TWIST BIOSCIENCE CORP (TWST) — insider trading
Health Care · NASDAQ
TWIST BIOSCIENCE CORP (TWST) has 150 reported SEC Form 4 insider transactions in our data, including 85 open-market sales among the most recent 100 (latest 2026-10-05).
Recent Form 4 transactions
Showing the 100 most recent of 150 recorded transactions. See all on SEC EDGAR →
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-10-05 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 45 | $207.46 | $9.3K | Form 4 |
| 2026-10-05 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 146 | $206.84 | $30.2K | Form 4 |
| 2026-10-05 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 297 | $205.78 | $61.1K | Form 4 |
| 2026-10-05 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 290 | $204.80 | $59.4K | Form 4 |
| 2026-10-05 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 432 | $203.61 | $88.0K | Form 4 |
| 2026-10-05 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 1,017 | $202.32 | $205.8K | Form 4 |
| 2026-10-05 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 481 | $201.26 | $96.8K | Form 4 |
| 2026-10-05 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 1,840 | $200.44 | $368.8K | Form 4 |
| 2026-10-02 | WERNER ROBERT F. | Officer (Chief Accounting Officer) | Open-market sale | 1,482 | $188.88 | $279.9K | Form 4 |
| 2026-10-02 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 45,736 | $188.88 | $8.64M | Form 4 |
| 2026-10-02 | Laponis Adam | Officer (Chief Financial Officer) | Open-market sale | 8,057 | $188.88 | $1.52M | Form 4 |
| 2026-10-02 | Green Paula | Officer (SVP of Human Resources) | Open-market sale | 10,088 | $188.88 | $1.91M | Form 4 |
| 2026-10-02 | Finn Patrick John | Officer (President and COO) | Open-market sale | 25,714 | $188.88 | $4.86M | Form 4 |
| 2026-10-02 | Cho Dennis | Officer (See Remarks) | Open-market sale | 9,514 | $188.88 | $1.80M | Form 4 |
| 2026-10-01 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 655 | $200.00 | $131.0K | Form 4 |
| 2026-09-24 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 83 | $184.60 | $15.3K | Form 4 |
| 2026-09-24 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 501 | $183.76 | $92.1K | Form 4 |
| 2026-09-24 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 16 | $182.50 | $2.9K | Form 4 |
| 2026-09-24 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 21 | $181.45 | $3.8K | Form 4 |
| 2026-09-24 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 515 | $180.39 | $92.9K | Form 4 |
| 2026-09-24 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 143 | $179.93 | $25.7K | Form 4 |
| 2026-09-24 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 330 | $178.67 | $59.0K | Form 4 |
| 2026-09-24 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 164 | $177.17 | $29.1K | Form 4 |
| 2026-09-24 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 945 | $176.39 | $166.7K | Form 4 |
| 2026-09-24 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 2,485 | $175.23 | $435.4K | Form 4 |
| 2026-09-21 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 1,687 | $165.49 | $279.2K | Form 4 |
| 2026-09-21 | Green Paula | Officer (SVP of Human Resources) | Open-market sale | 294 | $165.49 | $48.7K | Form 4 |
| 2026-09-21 | Cho Dennis | Officer (See Remarks) | Open-market sale | 348 | $165.49 | $57.6K | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 133,269 | — | $0 | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 75,439 | — | $0 | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 869 | $163.39 | $142.0K | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 2,565 | $162.31 | $416.3K | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 11,169 | $161.49 | $1.80M | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 14,493 | $160.44 | $2.33M | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 23,884 | $159.53 | $3.81M | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 232,173 | $158.09 | $36.70M | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 32,260 | $157.49 | $5.08M | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 9,097 | $156.47 | $1.42M | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 13,378 | $155.46 | $2.08M | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 4,175 | $154.17 | $643.7K | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 3,399 | $153.40 | $521.4K | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 6,644 | $152.21 | $1.01M | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 2,440 | $151.46 | $369.6K | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Option exercise / conversion | 75,439 | $8.82 | $665.4K | Form 4 |
| 2026-09-17 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Option exercise / conversion | 133,269 | $26.66 | $3.55M | Form 4 |
| 2026-09-08 | WERNER ROBERT F. | Officer (Chief Accounting Officer) | Open-market sale | 238 | $122.62 | $29.2K | Form 4 |
| 2026-09-08 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 2,302 | $122.62 | $282.3K | Form 4 |
| 2026-09-08 | Green Paula | Officer (SVP of Human Resources) | Open-market sale | 907 | $122.62 | $111.2K | Form 4 |
| 2026-09-08 | Cho Dennis | Officer (See Remarks) | Open-market sale | 412 | $122.62 | $50.5K | Form 4 |
| 2026-08-25 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 1,093 | $154.45 | $168.8K | Form 4 |
| 2026-08-25 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 9,181 | $153.93 | $1.41M | Form 4 |
| 2026-08-25 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 6,412 | $152.75 | $979.4K | Form 4 |
| 2026-08-25 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 12,236 | $151.36 | $1.85M | Form 4 |
| 2026-08-25 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 12,648 | $150.56 | $1.90M | Form 4 |
| 2026-08-24 | WERNER ROBERT F. | Officer (Chief Accounting Officer) | Open-market sale | 854 | $140.77 | $120.2K | Form 4 |
| 2026-08-21 | WERNER ROBERT F. | Officer (Chief Accounting Officer) | Open-market sale | 669 | $139.07 | $93.0K | Form 4 |
| 2026-08-21 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 6,639 | $139.07 | $923.3K | Form 4 |
| 2026-08-21 | Laponis Adam | Officer (Chief Financial Officer) | Open-market sale | 1,965 | $139.07 | $273.3K | Form 4 |
| 2026-08-21 | Green Paula | Officer (SVP of Human Resources) | Open-market sale | 1,360 | $139.07 | $189.1K | Form 4 |
| 2026-08-21 | Finn Patrick John | Officer (President and COO) | Open-market sale | 4,046 | $139.07 | $562.7K | Form 4 |
| 2026-08-21 | Cho Dennis | Officer (See Remarks) | Open-market sale | 1,598 | $139.07 | $222.2K | Form 4 |
| 2026-08-19 | Cho Dennis | Officer (See Remarks) | Open-market sale | 14,205 | $129.75 | $1.84M | Form 4 |
| 2026-08-18 | Finn Patrick John | Officer (President and COO) | Option exercise / conversion (derivative) | 23,355 | — | $0 | Form 4 |
| 2026-08-18 | Finn Patrick John | Officer (President and COO) | Open-market sale | 2,000 | $122.58 | $245.2K | Form 4 |
| 2026-08-18 | Finn Patrick John | Officer (President and COO) | Open-market sale | 6,296 | $121.01 | $761.9K | Form 4 |
| 2026-08-18 | Finn Patrick John | Officer (President and COO) | Open-market sale | 12,917 | $119.86 | $1.55M | Form 4 |
| 2026-08-18 | Finn Patrick John | Officer (President and COO) | Open-market sale | 4,500 | $119.04 | $535.7K | Form 4 |
| 2026-08-18 | Finn Patrick John | Officer (President and COO) | Open-market sale | 8,868 | $117.70 | $1.04M | Form 4 |
| 2026-08-18 | Finn Patrick John | Officer (President and COO) | Open-market sale | 10,420 | $116.82 | $1.22M | Form 4 |
| 2026-08-18 | Finn Patrick John | Officer (President and COO) | Open-market sale | 33,354 | $115.90 | $3.87M | Form 4 |
| 2026-08-18 | Finn Patrick John | Officer (President and COO) | Option exercise / conversion | 23,355 | $67.85 | $1.58M | Form 4 |
| 2026-08-12 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 19,952 | — | $0 | Form 4 |
| 2026-08-12 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 19,952 | $125.08 | $2.50M | Form 4 |
| 2026-08-12 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Option exercise / conversion | 19,952 | $26.66 | $531.9K | Form 4 |
| 2026-08-12 | BLAKE KATRYN | Director | Open-market sale | 2,240 | $122.88 | $275.3K | Form 4 |
| 2026-08-10 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 113,318 | — | $0 | Form 4 |
| 2026-08-10 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 113,318 | $125.16 | $14.18M | Form 4 |
| 2026-08-10 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Option exercise / conversion | 113,318 | $26.66 | $3.02M | Form 4 |
| 2026-08-07 | CHESS ROBERT | Director | Option exercise / conversion (derivative) | 18,417 | — | $0 | Form 4 |
| 2026-08-07 | CHESS ROBERT | Director | Open-market sale | 18,417 | $110.89 | $2.04M | Form 4 |
| 2026-08-07 | CHESS ROBERT | Director | Option exercise / conversion | 18,417 | $11.89 | $219.0K | Form 4 |
| 2026-08-05 | Cho Dennis | Officer (See Remarks) | Open-market sale | 14,205 | $109.75 | $1.56M | Form 4 |
| 2026-08-03 | Cho Dennis | Officer (See Remarks) | Open-market sale | 1,070 | $85.32 | $91.3K | Form 4 |
| 2026-08-03 | WERNER ROBERT F. | Officer (Chief Accounting Officer) | Open-market sale | 167 | $85.32 | $14.2K | Form 4 |
| 2026-08-03 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 5,101 | $85.32 | $435.2K | Form 4 |
| 2026-08-03 | Green Paula | Officer (SVP of Human Resources) | Open-market sale | 1,133 | $85.32 | $96.7K | Form 4 |
| 2026-08-03 | Finn Patrick John | Officer (President and COO) | Open-market sale | 2,888 | $85.32 | $246.4K | Form 4 |
| 2026-07-23 | Finn Patrick John | Officer (President and COO) | Open-market sale | 2,238 | $93.89 | $210.1K | Form 4 |
| 2026-07-09 | Laponis Adam | Officer (Chief Financial Officer) | Open-market sale | 2,399 | $94.33 | $226.3K | Form 4 |
| 2026-06-25 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 18,880 | $95.00 | $1.79M | Form 4 |
| 2026-06-24 | Cho Dennis | Officer (See Remarks) | Open-market sale | 14,205 | $89.75 | $1.27M | Form 4 |
| 2026-06-22 | Leproust Emily M. | Director, Officer (Chief Executive Officer) | Open-market sale | 1,688 | $87.32 | $147.4K | Form 4 |
| 2026-06-22 | Cho Dennis | Officer (See Remarks) | Open-market sale | 346 | $87.32 | $30.2K | Form 4 |
| 2026-06-22 | Green Paula | Officer (SVP of Human Resources) | Open-market sale | 291 | $87.32 | $25.4K | Form 4 |
| 2026-06-15 | Green Paula | Officer (SVP of Human Resources) | Option exercise / conversion (derivative) | 26,137 | — | $0 | Form 4 |
| 2026-06-15 | Green Paula | Officer (SVP of Human Resources) | Open-market sale | 2,028 | $82.17 | $166.6K | Form 4 |
| 2026-06-15 | Green Paula | Officer (SVP of Human Resources) | Open-market sale | 24,109 | $81.62 | $1.97M | Form 4 |
| 2026-06-15 | Green Paula | Officer (SVP of Human Resources) | Option exercise / conversion | 26,137 | $23.33 | $609.8K | Form 4 |
| 2026-06-08 | WERNER ROBERT F. | Officer (Chief Accounting Officer) | Bona fide gift | 500 | — | $0 | Form 4 |
| 2026-06-08 | WERNER ROBERT F. | Officer (Chief Accounting Officer) | Open-market sale | 1,127 | $69.07 | $77.8K | Form 4 |
Ask the chat about TWST's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: TWIST BIOSCIENCE CORP (TWST).
Last updated 2026-10-05 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.