Patrick John Finn - 18 Aug 2026 Form 4 Insider Report for Twist Bioscience Corp (TWST)

Reporting relationship: President and COO
Issuer ticker: TWST
Reported as of: 18 Aug 2026
Net transaction value: -$9,217,607
SEC form: 4
Accepted by SEC: 20 Aug 2026, 16:05:11 UTC
Prior SEC filing: 05 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Kendra Fox, as Attorney-in-Fact for Patrick John Finn

Key filing fact

Patrick John Finn filed Form 4 for Twist Bioscience Corp (TWST) on 20 Aug 2026.

Key facts

This page summarizes Patrick John Finn's Form 4 filing for Twist Bioscience Corp (TWST).
9 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 20 Aug 2026, 16:05.

Change

Previous filing in this sequence was filed on 05 Aug 2026.
Current net transaction value: -$9,217,607.

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

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001755970 Primary reporting owner

Finn Patrick John

Relationship: President and COO
Address: C/O TWIST BIOSCIENCE CORPORATION, 681 GATEWAY BLVD., SOUTH SAN FRANCISCO
Signature: /s/ Kendra Fox, as Attorney-in-Fact for Patrick John Finn
Signature date: 20 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

TWST transaction

Common Stock

Options Exercise

Transaction value
Shares: +23,355
Change %: +8.7%
Price: $67.85^*
Shares after: 293,033
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1

TWST transaction

Common Stock

Sale

Transaction value: $3,865,695
Shares: -33,354
Change %: -11%
Price: $115.90
Shares after: 259,679
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F2

TWST transaction

Common Stock

Sale

Transaction value: $1,217,266
Shares: -10,420
Change %: -4%
Price: $116.82
Shares after: 249,259
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F3

TWST transaction

Common Stock

Sale

Transaction value: $1,043,737
Shares: -8,868
Change %: -3.6%
Price: $117.70
Shares after: 240,391
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F4

TWST transaction

Common Stock

Sale

Transaction value: $535,680
Shares: -4,500
Change %: -1.9%
Price: $119.04
Shares after: 235,891
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F5

TWST transaction

Common Stock

Sale

Transaction value: $1,548,206
Shares: -12,917
Change %: -5.5%
Price: $119.86
Shares after: 222,974
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F6

TWST transaction

Common Stock

Sale

Transaction value: $761,860
Shares: -6,296
Change %: -2.8%
Price: $121.01
Shares after: 216,678
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F7

TWST transaction

Common Stock

Sale

Transaction value: $245,162
Shares: -2,000
Change %: -0.92%
Price: $122.58
Shares after: 214,678
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F8

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

TWST transaction Derivative

Stock Option (right to buy)

Options Exercise

Transaction value
Shares: -23,355
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 18 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 23,355
Exercise price: $67.85
Footnotes: F1, F9

^* 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 9 footnotes

Footnote F1

The transactions reported on this Form 4 were affected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person on May 18, 2026.

Footnote F2

Represents the weighted average sales price per share. The shares sold at prices ranging from $115.35 to $116.33 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 F3

Represents the weighted average sales price per share. The shares sold at prices ranging from $116.37 to $117.36 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 $117.37to $118.19 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 $118.505 to $119.45 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 $119.515 to $120.2 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 $120.585 to $121.53 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 $122.00 to $122.815 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

The option was 100% exercisable on December 19, 2022.