Key facts
- This page summarizes Emily M. Leproust's Form 4 filing for Twist Bioscience Corp (TWST).
- 1 reported transaction and 5 derivative rows are listed below.
- Accepted by SEC: 05 Aug 2026, 16:05.
Emily M. Leproust - 03 Aug 2026 Form 4 Insider Report for Twist Bioscience Corp (TWST)
- Reporting relationship
- Chief Executive Officer, Director
- Issuer ticker
- TWST
- Reported as of
- 03 Aug 2026
- Net transaction value
- -$435,223
- SEC form
- 4
- Accepted by SEC
- 05 Aug 2026, 16:05:17 UTC
- Prior SEC filing
- 26 Jun 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Kendra Fox, as Attorney-in-Fact for Emily M. Leproust
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Emily M. Leproust filed Form 4 for Twist Bioscience Corp (TWST) on 05 Aug 2026.
Change
- Previous filing in this sequence was filed on 26 Jun 2026.
- Current net transaction value: -$435,223.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001753655
Primary reporting owner
Leproust Emily M.
- Relationship
- Chief Executive Officer, Director
- Address
- C/O TWIST BIOSCIENCE CORPORATION, 681 GATEWAY BLVD., SOUTH SAN FRANCISCO
- Signature
- /s/ Kendra Fox, as Attorney-in-Fact for Emily M. Leproust
- Signature date
- 05 Aug 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
TWST
transaction
Common Stock
Sale
- Transaction value
- $435,223
- Shares
- -5,101
- Change %
- -0.62%
- Price
- $85.32
- Shares after
- 818,938
- Date
- 03 Aug 2026
- Ownership
- Direct
- Footnotes
- F1
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
TWST
holding
Derivative
Employee Stock Option (right to buy)
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 0
- Date
- 03 Aug 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 0
- Exercise price
- $5.95
- Footnotes
- F2
TWST
holding
Derivative
Employee Stock Option (right to buy)
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 75,439
- Date
- 03 Aug 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 0
- Exercise price
- $8.82
- Footnotes
- F3
TWST
holding
Derivative
Employee Stock Option (right to buy)
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 266,539
- Date
- 03 Aug 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 0
- Exercise price
- $26.66
- Footnotes
- F4
TWST
holding
Derivative
Employee Stock Option (right to buy)
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 131,290
- Date
- 03 Aug 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 0
- Exercise price
- $23.33
- Footnotes
- F5
TWST
holding
Derivative
Employee Stock Option (right to buy)
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 64,950
- Date
- 03 Aug 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 64,950
- Exercise price
- $67.85
- Footnotes
- F6
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 6 footnotes
Footnote F1
Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of Restricted Stock Units. These sales are mandated by the Issuer's election under its equity incentive plans to require the satisfaction of a tax withholding obligation to be funded by a "sell to cover" transaction and do not represent discretionary trades by the Reporting Person.
Footnote F2
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.
Footnote 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 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.
Footnote 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.
Footnote 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.
Footnote F6
Represents performance stock options granted to the reporting person on September 1, 2020, that vested and became exercisable on December 19, 2022 as a result of the reporting person having met the applicable performance criteria.