Key facts
- This page summarizes Emily M. Leproust's Form 4 filing for Twist Bioscience Corp (TWST).
- 8 reported transactions and 2 derivative rows are listed below.
- Accepted by SEC: 07 Oct 2026, 16:05.
Emily M. Leproust - 05 Oct 2026 Form 4 Insider Report for Twist Bioscience Corp (TWST)
- Reporting relationship
- Chief Executive Officer, Director
- Issuer ticker
- TWST
- Reported as of
- 05 Oct 2026
- Net transaction value
- -$919,374
- SEC form
- 4
- Accepted by SEC
- 07 Oct 2026, 16:05:08 UTC
- Prior SEC filing
- 05 Oct 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 07 Oct 2026.
Change
- Previous filing in this sequence was filed on 05 Oct 2026.
- Current net transaction value: -$919,374.
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
- 07 Oct 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
TWST
transaction
Common Stock
Sale
- Transaction value
- $368,806
- Shares
- -1,840
- Change %
- -0.32%
- Price
- $200.44
- Shares after
- 565,468
- Date
- 05 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F2
TWST
transaction
Common Stock
Sale
- Transaction value
- $96,804
- Shares
- -481
- Change %
- -0.09%
- Price
- $201.26
- Shares after
- 564,987
- Date
- 05 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F3
TWST
transaction
Common Stock
Sale
- Transaction value
- $205,763
- Shares
- -1,017
- Change %
- -0.18%
- Price
- $202.32
- Shares after
- 563,970
- Date
- 05 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F4
TWST
transaction
Common Stock
Sale
- Transaction value
- $87,958
- Shares
- -432
- Change %
- -0.08%
- Price
- $203.61
- Shares after
- 563,538
- Date
- 05 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F5
TWST
transaction
Common Stock
Sale
- Transaction value
- $59,392
- Shares
- -290
- Change %
- -0.05%
- Price
- $204.80
- Shares after
- 563,248
- Date
- 05 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F6
TWST
transaction
Common Stock
Sale
- Transaction value
- $61,116
- Shares
- -297
- Change %
- -0.05%
- Price
- $205.78
- Shares after
- 562,951
- Date
- 05 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F7
TWST
transaction
Common Stock
Sale
- Transaction value
- $30,199
- Shares
- -146
- Change %
- -0.03%
- Price
- $206.84
- Shares after
- 562,805
- Date
- 05 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F8
TWST
transaction
Common Stock
Sale
- Transaction value
- $9,336
- Shares
- -45
- Change %
- -0.01%
- Price
- $207.46
- Shares after
- 562,760
- Date
- 05 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F9
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
- 131,290
- Date
- 05 Oct 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 131,290
- Exercise price
- $23.33
- Footnotes
- F10
TWST
holding
Derivative
Employee Stock Option (right to buy)
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 64,950
- Date
- 05 Oct 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 64,950
- Exercise price
- $67.85
- Footnotes
- F11
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Rule 10b5-1 trading plan
These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.
Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).
Explanation of responses 11 footnotes
Footnote 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 June 15, 2026.
Footnote F2
Represents the weighted average sales price per share. The shares sold at prices ranging from $200 to $200.99 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.
Footnote F3
Represents the weighted average sales price per share. The shares sold at prices ranging from $201 to $201.99 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.
Footnote F4
Represents the weighted average sales price per share. The shares sold at prices ranging from $202 to $202.99 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.
Footnote F5
Represents the weighted average sales price per share. The shares sold at prices ranging from $203.29 to $203.99 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.
Footnote F6
Represents the weighted average sales price per share. The shares sold at prices ranging from $204.33 to $205.32 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.
Footnote F7
Represents the weighted average sales price per share. The shares sold at prices ranging from $205.37 to $206.34 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.
Footnote F8
Represents the weighted average sales price per share. The shares sold at prices ranging from $206.38 to $207.33 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.
Footnote F9
Represents the weighted average sales price per share. The shares sold at prices ranging from $207.38 to $207.8 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.
Footnote F10
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 F11
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.