Twist Bioscience Corp (TWST) Insider Trading
Directors, officers and holders of more than 10% of TWST report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 415 transactions on file: 0 with code P, 46 with code S and 4 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 23, 2026 | Finn Patrick John | President and COO | S Sale | 2,245 | $134.59 | $302,152 |
| Oct 9, 2026 | Laponis Adam | Chief Financial Officer | S Sale | 2,462 | $156.30 | $384,823 |
| Oct 5, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 297 | $205.78 | $61,116 |
| Oct 5, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 481 | $201.26 | $96,804 |
| Oct 5, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 1,840 | $200.44 | $368,806 |
| Oct 5, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 1,017 | $202.32 | $205,763 |
| Oct 5, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 290 | $204.80 | $59,392 |
| Oct 5, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 432 | $203.61 | $87,958 |
| Oct 5, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 146 | $206.84 | $30,199 |
| Oct 5, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 45 | $207.46 | $9,336 |
| Oct 2, 2026 | Green Paula | SVP of Human Resources | S Sale | 10,088 | $188.88 | $1,905,462 |
| Oct 2, 2026 | Laponis Adam | Chief Financial Officer | S Sale | 8,057 | $188.88 | $1,521,838 |
| Oct 2, 2026 | WERNER ROBERT F. | Chief Accounting Officer | S Sale | 1,482 | $188.88 | $279,926 |
| Oct 2, 2026 | Cho Dennis | See Remarks | S Sale | 9,514 | $188.88 | $1,797,042 |
| Oct 2, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 45,736 | $188.88 | $8,638,799 |
| Oct 2, 2026 | Finn Patrick John | President and COO | S Sale | 25,714 | $188.88 | $4,856,963 |
| Oct 1, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 655 | $200.00 | $131,000 |
| Sep 24, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 164 | $177.17 | $29,056 |
| Sep 24, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 330 | $178.67 | $58,961 |
| Sep 24, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 143 | $179.93 | $25,730 |
| Sep 24, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 515 | $180.39 | $92,901 |
| Sep 24, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 501 | $183.76 | $92,066 |
| Sep 24, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 83 | $184.60 | $15,322 |
| Sep 24, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 2,485 | $175.23 | $435,450 |
| Sep 24, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 16 | $182.50 | $2,920 |
| Sep 24, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 21 | $181.45 | $3,810 |
| Sep 24, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 945 | $176.39 | $166,690 |
| Sep 21, 2026 | Cho Dennis | See Remarks | S Sale | 348 | $165.49 | $57,591 |
| Sep 21, 2026 | Green Paula | SVP of Human Resources | S Sale | 294 | $165.49 | $48,654 |
| Sep 21, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 1,687 | $165.49 | $279,183 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 2,565 | $162.31 | $416,334 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 869 | $163.39 | $141,988 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 23,884 | $159.53 | $3,810,250 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 14,493 | $160.44 | $2,325,245 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | M Exercise | 133,269 | $26.66 | $3,552,952 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 9,097 | $156.47 | $1,423,384 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 11,169 | $161.49 | $1,803,715 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 32,260 | $157.49 | $5,080,498 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | M Exercise | 75,439 | Not measured | Not measured |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | M Exercise | 75,439 | $8.82 | $665,372 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 4,175 | $154.17 | $643,661 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | M Exercise | 133,269 | Not measured | Not measured |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 6,644 | $152.21 | $1,011,291 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 2,440 | $151.46 | $369,566 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 3,399 | $153.40 | $521,417 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 13,378 | $155.46 | $2,079,701 |
| Sep 17, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 232,173 | $158.09 | $36,703,672 |
| Sep 8, 2026 | Leproust Emily M. | Chief Executive Officer | S Sale | 2,302 | $122.62 | $282,280 |
| Sep 8, 2026 | WERNER ROBERT F. | Chief Accounting Officer | S Sale | 238 | $122.62 | $29,185 |
| Sep 8, 2026 | Cho Dennis | See Remarks | S Sale | 412 | $122.62 | $50,521 |
The full Form 4 history is on the TWST company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.