Based on data from the past 90 days ending February 07, 2026, Twist Bioscience's three largest insider shareholders are Chief Executive Officer Emily M. Leproust (869.31K shares), See Remark William Banyai (345.19K shares), President And Coo Patrick John Finn (307.79K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Emily M. Leproust | Chief Executive Officer | 869,312 | 05 Feb, 2026 |
| William Banyai | See Remark | 345,188 | 07 May, 2024 |
| Patrick John Finn | President And Coo | 307,788 | 05 Feb, 2026 |
| Paula Green | Svp Of Human Resources | 165,445 | 05 Feb, 2026 |
| Dennis Cho | Nan | 143,581 | 05 Feb, 2026 |
| Keith Crandell | 142,111 | 07 Feb, 2025 | |
| Adam Laponis | Chief Financial Officer | 137,031 | 15 Jan, 2026 |
| James M Thorburn | Chief Financial Officer | 86,334 | 04 Jan, 2024 |
| Mark Daniels | Nan | 66,736 | 07 Apr, 2021 |
| Robert F. Werner | Chief Accounting Officer | 58,738 | 05 Feb, 2026 |
| Patrick Weiss | Chief Operating Officer | 47,401 | 05 Apr, 2022 |
| Xiaoying Mai | 31,057 | 09 Feb, 2024 | |
| Nelson C Chan | 28,156 | 07 Feb, 2025 | |
| Robert P Ragusa | 23,888 | 07 Feb, 2025 | |
| Nicolas Barthelemy | 23,021 | 23 Nov, 2022 | |
| Melissa A. Starovasnik | 21,627 | 07 Feb, 2025 | |
| Robert Chess | 18,173 | 11 Feb, 2025 | |
| Jan Johannessen | 14,859 | 20 Nov, 2025 | |
| Katryn Blake | 14,353 | 07 Aug, 2025 | |
| Kevin Bruce Yankton | Chief Accounting Officer | 9,115 | 19 May, 2023 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 04 Feb, 2026 | Robert F. Werner | Common Stock | D | 7,000 | $45.65 | 58,738 | D | S |
| 03 Feb, 2026 | Robert F. Werner | Common Stock | D | 175 | $46.58 | 65,738 | D | S |
| 03 Feb, 2026 | Emily M. Leproust | Common Stock | D | 5,001 | $46.58 | 869,312 | D | S |
| 03 Feb, 2026 | Paula Green | Common Stock | D | 1,194 | $46.58 | 165,445 | D | S |
| 03 Feb, 2026 | Patrick John Finn | Common Stock | D | 2,705 | $46.58 | 307,788 | D | S |
| 03 Feb, 2026 | Dennis Cho | Common Stock | D | 1,099 | $46.58 | 143,581 | D | S |
| 23 Jan, 2026 | Patrick John Finn | Common Stock | D | 2,390 | $44.91 | 310,493 | D | S |
| 13 Jan, 2026 | Patrick John Finn | Common Stock | A | 3,279 | $8.82 | 336,162 | D | M |
| 13 Jan, 2026 | Patrick John Finn | Common Stock | D | 23,279 | $40.00 | 312,883 | D | S |
| 13 Jan, 2026 | Adam Laponis | Common Stock | D | 3,000 | $40.00 | 137,031 | D | S |
| 09 Jan, 2026 | Adam Laponis | Common Stock | D | 2,738 | $35.26 | 140,031 | D | S |
| 22 Dec, 2025 | Emily M. Leproust | Common Stock | D | 1,605 | $34.56 | 874,313 | D | S |
| 22 Dec, 2025 | Paula Green | Common Stock | D | 273 | $34.56 | 166,639 | D | S |
| 22 Dec, 2025 | Dennis Cho | Common Stock | D | 324 | $34.56 | 144,680 | D | S |
| 08 Dec, 2025 | Robert F. Werner | Common Stock | D | 230 | $32.88 | 65,913 | D | S |
| 08 Dec, 2025 | Emily M. Leproust | Common Stock | D | 2,255 | $32.88 | 875,918 | D | S |
| 08 Dec, 2025 | Paula Green | Common Stock | D | 877 | $32.88 | 166,912 | D | S |
| 08 Dec, 2025 | Dennis Cho | Common Stock | D | 398 | $32.88 | 145,004 | D | S |
| 24 Nov, 2025 | Robert F. Werner | Common Stock | D | 822 | $28.71 | 66,143 | D | S |
| 21 Nov, 2025 | Robert F. Werner | Common Stock | D | 229 | $26.50 | 66,965 | D | S |