Emily M. Leproust - Sep 1, 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
Stock symbol: TWST
Transactions as of: Sep 1, 2021
Transactions value $: -$730,844
Form type: 4
Date filed: 9/3/2021, 04:30 PM
Previous filing: Sep 1, 2021
Next filing: Sep 13, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TWST	Common Stock	Sale	-$682K	-5.91K	-2.62%	$115.43^*	220K	Sep 1, 2021	Direct	F1, F2
transaction	TWST	Common Stock	Sale	-$48.7K	-419	-0.19%	$116.16^*	219K	Sep 1, 2021	Direct	F1, F3

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)						267K	Sep 1, 2021	Common Stock	0	$26.66	Direct	F4
holding	TWST	Employee Stock Option (right to buy)						131K	Sep 1, 2021	Common Stock	0	$23.33	Direct	F5
holding	TWST	Employee Stock Option (right to buy)						84.6K	Sep 1, 2021	Common Stock	0	$5.95	Direct	F6
holding	TWST	Employee Stock Option (right to buy)						202K	Sep 1, 2021	Common Stock	0	$8.82	Direct	F7

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

Explanation of Responses:

Id	Content
F1	The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on May 28, 2021.
F2	Represents the weighted average sales price per share. The shares sold at prices ranging from $115.00 to $115.89 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.
F3	Represents the weighted average sales price per share. The shares sold at prices ranging from $116.09 to $116.22 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.
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 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.
F6	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.
F7	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.