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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
Sep 25, 2026 (view filing)4:05 PM ETSep 241 dayLeproust Emily M.Chief Executive OfficerSSale−5.20K$177.38−$922.9K−0.8%613.7K after10 lots10b5-1
Sep 23, 2026 (view filing)4:08 PM ETSep 212 daysCho DennisSee RemarksSSale−348$165.49−$57.6K−0.5%73.3K after
Sep 23, 2026 (view filing)4:07 PM ETSep 212 daysGreen PaulaSVP of Human ResourcesSSale−294$165.49−$48.7K−0.3%116.7K after
Sep 23, 2026 (view filing)4:07 PM ETSep 212 daysLeproust Emily M.Chief Executive OfficerSSale−1.69K$165.49−$279.2K−0.3%618.9K after
Sep 21, 2026 (view filing)4:05 PM ETSep 174 daysLeproust Emily M.Chief Executive OfficerSSale−356.5K$157.99−$56.3M−36.5%620.6K after13 lots10b5-1
Sep 10, 2026 (view filing)4:00 PM ETSep 82 daysCho DennisSee RemarksSSale−412$122.62−$50.5K−0.6%73.7K after
Sep 10, 2026 (view filing)4:00 PM ETSep 82 daysGreen PaulaSVP of Human ResourcesSSale−907$122.62−$111.2K−0.8%117.0K after
Sep 10, 2026 (view filing)4:00 PM ETSep 82 daysLeproust Emily M.Chief Executive OfficerSSale−2.30K$122.62−$282.3K−0.3%768.4K after
Sep 10, 2026 (view filing)4:00 PM ETSep 82 daysWerner Robert F.Chief Accounting OfficerSSale−238$122.62−$29.2K−0.5%44.4K after
Aug 27, 2026 (view filing)4:05 PM ETAug 252 daysLeproust Emily M.Chief Executive OfficerSSale−41.6K$151.98−$6.32M−5.1%770.7K after5 lots10b5-1
Aug 25, 2026 (view filing)4:05 PM ETAug 214 daysCho DennisSee RemarksSSale−1.60K$139.07−$222.2K−2.1%74.1K after
Aug 25, 2026 (view filing)4:05 PM ETAug 214 daysFinn Patrick JohnPresident and COOSSale−4.05K$139.07−$562.7K−1.9%210.8K after
Aug 25, 2026 (view filing)4:05 PM ETAug 214 daysGreen PaulaSVP of Human ResourcesSSale−1.36K$139.07−$189.1K−1.1%117.9K after
Aug 25, 2026 (view filing)4:05 PM ETAug 214 daysLaponis AdamChief Financial OfficerSSale−1.97K$139.07−$273.3K−1.8%108.6K after
Aug 25, 2026 (view filing)4:05 PM ETAug 214 daysLeproust Emily M.Chief Executive OfficerSSale−6.64K$139.07−$923.3K−0.8%812.3K after
Aug 25, 2026 (view filing)4:05 PM ETAug 21-244 daysWerner Robert F.Chief Accounting OfficerSSale−1.52K$140.02−$213.3K−3.3%44.6K after2 lots
Aug 21, 2026 (view filing)4:05 PM ETAug 192 daysCho DennisSee RemarksSSale−14.2K$129.75−$1.84M−15.8%75.7K after10b5-1
Aug 20, 2026 (view filing)4:05 PM ETAug 182 daysFinn Patrick JohnPresident and COOSSale−78.4K$117.64−$9.22M−26.7%214.7K after7 lots10b5-1
Aug 14, 2026 (view filing)4:12 PM ETAug 122 daysBlake KatrynDirectorSSale−2.24K$122.88−$275.3K−11.5%17.2K after
Aug 14, 2026 (view filing)4:05 PM ETAug 122 daysLeproust Emily M.Chief Executive OfficerSSale−20.0K$125.08−$2.50M−2.4%818.9K after10b5-1
Aug 12, 2026 (view filing)4:05 PM ETAug 102 daysLeproust Emily M.Chief Executive OfficerSSale−113.3K$125.16−$14.2M−12.2%818.9K after10b5-1
Aug 11, 2026 (view filing)4:05 PM ETAug 74 daysChess RobertDirectorSSale−18.4K$110.89−$2.04M−46.6%21.1K after10b5-1
Aug 7, 2026 (view filing)4:05 PM ETAug 52 daysCho DennisSee RemarksSSale−14.2K$109.75−$1.56M−13.6%89.9K after10b5-1
Aug 5, 2026 (view filing)4:05 PM ETAug 32 daysFinn Patrick JohnPresident and COOSSale−2.89K$85.32−$246.4K−1.1%269.7K after
Aug 5, 2026 (view filing)4:05 PM ETAug 32 daysGreen PaulaSVP of Human ResourcesSSale−1.13K$85.32−$96.7K−0.9%119.3K after
Aug 5, 2026 (view filing)4:05 PM ETAug 32 daysLeproust Emily M.Chief Executive OfficerSSale−5.10K$85.32−$435.2K−0.6%818.9K after
Aug 5, 2026 (view filing)4:05 PM ETAug 32 daysWerner Robert F.Chief Accounting OfficerSSale−167$85.32−$14.2K−0.4%46.2K after
Aug 5, 2026 (view filing)4:05 PM ETAug 32 daysCho DennisSee RemarksSSale−1.07K$85.32−$91.3K−1.0%104.1K after
Jul 27, 2026 (view filing)4:05 PM ETJul 234 daysFinn Patrick JohnPresident and COOSSale−2.24K$93.89−$210.1K−0.8%272.6K after
Jul 13, 2026 (view filing)4:05 PM ETJul 94 daysLaponis AdamChief Financial OfficerSSale−2.40K$94.33−$226.3K−2.1%110.3K after
Jun 26, 2026 (view filing)Jun 251 dayLeproust Emily M.Chief Executive OfficerSSale−18.9K$95.00−$1.79M−2.2%824.0K after10b5-1
Jun 26, 2026 (view filing)Jun 242 daysCho DennisSee RemarksSSale−14.2K$89.75−$1.27M−11.9%105.1K after10b5-1
Jun 24, 2026 (view filing)Jun 222 daysGreen PaulaSVP of Human ResourcesSSale−291$87.32−$25.4K−0.2%120.4K after
Jun 24, 2026 (view filing)Jun 222 daysCho DennisSee RemarksSSale−346$87.32−$30.2K−0.3%119.3K after
Jun 24, 2026 (view filing)Jun 222 daysLeproust Emily M.Chief Executive OfficerSSale−1.69K$87.32−$147.4K−0.2%842.9K after
Jun 17, 2026 (view filing)Jun 152 daysGreen PaulaSVP of Human ResourcesSSale−26.1K$81.66−$2.13M−17.8%120.7K after2 lots
Jun 10, 2026 (view filing)Jun 82 daysCho DennisSee RemarksSSale−402$69.84−$28.1K−0.3%119.7K after
Jun 10, 2026 (view filing)Jun 82 daysGreen PaulaSVP of Human ResourcesSSale−884$69.84−$61.7K−0.7%120.7K after
Jun 10, 2026 (view filing)Jun 82 daysLeproust Emily M.Chief Executive OfficerSSale−2.27K$69.84−$158.2K−0.3%844.6K after
Jun 10, 2026 (view filing)Jun 82 daysWerner Robert F.Chief Accounting OfficerSSale−1.36K$69.20−$94.0K−2.8%46.8K after2 lots
Jun 2, 2026 (view filing)May 294 daysCho DennisSee RemarksSSale−14.2K$69.75−$990.8K−10.6%120.1K after10b5-1
Jun 2, 2026 (view filing)May 294 daysLaponis AdamChief Financial OfficerSSale−4.00K$70.00−$280.0K−3.4%112.7K after10b5-1
Jun 1, 2026 (view filing)May 284 daysLeproust Emily M.Chief Executive OfficerSSale−16.5K$67.91−$1.12M−1.9%846.9K after4 lots10b5-1
Jun 1, 2026 (view filing)May 284 daysStarovasnik Melissa A.DirectorSSale−2.50K$68.00−$170.0K−10.1%22.2K after10b5-1
May 28, 2026 (view filing)May 26-272 daysLeproust Emily M.Chief Executive OfficerSSale−49.3K$65.19−$3.21M−5.5%846.9K after3 lots10b5-1
May 28, 2026 (view filing)May 262 daysWerner Robert F.Chief Accounting OfficerSSale−800$62.48−$50.0K−1.6%48.2K after
May 28, 2026 (view filing)May 262 daysStarovasnik Melissa A.DirectorSSale−500$61.04−$30.5K−2.0%24.7K after10b5-1
May 26, 2026 (view filing)May 215 daysWerner Robert F.Chief Accounting OfficerSSale−688$53.26−$36.6K−1.4%49.0K after
May 26, 2026 (view filing)May 215 daysLeproust Emily M.Chief Executive OfficerSSale−6.89K$53.26−$366.9K−0.8%846.9K after
May 26, 2026 (view filing)May 215 daysLaponis AdamChief Financial OfficerSSale−2.02K$53.26−$107.5K−1.7%116.7K after