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 |
|---|---|---|---|---|---|---|---|---|---|
| Jul 27, 2026 (view filing)4:05 PM ET | Jul 23 | 4 days | Finn Patrick JohnPresident and COO | SSale | −2.24K | $93.89 | −$210.1K | −0.8%272.6K after | |
| Aug 5, 2026 (view filing)4:05 PM ET | Aug 3 | 2 days | Cho DennisSee Remarks | SSale | −1.07K | $85.32 | −$91.3K | −1.0%104.1K after | |
| Aug 5, 2026 (view filing)4:05 PM ET | Aug 3 | 2 days | Werner Robert F.Chief Accounting Officer | SSale | −167 | $85.32 | −$14.2K | −0.4%46.2K after | |
| Aug 5, 2026 (view filing)4:05 PM ET | Aug 3 | 2 days | Leproust Emily M.Chief Executive Officer | SSale | −5.10K | $85.32 | −$435.2K | −0.6%818.9K after | |
| Aug 5, 2026 (view filing)4:05 PM ET | Aug 3 | 2 days | Green PaulaSVP of Human Resources | SSale | −1.13K | $85.32 | −$96.7K | −0.9%119.3K after | |
| Aug 5, 2026 (view filing)4:05 PM ET | Aug 3 | 2 days | Finn Patrick JohnPresident and COO | SSale | −2.89K | $85.32 | −$246.4K | −1.1%269.7K after | |
| Aug 7, 2026 (view filing)4:05 PM ET | Aug 5 | 2 days | Cho DennisSee Remarks | SSale | −14.2K | $109.75 | −$1.56M | −13.6%89.9K after | 10b5-1 |
| Aug 11, 2026 (view filing)4:05 PM ET | Aug 7 | 4 days | Chess RobertDirector | SSale | −18.4K | $110.89 | −$2.04M | −46.6%21.1K after | 10b5-1 |
| Aug 12, 2026 (view filing)4:05 PM ET | Aug 10 | 2 days | Leproust Emily M.Chief Executive Officer | SSale | −113.3K | $125.16 | −$14.2M | −12.2%818.9K after | 10b5-1 |
| Aug 14, 2026 (view filing)4:05 PM ET | Aug 12 | 2 days | Leproust Emily M.Chief Executive Officer | SSale | −20.0K | $125.08 | −$2.50M | −2.4%818.9K after | 10b5-1 |
| Aug 14, 2026 (view filing)4:12 PM ET | Aug 12 | 2 days | Blake KatrynDirector | SSale | −2.24K | $122.88 | −$275.3K | −11.5%17.2K after | |
| Aug 20, 2026 (view filing)4:05 PM ET | Aug 18 | 2 days | Finn Patrick JohnPresident and COO | SSale | −78.4K | $117.64 | −$9.22M | −26.7%214.7K after | 7 lots10b5-1 |
| Aug 21, 2026 (view filing)4:05 PM ET | Aug 19 | 2 days | Cho DennisSee Remarks | SSale | −14.2K | $129.75 | −$1.84M | −15.8%75.7K after | 10b5-1 |
| Aug 25, 2026 (view filing)4:05 PM ET | Aug 21-24 | 4 days | Werner Robert F.Chief Accounting Officer | SSale | −1.52K | $140.02 | −$213.3K | −3.3%44.6K after | 2 lots |
| Aug 25, 2026 (view filing)4:05 PM ET | Aug 21 | 4 days | Leproust Emily M.Chief Executive Officer | SSale | −6.64K | $139.07 | −$923.3K | −0.8%812.3K after | |
| Aug 25, 2026 (view filing)4:05 PM ET | Aug 21 | 4 days | Laponis AdamChief Financial Officer | SSale | −1.97K | $139.07 | −$273.3K | −1.8%108.6K after | |
| Aug 25, 2026 (view filing)4:05 PM ET | Aug 21 | 4 days | Green PaulaSVP of Human Resources | SSale | −1.36K | $139.07 | −$189.1K | −1.1%117.9K after | |
| Aug 25, 2026 (view filing)4:05 PM ET | Aug 21 | 4 days | Finn Patrick JohnPresident and COO | SSale | −4.05K | $139.07 | −$562.7K | −1.9%210.8K after | |
| Aug 25, 2026 (view filing)4:05 PM ET | Aug 21 | 4 days | Cho DennisSee Remarks | SSale | −1.60K | $139.07 | −$222.2K | −2.1%74.1K after | |
| Aug 27, 2026 (view filing)4:05 PM ET | Aug 25 | 2 days | Leproust Emily M.Chief Executive Officer | SSale | −41.6K | $151.98 | −$6.32M | −5.1%770.7K after | 5 lots10b5-1 |
| Sep 10, 2026 (view filing)4:00 PM ET | Sep 8 | 2 days | Werner Robert F.Chief Accounting Officer | SSale | −238 | $122.62 | −$29.2K | −0.5%44.4K after | |
| Sep 10, 2026 (view filing)4:00 PM ET | Sep 8 | 2 days | Leproust Emily M.Chief Executive Officer | SSale | −2.30K | $122.62 | −$282.3K | −0.3%768.4K after | |
| Sep 10, 2026 (view filing)4:00 PM ET | Sep 8 | 2 days | Green PaulaSVP of Human Resources | SSale | −907 | $122.62 | −$111.2K | −0.8%117.0K after | |
| Sep 10, 2026 (view filing)4:00 PM ET | Sep 8 | 2 days | Cho DennisSee Remarks | SSale | −412 | $122.62 | −$50.5K | −0.6%73.7K after | |
| Sep 21, 2026 (view filing)4:05 PM ET | Sep 17 | 4 days | Leproust Emily M.Chief Executive Officer | SSale | −356.5K | $157.99 | −$56.3M | −36.5%620.6K after | 13 lots10b5-1 |
| Sep 23, 2026 (view filing)4:07 PM ET | Sep 21 | 2 days | Leproust Emily M.Chief Executive Officer | SSale | −1.69K | $165.49 | −$279.2K | −0.3%618.9K after | |
| Sep 23, 2026 (view filing)4:07 PM ET | Sep 21 | 2 days | Green PaulaSVP of Human Resources | SSale | −294 | $165.49 | −$48.7K | −0.3%116.7K after | |
| Sep 23, 2026 (view filing)4:08 PM ET | Sep 21 | 2 days | Cho DennisSee Remarks | SSale | −348 | $165.49 | −$57.6K | −0.5%73.3K after | |
| Sep 25, 2026 (view filing)4:05 PM ET | Sep 24 | 1 day | Leproust Emily M.Chief Executive Officer | SSale | −5.20K | $177.38 | −$922.9K | −0.8%613.7K after | 10 lots10b5-1 |