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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.

Insider roster for Twist Bioscience Corp
NameTitleLast reported holdingLast filingFilings, past year
Leproust Emily M.Chief Executive Officer613,699Sep 25, 202630
Cho DennisSee Remarks73,303Sep 23, 202626
Green PaulaSVP of Human Resources116,720Sep 23, 202623
Werner Robert F.Chief Accounting Officer44,399Sep 10, 202619
Finn Patrick JohnPresident and COO210,802Aug 25, 202621
Laponis AdamChief Financial Officer108,633Aug 25, 202617
Blake KatrynDirector17,208Aug 14, 20262
Chess RobertDirector21,084Aug 11, 20264
Starovasnik Melissa A.Director22,222Jun 1, 20265
Johannessen JanDirector17,754May 14, 20263
Crandell KeithDirector27,571Feb 9, 20261
Ragusa Robert PDirector28,983Feb 9, 20261
Chan Nelson CDirector33,251Feb 9, 20261
Banyai WilliamSee Remark345,188May 7, 20240
Mai XiaoyingDirector31,057Feb 9, 20240
Thorburn James MChief Financial Officer86,334Jan 4, 20240
Yankton Kevin BruceChief Accounting Officer9,115May 19, 20230
Barthelemy NicolasDirector23,021Nov 23, 20220
Weiss PatrickChief Operating Officer47,401Apr 5, 20220

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.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Oct 8, 2025 (view filing)Oct 62 daysFinn Patrick JohnPresident and COOSSale−23.7K$32.19−$764.4K−10.2%208.7K after
Oct 8, 2025 (view filing)Oct 62 daysGreen PaulaSVP of Human ResourcesSSale−9.72K$32.19−$313.0K−7.8%114.7K after
Oct 8, 2025 (view filing)Oct 62 daysWerner Robert F.Chief Accounting OfficerSSale−2.04K$32.19−$65.7K−4.2%46.4K after
Oct 8, 2025 (view filing)Oct 62 daysLeproust Emily M.Chief Executive OfficerSSale−31.3K$32.19−$1.01M−5.0%601.2K after
Oct 8, 2025 (view filing)Oct 62 daysLaponis AdamChief Financial OfficerSSale−5.88K$32.19−$189.1K−5.7%97.0K after
Oct 10, 2025 (view filing)Oct 8-92 daysLaponis AdamChief Financial OfficerSSale−5.52K$31.96−$176.3K−5.7%91.5K after2 lots10b5-1
Oct 27, 2025 (view filing)Oct 234 daysFinn Patrick JohnPresident and COOSSale−2.24K$30.88−$69.2K−1.1%206.5K after
Nov 3, 2025 (view filing)Oct 304 daysWerner Robert F.Chief Accounting OfficerSSale−1.02K$31.44−$31.9K−2.0%51.0K after
Nov 3, 2025 (view filing)Oct 304 daysLaponis AdamChief Financial OfficerSSale−5.52K$31.44−$173.5K−4.7%111.0K after
Nov 3, 2025 (view filing)Oct 304 daysLeproust Emily M.Chief Executive OfficerSSale−31.4K$31.44−$986.6K−4.1%738.8K after
Nov 3, 2025 (view filing)Oct 304 daysGreen PaulaSVP of Human ResourcesSSale−6.92K$31.44−$217.6K−4.6%143.3K after
Nov 3, 2025 (view filing)Oct 304 daysFinn Patrick JohnPresident and COOSSale−17.6K$31.44−$553.5K−6.1%268.7K after
Nov 3, 2025 (view filing)Oct 304 daysCho DennisSee RemarksSSale−6.51K$31.44−$204.8K−5.1%121.7K after
Nov 5, 2025 (view filing)Nov 32 daysWerner Robert F.Chief Accounting OfficerSSale−160$32.08−$5.13K−0.3%50.9K after
Nov 5, 2025 (view filing)Nov 32 daysLeproust Emily M.Chief Executive OfficerSSale−4.89K$32.08−$156.8K−0.7%733.9K after
Nov 5, 2025 (view filing)Nov 32 daysGreen PaulaSVP of Human ResourcesSSale−1.08K$32.08−$34.8K−0.8%142.2K after
Nov 5, 2025 (view filing)Nov 32 daysFinn Patrick JohnPresident and COOSSale−2.75K$32.08−$88.4K−1.0%265.9K after
Nov 5, 2025 (view filing)Nov 32 daysCho DennisSee RemarksSSale−1.02K$32.08−$32.7K−0.8%120.7K after
Nov 20, 2025 (view filing)Nov 182 daysJohannessen JanDirectorSSale−7.04K$24.77−$174.5K−32.2%14.9K after
Nov 25, 2025 (view filing)Nov 21-244 daysWerner Robert F.Chief Accounting OfficerSSale−1.05K$28.23−$29.7K−1.6%66.1K after2 lots
Nov 25, 2025 (view filing)Nov 214 daysLeproust Emily M.Chief Executive OfficerSSale−2.66K$26.50−$70.6K−0.3%878.2K after
Nov 25, 2025 (view filing)Nov 214 daysLaponis AdamChief Financial OfficerSSale−887$26.50−$23.5K−0.6%142.8K after
Nov 25, 2025 (view filing)Nov 214 daysGreen PaulaSVP of Human ResourcesSSale−598$26.50−$15.8K−0.4%167.8K after
Nov 25, 2025 (view filing)Nov 214 daysFinn Patrick JohnPresident and COOSSale−1.78K$26.50−$47.1K−0.5%332.9K after
Nov 25, 2025 (view filing)Nov 214 daysCho DennisSee RemarksSSale−757$26.50−$20.1K−0.5%145.4K after
Dec 10, 2025 (view filing)Dec 82 daysWerner Robert F.Chief Accounting OfficerSSale−230$32.88−$7.56K−0.3%65.9K after
Dec 10, 2025 (view filing)Dec 82 daysGreen PaulaSVP of Human ResourcesSSale−877$32.88−$28.8K−0.5%166.9K after
Dec 10, 2025 (view filing)Dec 82 daysLeproust Emily M.Chief Executive OfficerSSale−2.25K$32.88−$74.1K−0.3%875.9K after
Dec 10, 2025 (view filing)Dec 82 daysCho DennisSee RemarksSSale−398$32.88−$13.1K−0.3%145.0K after
Dec 23, 2025 (view filing)Dec 221 dayLeproust Emily M.Chief Executive OfficerSSale−1.60K$34.56−$55.5K−0.2%874.3K after
Dec 23, 2025 (view filing)Dec 221 dayCho DennisSee RemarksSSale−324$34.56−$11.2K−0.2%144.7K after
Dec 23, 2025 (view filing)Dec 221 dayGreen PaulaSVP of Human ResourcesSSale−273$34.56−$9.43K−0.2%166.6K after
Jan 13, 2026 (view filing)Jan 94 daysLaponis AdamChief Financial OfficerSSale−2.74K$35.26−$96.5K−1.9%140.0K after
Jan 15, 2026 (view filing)Jan 132 daysFinn Patrick JohnPresident and COOSSale−23.3K$40.00−$931.2K−6.9%312.9K after10b5-1
Jan 15, 2026 (view filing)Jan 132 daysLaponis AdamChief Financial OfficerSSale−3.00K$40.00−$120.0K−2.1%137.0K after10b5-1
Jan 27, 2026 (view filing)Jan 234 daysFinn Patrick JohnPresident and COOSSale−2.39K$44.91−$107.3K−0.8%310.5K after
Feb 5, 2026 (view filing)Feb 32 daysCho DennisSee RemarksSSale−1.10K$46.58−$51.2K−0.8%143.6K after
Feb 5, 2026 (view filing)Feb 32 daysFinn Patrick JohnPresident and COOSSale−2.71K$46.58−$126.0K−0.9%307.8K after
Feb 5, 2026 (view filing)Feb 32 daysGreen PaulaSVP of Human ResourcesSSale−1.19K$46.58−$55.6K−0.7%165.4K after
Feb 5, 2026 (view filing)Feb 3-42 daysWerner Robert F.Chief Accounting OfficerSSale−7.17K$45.67−$327.7K−10.9%58.7K after2 lots
Feb 5, 2026 (view filing)Feb 32 daysLeproust Emily M.Chief Executive OfficerSSale−5.00K$46.58−$232.9K−0.6%869.3K after
Feb 9, 2026 (view filing)Feb 63 daysJohannessen JanDirectorSSale−2.20K$47.91−$105.4K−11.0%17.8K after
Feb 13, 2026 (view filing)Feb 112 daysCho DennisSee RemarksSSale−5.00K$49.93−$249.7K−3.5%138.6K after10b5-1
Feb 13, 2026 (view filing)Feb 121 dayLaponis AdamChief Financial OfficerSSale−7.00K$50.00−$350.0K−5.1%130.0K after10b5-1
Feb 17, 2026 (view filing)Feb 12-135 daysFinn Patrick JohnPresident and COOSSale−5.25K$50.17−$263.4K−1.7%306.3K after2 lots10b5-1
Feb 18, 2026 (view filing)Feb 135 daysChess RobertDirectorSSale−2.18K$48.26−$105.4K−9.4%21.1K after
Feb 19, 2026 (view filing)Feb 172 daysFinn Patrick JohnPresident and COOSSale−69.0K$51.65−$3.56M−19.3%287.8K after4 lots10b5-1
Feb 19, 2026 (view filing)Feb 172 daysGreen PaulaSVP of Human ResourcesSSale−39.4K$52.40−$2.06M−23.8%126.0K after
Feb 25, 2026 (view filing)Feb 232 daysLeproust Emily M.Chief Executive OfficerSSale−7.21K$46.71−$336.5K−0.8%863.1K after
Feb 25, 2026 (view filing)Feb 232 daysLaponis AdamChief Financial OfficerSSale−2.08K$46.71−$97.4K−1.6%128.3K after