Twist Bioscience Corp (TWST) Insider Ownership

Historic Insider Ownership Trends

Based on data from the past 90 days ending January 10, 2026, Twist Bioscience's three largest insider shareholders are Chief Executive Officer Emily M. Leproust (874.31K shares), See Remark William Banyai (345.19K shares), President And Coo Patrick John Finn (332.88K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Emily M. Leproust Chief Executive Officer 874,313 23 Dec, 2025
William Banyai See Remark 345,188 07 May, 2024
Patrick John Finn President And Coo 332,883 25 Nov, 2025
Paula Green Svp Of Human Resources 166,639 23 Dec, 2025
Dennis Cho Nan 144,680 23 Dec, 2025
Adam Laponis Chief Financial Officer 142,769 25 Nov, 2025
Keith Crandell 142,111 07 Feb, 2025
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 65,913 10 Dec, 2025
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.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
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
21 Nov, 2025 Emily M. Leproust Common Stock D 2,663 $26.50 878,173 D S
21 Nov, 2025 Paula Green Common Stock D 598 $26.50 167,789 D S
21 Nov, 2025 Patrick John Finn Common Stock D 1,776 $26.50 332,883 D S
21 Nov, 2025 Adam Laponis Common Stock D 887 $26.50 142,769 D S
21 Nov, 2025 Dennis Cho Common Stock D 757 $26.50 145,402 D S
18 Nov, 2025 Jan Johannessen Common Stock D 7,044 $24.77 14,859 D S
18 Nov, 2025 Robert F. Werner Common Stock A 16,324 $0.00 67,194 D A
18 Nov, 2025 Emily M. Leproust Common Stock A 146,914 $0.00 880,836 D A
18 Nov, 2025 Paula Green Common Stock A 26,200 $0.00 168,387 D A
18 Nov, 2025 Patrick John Finn Common Stock A 68,740 $0.00 334,659 D A
18 Nov, 2025 Adam Laponis Common Stock A 32,648 $0.00 143,656 D A