TWST
Twist Bioscience Corp
NASDAQ: TWST · HEALTHCARE · BIOTECHNOLOGY
$173.45
+8.51% today
Updated 2026-10-28
Market cap
$9.58B
P/E ratio
—
P/S ratio
22.19x
EPS (TTM)
$-2.23
Dividend yield
—
52W range
$23 – $220
Volume
2.5M
Twist Bioscience Corp (TWST) Insider transactions
Net insider activity
Net selling (519,656 shares)
Buy transactions
3
Sell transactions
52
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-10-05 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 1,840 | $200.44 | $368805.74 |
| 2026-10-05 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 1,017 | $202.32 | $205763.10 |
| 2026-10-05 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 481 | $201.26 | $96803.94 |
| 2026-10-05 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 432 | $203.61 | $87958.31 |
| 2026-10-05 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 297 | $205.78 | $61115.83 |
| 2026-10-05 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 290 | $204.80 | $59391.88 |
| 2026-10-05 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 146 | $206.84 | $30199.36 |
| 2026-10-05 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 45 | $207.46 | $9335.50 |
| 2026-10-02 | WERNER, ROBERT F. | Chief Accounting Officer | S | 1,482 | $188.88 | $279926.09 |
| 2026-10-02 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 45,736 | $188.88 | $8.64M |
| 2026-10-02 | LAPONIS, ADAM | Chief Financial Officer | S | 8,057 | $188.88 | $1.52M |
| 2026-10-02 | GREEN, PAULA | SVP of Human Resources | S | 10,088 | $188.88 | $1.91M |
| 2026-10-02 | FINN, PATRICK JOHN | President and COO | S | 25,714 | $188.88 | $4.86M |
| 2026-10-02 | CHO, DENNIS | See Remarks | S | 9,514 | $188.88 | $1.80M |
| 2026-10-01 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 655 | $200.00 | $131000.00 |
| 2026-09-24 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 2,485 | $175.23 | $435449.78 |
| 2026-09-24 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 945 | $176.39 | $166690.16 |
| 2026-09-24 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 515 | $180.39 | $92901.42 |
| 2026-09-24 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 501 | $183.76 | $92065.81 |
| 2026-09-24 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 330 | $178.67 | $58960.54 |
| 2026-09-24 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 164 | $177.17 | $29055.86 |
| 2026-09-24 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 143 | $179.93 | $25730.43 |
| 2026-09-24 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 83 | $184.60 | $15322.05 |
| 2026-09-24 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 21 | $181.45 | $3810.49 |
| 2026-09-24 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 16 | $182.50 | $2920.00 |
| 2026-09-21 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 1,687 | $165.49 | $279183.32 |
| 2026-09-21 | GREEN, PAULA | SVP of Human Resources | S | 294 | $165.49 | $48654.35 |
| 2026-09-21 | CHO, DENNIS | See Remarks | S | 348 | $165.49 | $57590.87 |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | M | 133,269 | — | — |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | M | 75,439 | — | — |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 232,173 | $158.09 | $36.70M |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | M | 133,269 | $26.66 | $3.55M |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | M | 75,439 | $8.82 | $665371.98 |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 32,260 | $157.49 | $5.08M |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 23,884 | $159.53 | $3.81M |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 14,493 | $160.44 | $2.33M |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 13,378 | $155.46 | $2.08M |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 11,169 | $161.49 | $1.80M |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 9,097 | $156.47 | $1.42M |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 6,644 | $152.21 | $1.01M |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 4,175 | $154.17 | $643661.00 |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 3,399 | $153.40 | $521417.14 |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 2,565 | $162.31 | $416334.38 |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 2,440 | $151.46 | $369565.57 |
| 2026-09-17 | LEPROUST, EMILY M. | Director, Chief Executive Officer | S | 869 | $163.39 | $141988.17 |
| 2026-09-08 | WERNER, ROBERT F. | Chief Accounting Officer | Sale | 238 | $122.62 | $29184.51 |
| 2026-09-08 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 2,302 | $122.62 | $282280.45 |
| 2026-09-08 | GREEN, PAULA | SVP of Human Resources | Sale | 907 | $122.62 | $111219.97 |
| 2026-09-08 | CHO, DENNIS | See Remarks | Sale | 412 | $122.62 | $50521.09 |
| 2026-08-25 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 12,648 | $150.56 | $1.90M |
| 2026-08-25 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 12,236 | $151.36 | $1.85M |
| 2026-08-25 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 9,181 | $153.93 | $1.41M |
| 2026-08-25 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 6,412 | $152.75 | $979433.00 |
| 2026-08-25 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 1,093 | $154.45 | $168809.48 |
| 2026-08-24 | WERNER, ROBERT F. | Chief Accounting Officer | Sale | 854 | $140.77 | $120220.14 |
| 2026-08-21 | WERNER, ROBERT F. | Chief Accounting Officer | Sale | 669 | $139.07 | $93035.15 |
| 2026-08-21 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 6,639 | $139.07 | $923259.17 |
| 2026-08-21 | LAPONIS, ADAM | Chief Financial Officer | Sale | 1,965 | $139.07 | $273264.69 |
| 2026-08-21 | GREEN, PAULA | SVP of Human Resources | Sale | 1,360 | $139.07 | $189129.76 |
| 2026-08-21 | FINN, PATRICK JOHN | President and COO | Sale | 4,046 | $139.07 | $562661.04 |
| 2026-08-21 | CHO, DENNIS | See Remarks | Sale | 1,598 | $139.07 | $222227.47 |
| 2026-08-19 | CHO, DENNIS | See Remarks | Sale | 14,205 | $129.75 | $1.84M |
| 2026-08-18 | FINN, PATRICK JOHN | President and COO | Sale | 23,355 | — | — |
| 2026-08-18 | FINN, PATRICK JOHN | President and COO | Sale | 33,354 | $115.90 | $3.87M |
| 2026-08-18 | FINN, PATRICK JOHN | President and COO | Buy | 23,355 | $67.85 | $1.58M |
| 2026-08-18 | FINN, PATRICK JOHN | President and COO | Sale | 12,917 | $119.86 | $1.55M |
| 2026-08-18 | FINN, PATRICK JOHN | President and COO | Sale | 10,420 | $116.82 | $1.22M |
| 2026-08-18 | FINN, PATRICK JOHN | President and COO | Sale | 8,868 | $117.70 | $1.04M |
| 2026-08-18 | FINN, PATRICK JOHN | President and COO | Sale | 6,296 | $121.01 | $761860.07 |
| 2026-08-18 | FINN, PATRICK JOHN | President and COO | Sale | 4,500 | $119.04 | $535680.00 |
| 2026-08-18 | FINN, PATRICK JOHN | President and COO | Sale | 2,000 | $122.58 | $245162.00 |
| 2026-08-12 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 19,952 | — | — |
| 2026-08-12 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 19,952 | $125.08 | $2.50M |
| 2026-08-12 | BLAKE, KATRYN | Director | Sale | 2,240 | $122.88 | $275251.20 |
| 2026-08-10 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 113,318 | — | — |
| 2026-08-10 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 113,318 | $125.16 | $14.18M |
| 2026-08-07 | CHESS, ROBERT | Director | Sale | 18,417 | — | — |
| 2026-08-07 | CHESS, ROBERT | Director | Buy | 18,417 | $11.89 | $218978.13 |
| 2026-08-05 | CHO, DENNIS | See Remarks | Sale | 14,205 | $109.75 | $1.56M |
| 2026-08-03 | WERNER, ROBERT F. | Chief Accounting Officer | Sale | 167 | $85.32 | $14248.64 |
| 2026-08-03 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 5,101 | $85.32 | $435223.44 |
| 2026-08-03 | GREEN, PAULA | SVP of Human Resources | Sale | 1,133 | $85.32 | $96668.92 |
| 2026-08-03 | FINN, PATRICK JOHN | President and COO | Sale | 2,888 | $85.32 | $246407.63 |
| 2026-08-03 | CHO, DENNIS | See Remarks | Sale | 1,070 | $85.32 | $91293.68 |
| 2026-07-23 | FINN, PATRICK JOHN | President and COO | Sale | 2,238 | $93.89 | $210132.53 |
| 2026-07-09 | LAPONIS, ADAM | Chief Financial Officer | Sale | 2,399 | $94.33 | $226307.27 |
| 2026-06-25 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 18,880 | $95.00 | $1.79M |
| 2026-06-24 | CHO, DENNIS | See Remarks | Sale | 14,205 | $89.75 | $1.27M |
| 2026-06-22 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 1,688 | $87.32 | $147400.21 |
| 2026-06-22 | GREEN, PAULA | SVP of Human Resources | Sale | 291 | $87.32 | $25410.82 |
| 2026-06-22 | CHO, DENNIS | See Remarks | Sale | 346 | $87.32 | $30213.55 |
| 2026-06-15 | GREEN, PAULA | SVP of Human Resources | Sale | 26,137 | — | — |
| 2026-06-15 | GREEN, PAULA | SVP of Human Resources | Buy | 26,137 | $23.33 | $609776.21 |
| 2026-06-15 | GREEN, PAULA | SVP of Human Resources | Sale | 24,109 | $81.62 | $1.97M |
| 2026-06-15 | GREEN, PAULA | SVP of Human Resources | Sale | 2,028 | $82.17 | $166631.63 |
| 2026-06-08 | WERNER, ROBERT F. | Chief Accounting Officer | Sale | 1,127 | $69.07 | $77841.89 |
| 2026-06-08 | WERNER, ROBERT F. | Chief Accounting Officer | Sale | 500 | — | — |
| 2026-06-08 | WERNER, ROBERT F. | Chief Accounting Officer | Sale | 232 | $69.84 | $16203.85 |
| 2026-06-08 | LEPROUST, EMILY M. | Director, Chief Executive Officer | Sale | 2,265 | $69.84 | $158197.11 |
| 2026-06-08 | GREEN, PAULA | SVP of Human Resources | Sale | 884 | $69.84 | $61742.27 |
Frequently asked questions
Are TWST insiders buying or selling?
Over the transactions on record, TWST insiders have been net sellers, with about $45.79M in stock sold across 52 sales, against 3 open-market purchases.
Does insider selling at TWST mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which TWST insiders are selling the most?
Recent selling is concentrated in a few names. LEPROUST, EMILY M. accounts for the largest share on record, with about $26.74M sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.