Twist Bioscience Corp
TWST- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0001581280
In the last 90 days, Twist Bioscience Corp insiders filed 0 open-market purchases and 30 sales; 337 institutions reported holding it in 13F filings for Q2 2026, worth $7.85B in total; ARK Invest is the only superinvestor holding it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Twist Bioscience Corp insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 0 filings
- Open-market sells
- 30 filings
- 8 insiders, $99.7M in total
- Insiders trading
- 8
- Net value
- −$99.7M
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Twist Bioscience Corp, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Leproust Emily M. | Chief Executive Officer | 613,699 | Sep 25, 2026 | 30 |
| Cho Dennis | See Remarks | 73,303 | Sep 23, 2026 | 26 |
| Green Paula | SVP of Human Resources | 116,720 | Sep 23, 2026 | 23 |
| Werner Robert F. | Chief Accounting Officer | 44,399 | Sep 10, 2026 | 19 |
| Finn Patrick John | President and COO | 210,802 | Aug 25, 2026 | 21 |
| Laponis Adam | Chief Financial Officer | 108,633 | Aug 25, 2026 | 17 |
| Blake Katryn | Director | 17,208 | Aug 14, 2026 | 2 |
| Chess Robert | Director | 21,084 | Aug 11, 2026 | 4 |
| Starovasnik Melissa A. | Director | 22,222 | Jun 1, 2026 | 5 |
| Johannessen Jan | Director | 17,754 | May 14, 2026 | 3 |
| Crandell Keith | Director | 27,571 | Feb 9, 2026 | 1 |
| Ragusa Robert P | Director | 28,983 | Feb 9, 2026 | 1 |
| Chan Nelson C | Director | 33,251 | Feb 9, 2026 | 1 |
| Banyai William | See Remark | 345,188 | May 7, 2024 | 0 |
| Mai Xiaoying | Director | 31,057 | Feb 9, 2024 | 0 |
| Thorburn James M | Chief Financial Officer | 86,334 | Jan 4, 2024 | 0 |
| Yankton Kevin Bruce | Chief Accounting Officer | 9,115 | May 19, 2023 | 0 |
| Barthelemy Nicolas | Director | 23,021 | Nov 23, 2022 | 0 |
| Weiss Patrick | Chief Operating Officer | 47,401 | Apr 5, 2022 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Oct 25, 2021 (view filing) | Oct 21 | 4 days | Chess RobertDirector | SSale | −3.70K | $120.15 | −$444.6K | −6.3%55.0K after | |
| Oct 21, 2021 (view filing) | Oct 19 | 2 days | Chess RobertDirector | SSale | −300 | $120.00 | −$36.0K | −0.5%58.7K after | |
| Oct 15, 2021 (view filing) | Oct 13 | 2 days | Weiss PatrickChief Operating Officer | SSale | −4.91K | $104.00 | −$510.2K | −9.1%49.0K after | |
| Oct 15, 2021 (view filing) | Oct 13 | 2 days | Leproust Emily M.President & CEO | SSale | −1.74K | $110.16 | −$191.7K | −1.0%172.5K after | |
| Oct 14, 2021 (view filing) | Oct 12 | 2 days | Thorburn James MChief Financial Officer | SSale | −8.00K | $101.76 | −$814.1K | −15.1%45.0K after | |
| Oct 8, 2021 (view filing) | Oct 6-7 | 2 days | Leproust Emily M.President & CEO | SSale | −8.70K | $98.04 | −$853.0K | −4.8%172.5K after | 5 lots |
| Oct 6, 2021 (view filing) | Oct 4 | 2 days | Finn Patrick JohnChief Commercial Officer | SSale | −2.70K | $104.27 | −$281.7K | −6.4%39.6K after | |
| Sep 22, 2021 (view filing) | Sep 20 | 2 days | Banyai WilliamSee Remarks | SSale | −20.0K | $113.90 | −$2.28M | −6.3%298.5K after | 6 lots |
| Sep 17, 2021 (view filing) | Sep 15 | 2 days | Weiss PatrickChief Operating Officer | SSale | −4.91K | $112.52 | −$551.9K | −9.1%49.2K after | |
| Sep 14, 2021 (view filing) | Sep 10 | 4 days | Chess RobertDirector | SSale | −4.00K | $120.23 | −$480.9K | −6.3%59.0K after | |
| Sep 13, 2021 (view filing) | Sep 9-10 | 4 days | Leproust Emily M.President & CEO | SSale | −29.6K | $118.55 | −$3.51M | −11.9%219.1K after | 5 lots |
| Sep 7, 2021 (view filing) | Sep 2 | 5 days | Finn Patrick JohnChief Commercial Officer | SSale | −2.70K | $117.99 | −$318.8K | −6.4%39.8K after | |
| Sep 3, 2021 (view filing) | Sep 1 | 2 days | Leproust Emily M.President & CEO | SSale | −6.33K | $115.48 | −$730.9K | −2.8%219.1K after | 2 lots |
| Sep 1, 2021 (view filing) | Aug 30-31 | 2 days | Leproust Emily M.President & CEO | SSale | −63.7K | $108.84 | −$6.93M | −22.0%225.5K after | 11 lots |
| Aug 26, 2021 (view filing) | Aug 24 | 2 days | Finn Patrick JohnChief Commercial Officer | SSale | −91 | $108.26 | −$9.85K | −0.2%39.8K after | |
| Aug 25, 2021 (view filing) | Aug 23 | 2 days | Banyai WilliamSee Remarks | SSale | −20.1K | $105.51 | −$2.12M | −5.9%318.5K after | 7 lots |
| Aug 20, 2021 (view filing) | Aug 18 | 2 days | Weiss PatrickChief Operating Officer | SSale | −4.91K | $97.11 | −$476.3K | −8.9%50.5K after | |
| Aug 20, 2021 (view filing) | Aug 18 | 2 days | Johannessen JanDirector | SSale | −5.00K | $97.11 | −$485.6K | −72.5%1.90K after | |
| Aug 16, 2021 (view filing) | Aug 12 | 4 days | Thorburn James MChief Financial Officer | SSale | −6.00K | $103.70 | −$622.2K | −11.5%46.2K after | |
| Aug 13, 2021 (view filing) | Aug 12 | 1 day | Crandell KeithDirector | SSale | −1.41K | $106.93 | −$151.0K | −74.4%486 after | |
| Aug 13, 2021 (view filing) | Aug 12 | 1 day | Crandell KeithDirector | SSale | −43.6K | $107.01 | −$4.66M | −36.4%76.0K after | 2 lots |
| Aug 5, 2021 (view filing) | Aug 3 | 2 days | Finn Patrick JohnChief Commercial Officer | SSale | −2.70K | $117.27 | −$316.9K | −6.2%40.9K after | |
| Aug 4, 2021 (view filing) | Aug 2 | 2 days | Leproust Emily M.President & CEO | SSale | −2.00K | $120.48 | −$241.0K | −0.8%252.4K after | 4 lots |
| Jul 28, 2021 (view filing) | Jul 26 | 2 days | Banyai WilliamSee Remarks | SSale | −19.8K | $115.25 | −$2.28M | −5.5%339.5K after | 4 lots |
| Jul 23, 2021 (view filing) | Jul 21 | 2 days | Weiss PatrickChief Operating Officer | SSale | −4.91K | $119.75 | −$587.4K | −8.8%50.7K after | |
| Jul 23, 2021 (view filing) | Jul 21 | 2 days | Thorburn James MChief Financial Officer | SSale | −5.00K | $119.75 | −$598.8K | −9.7%46.5K after | |
| Jul 14, 2021 (view filing) | Jul 12 | 2 days | Chess RobertDirector | SSale | −4.00K | $125.91 | −$503.6K | −6.0%63.0K after | 6 lots |
| Jul 14, 2021 (view filing) | Jul 12 | 2 days | Leproust Emily M.President & CEO | SSale | −2.00K | $125.85 | −$251.7K | −0.8%255.4K after | 4 lots |
| Jul 6, 2021 (view filing) | Jul 2 | 4 days | Finn Patrick JohnChief Commercial Officer | SSale | −2.70K | $131.70 | −$355.9K | −6.2%41.2K after |