Stock	0	$8.82	Direct	F2
holding	TWST	Employee Stock Option (right to buy)						266,539	01 Jul 2021	Common Stock	0	$26.66	Direct	F3
holding	TWST	Employee Stock Option (right to buy)						131,290	01 Jul 2021	Common Stock	0	$23.33	Direct	F4
holding	TWST	Employee Stock Option (right to buy)						95,699	01 Jul 2021	Common Stock	0	$5.95	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 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 vested 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.
F3	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.
F4	25% of the shares subject to the option vested on October 24, 2020, 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.
F5	The option is immediately exercisable. 25% of the shares subject to the option vested on September 1, 2016 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.