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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1581280	Twist Bioscience Corp	TWST	Biological Products, (No Disgnostic Substances) (2836)	462058888

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1755793	Patrick Weiss	C/O Twist Bioscience Corporation 681 Gateway Blvd. South San Francisco CA 94080	Chief Operating Officer	No	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2021-09-15	2,104	$8.82	51,336	No	4	M	Direct
Common Stock	Acquisiton	2021-09-15	1,974	$26.66	53,310	No	4	M	Direct
Common Stock	Acquisiton	2021-09-15	827	$25.02	54,137	No	4	M	Direct
Common Stock	Disposition	2021-09-15	4,905	$112.52	49,232	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (right to buy)	Disposition	2021-09-15	2,104	$0.00	2,104	$8.82
Common Stock	Employee Stock Option (right to buy)	Disposition	2021-09-15	1,974	$0.00	1,974	$26.66
Common Stock	Employee Stock Option (right to buy)	Disposition	2021-09-15	827	$0.00	827	$25.02

Remaning Holdings	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
2,105	2027-09-28	No	4	M	Direct
53,298	2028-11-18	No	4	M	Direct
22,340	2029-12-09	No	4	M	Direct

Footnotes

The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on December 15, 2020.
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.
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.
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.