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 |
|---|---|---|---|---|---|---|---|---|---|
| May 7, 2025 (view filing) | May 5 | 2 days | Finn Patrick JohnPresident and COO | SSale | −2.80K | $37.65 | −$105.4K | −1.1%262.7K after | |
| May 7, 2025 (view filing) | May 5 | 2 days | Cho DennisSee Remarks | SSale | −689 | $37.65 | −$25.9K | −0.6%110.8K after | |
| May 9, 2025 (view filing) | May 7 | 2 days | Cho DennisSee Remarks | SSale | −5.00K | $32.72 | −$163.6K | −4.5%105.8K after | |
| May 12, 2025 (view filing) | May 8 | 4 days | Finn Patrick JohnPresident and COO | SSale | −20.0K | $32.31 | −$646.2K | −7.6%242.7K after | |
| May 23, 2025 (view filing) | May 21 | 2 days | Laponis AdamChief Financial Officer | SSale | −936 | $29.75 | −$27.8K | −0.9%106.0K after | |
| May 23, 2025 (view filing) | May 21 | 2 days | Werner Robert F.Chief Accounting Officer | SSale | −242 | $29.75 | −$7.20K | −0.5%51.0K after | |
| May 23, 2025 (view filing) | May 21 | 2 days | Leproust Emily M.Chief Executive Officer | SSale | −2.80K | $29.75 | −$83.4K | −0.4%649.6K after | |
| May 23, 2025 (view filing) | May 21 | 2 days | Green PaulaSVP of Human Resources | SSale | −632 | $29.75 | −$18.8K | −0.5%128.7K after | |
| May 23, 2025 (view filing) | May 21 | 2 days | Finn Patrick JohnPresident and COO | SSale | −1.88K | $29.75 | −$55.8K | −0.8%240.8K after | |
| May 23, 2025 (view filing) | May 21 | 2 days | Cho DennisSee Remarks | SSale | −531 | $29.75 | −$15.8K | −0.5%105.3K after | |
| May 28, 2025 (view filing) | May 23 | 5 days | Werner Robert F.Chief Accounting Officer | SSale | −839 | $27.73 | −$23.3K | −1.6%50.2K after | |
| Jun 10, 2025 (view filing) | Jun 6 | 4 days | Werner Robert F.Chief Accounting Officer | SSale | −225 | $31.75 | −$7.14K | −0.4%50.0K after | |
| Jun 10, 2025 (view filing) | Jun 6 | 4 days | Leproust Emily M.Chief Executive Officer | SSale | −2.17K | $31.75 | −$68.9K | −0.3%647.5K after | |
| Jun 10, 2025 (view filing) | Jun 6 | 4 days | Green PaulaSVP of Human Resources | SSale | −853 | $31.75 | −$27.1K | −0.7%127.9K after | |
| Jun 10, 2025 (view filing) | Jun 6 | 4 days | Cho DennisSee Remarks | SSale | −257 | $31.75 | −$8.16K | −0.2%105.1K after | |
| Jun 18, 2025 (view filing) | Jun 16 | 2 days | Cho DennisSee Remarks | SSale | −94 | $33.48 | −$3.15K | −0.1%105.0K after | |
| Jun 24, 2025 (view filing) | Jun 20 | 4 days | Cho DennisSee Remarks | SSale | −230 | $35.76 | −$8.22K | −0.2%104.7K after | |
| Jun 24, 2025 (view filing) | Jun 20 | 4 days | Green PaulaSVP of Human Resources | SSale | −292 | $35.76 | −$10.4K | −0.2%127.6K after | |
| Jun 24, 2025 (view filing) | Jun 20 | 4 days | Leproust Emily M.Chief Executive Officer | SSale | −1.68K | $35.76 | −$60.0K | −0.3%645.8K after | |
| Jul 7, 2025 (view filing) | Jul 2 | 5 days | Green PaulaSVP of Human Resources | SSale | −142 | $36.19 | −$5.14K | −0.1%127.5K after | |
| Jul 7, 2025 (view filing) | Jul 2 | 5 days | Leproust Emily M.Chief Executive Officer | SSale | −476 | $36.19 | −$17.2K | −0.1%645.3K after | |
| Jul 7, 2025 (view filing) | Jul 2 | 5 days | Finn Patrick JohnPresident and COO | SSale | −209 | $36.19 | −$7.56K | −0.1%240.6K after | |
| Jul 7, 2025 (view filing) | Jul 2 | 5 days | Cho DennisSee Remarks | SSale | −125 | $36.19 | −$4.52K | −0.1%104.6K after | |
| Jul 11, 2025 (view filing) | Jul 9 | 2 days | Laponis AdamChief Financial Officer | SSale | −2.45K | $38.15 | −$93.4K | −2.3%103.6K after | |
| Jul 25, 2025 (view filing) | Jul 23 | 2 days | Finn Patrick JohnPresident and COO | SSale | −2.23K | $35.74 | −$79.8K | −0.9%238.3K after | |
| Aug 6, 2025 (view filing) | Aug 4 | 2 days | Finn Patrick JohnPresident and COO | SSale | −3.19K | $28.36 | −$90.4K | −1.3%235.2K after | |
| Aug 6, 2025 (view filing) | Aug 4 | 2 days | Cho DennisSee Remarks | SSale | −785 | $28.36 | −$22.3K | −0.8%103.8K after | |
| Aug 6, 2025 (view filing) | Aug 4 | 2 days | Green PaulaSVP of Human Resources | SSale | −1.25K | $28.36 | −$35.6K | −1.0%126.2K after | |
| Aug 6, 2025 (view filing) | Aug 4 | 2 days | Leproust Emily M.Chief Executive Officer | SSale | −5.58K | $28.36 | −$158.4K | −0.9%639.7K after | |
| Aug 6, 2025 (view filing) | Aug 4 | 2 days | Werner Robert F.Chief Accounting Officer | SSale | −186 | $28.36 | −$5.27K | −0.4%49.8K after | |
| Aug 25, 2025 (view filing) | Aug 21 | 4 days | Cho DennisSee Remarks | SSale | −521 | $25.96 | −$13.5K | −0.5%103.3K after | |
| Aug 25, 2025 (view filing) | Aug 21 | 4 days | Finn Patrick JohnPresident and COO | SSale | −1.84K | $25.96 | −$47.8K | −0.8%233.5K after | |
| Aug 25, 2025 (view filing) | Aug 21 | 4 days | Laponis AdamChief Financial Officer | SSale | −918 | $25.96 | −$23.8K | −0.9%102.9K after | |
| Aug 25, 2025 (view filing) | Aug 21 | 4 days | Green PaulaSVP of Human Resources | SSale | −619 | $25.96 | −$16.1K | −0.5%125.7K after | |
| Aug 25, 2025 (view filing) | Aug 21 | 4 days | Werner Robert F.Chief Accounting Officer | SSale | −238 | $25.96 | −$6.18K | −0.5%49.5K after | |
| Aug 25, 2025 (view filing) | Aug 21 | 4 days | Leproust Emily M.Chief Executive Officer | SSale | −2.72K | $25.96 | −$70.5K | −0.4%637.0K after | |
| Aug 27, 2025 (view filing) | Aug 25 | 2 days | Werner Robert F.Chief Accounting Officer | SSale | −853 | $27.69 | −$23.6K | −1.7%48.7K after | |
| Sep 10, 2025 (view filing) | Sep 8 | 2 days | Werner Robert F.Chief Accounting Officer | SSale | −235 | $25.76 | −$6.05K | −0.5%48.5K after | |
| Sep 10, 2025 (view filing) | Sep 8 | 2 days | Leproust Emily M.Chief Executive Officer | SSale | −2.27K | $25.76 | −$58.3K | −0.4%634.7K after | |
| Sep 10, 2025 (view filing) | Sep 8 | 2 days | Green PaulaSVP of Human Resources | SSale | −892 | $25.76 | −$23.0K | −0.7%124.8K after | |
| Sep 10, 2025 (view filing) | Sep 8 | 2 days | Cho DennisSee Remarks | SSale | −269 | $25.76 | −$6.93K | −0.3%103.0K after | |
| Sep 17, 2025 (view filing) | Sep 15 | 2 days | Cho DennisSee Remarks | SSale | −94 | $25.33 | −$2.38K | −0.1%102.9K after | |
| Sep 24, 2025 (view filing) | Sep 22 | 2 days | Leproust Emily M.Chief Executive Officer | SSale | −1.70K | $27.56 | −$47.0K | −0.3%633.0K after | |
| Sep 24, 2025 (view filing) | Sep 22 | 2 days | Green PaulaSVP of Human Resources | SSale | −295 | $27.56 | −$8.13K | −0.2%124.5K after | |
| Sep 24, 2025 (view filing) | Sep 22 | 2 days | Cho DennisSee Remarks | SSale | −233 | $27.56 | −$6.42K | −0.2%102.7K after | |
| Oct 6, 2025 (view filing) | Oct 2 | 4 days | Finn Patrick JohnPresident and COO | SSale | −206 | $29.16 | −$6.01K | −0.1%232.5K after | |
| Oct 6, 2025 (view filing) | Oct 2 | 4 days | Leproust Emily M.Chief Executive Officer | SSale | −476 | $29.16 | −$13.9K | −0.1%632.6K after | |
| Oct 6, 2025 (view filing) | Oct 2 | 4 days | Green PaulaSVP of Human Resources | SSale | −140 | $29.16 | −$4.08K | −0.1%124.4K after | |
| Oct 6, 2025 (view filing) | Oct 2 | 4 days | Cho DennisSee Remarks | SSale | −124 | $29.16 | −$3.62K | −0.1%102.6K after | |
| Oct 8, 2025 (view filing) | Oct 6 | 2 days | Cho DennisSee Remarks | SSale | −3.88K | $32.19 | −$124.8K | −3.8%98.7K after |