Twist Bioscience Corporation (TWST)
Nasdaq: TWST · Biological Products, (No Diagnostic Substances) · South San Francisco, CA · filing with the SEC since 2013
Who runs Twist Bioscience Corporation
Officers and directors as they report to the SEC on Forms 3, 4 and 5, named as filedChief executive, as filed
Leproust Emily M.
Chief Executive Officer. First filing Oct 2018, latest Nov 5, 2026, 97 filings in all.
Officers reporting now
6
of 13 people with a filing in the last fifteen months
Directors reporting now
7
24 people on the record since 2018
Officerssales are open-market, Nov 5, 2025 to Nov 5, 2026
| Name | Title as filed | First filing | Latest filing | Sales, 12 months |
|---|---|---|---|---|
| Leproust Emily M. | Chief Executive Officer | Oct 2018 | Nov 5, 2026 | 67 · $101M |
| Finn Patrick John | President and COO | Oct 2018 | Nov 5, 2026 | 27 · $21.5M |
| Werner Robert F. | Chief Accounting Officer | May 2023 | Nov 5, 2026 | 19 · $1.5M |
| Green Paula | SVP of Human Resources | Oct 2018 | Nov 5, 2026 | 20 · $7.1M |
| Cho Dennis | See Remarks | Sep 2021 | Nov 5, 2026 | 22 · $8.7M |
| Laponis Adam | Chief Financial Officer | Jan 2024 | Oct 13, 2026 | 14 · $4.0M |
Directorssales are open-market, Nov 5, 2025 to Nov 5, 2026
| Name | Role | First filing | Latest filing | Sales, 12 months |
|---|---|---|---|---|
| Blake Katryn | director | Aug 2025 | Aug 14, 2026 | 1 · $300,000 |
| Chess Robert | director | Oct 2018 | Aug 11, 2026 | 3 · $2.6M |
| Starovasnik Melissa A. | director | Aug 2021 | Jun 1, 2026 | 4 · $300,000 |
| Johannessen Jan | director | Oct 2018 | May 14, 2026 | 3 · $1.0M |
| Chan Nelson C | director | May 2019 | Feb 9, 2026 | none |
| Crandell Keith | director | Oct 2018 | Feb 9, 2026 | none |
| Ragusa Robert P | director | Oct 2018 | Feb 9, 2026 | none |
Earlier names on the record19, newest filing first
Banyai William · officer · last filing May 2024Mai Xiaoying · director · last filing Feb 2024Thorburn James M · officer · last filing Jan 2024Yankton Kevin Bruce · officer · last filing May 2023Barthelemy Nicolas · director · last filing Nov 2022Weiss Patrick · officer · last filing Apr 2022Daniels Mark · officer · last filing Apr 2021Peck Bill · officer · last filing Nov 2019Kunz Martin · officer · last filing Nov 2019Craves Fred B · director · last filing Oct 2019Arch Venture Fund Vii, L.P. · 10% owner · last filing Nov 2018Arch Venture Fund Viii Overage, L.P. · 10% owner · last filing Nov 2018Arch Venture Partners Vii, L.P. · 10% owner · last filing Nov 2018Arch Venture Partners Vii, LLC · 10% owner · last filing Nov 2018Arch Venture Partners Viii, LLC · 10% owner · last filing Nov 2018Bybee Clinton · 10% owner · last filing Nov 2018Ever Alpha Fund L.P. · 10% owner · last filing Nov 2018Nelsen Robert · 10% owner · last filing Nov 2018Conley Paul A. · director · last filing Oct 2018
A person is listed as reporting now after a filing in the last fifteen months. The record shows when someone last filed; it does not say why they stopped. Each name links to the filings on sec.gov.