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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
1753840	Mark Daniels	C/O Twist Bioscience Corporation 681 Gateway Blvd. South San Francisco CA 94080	See Remarks	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	2020-12-31	1,166	$26.66	69,953	No	4	M	Direct
Common Stock	Disposition	2020-12-31	1,166	$152.13	68,787	No	4	S	Direct
Common Stock	Disposition	2021-01-04	153	$141.29	68,634	No	4	F	Direct
Common Stock	Acquisiton	2021-01-04	669	$10.70	69,303	No	4	M	Direct
Common Stock	Disposition	2021-01-04	669	$138.61	68,634	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	F	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	2020-12-31	1,166	$0.00	1,166	$26.66
Common Stock	Employee Stock Option (right to buy)	Disposition	2021-01-04	669	$0.00	669	$10.70

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
39,676		2028-11-18	No	4	M	Direct
8,022		2028-02-01	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 September 15, 2020.
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).
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.
The option is immediately exercisable. 25% of the shares subject to the option vest on January 1, 2019, 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.