Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Twist Bioscience Corp (TWST) since 2018 are shown in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Twist Bioscience Corp. Table 2 shows the detailed insider transactions. This company's CIK number is 1581280.
Total stock buying since 2018: $2,482,096.
Total stock sales since 2018: $203,205,797.
Total stock option exercises since 2018: $14,780,022.
| Insider Buying | Insider Sales | Option Exercises | ||||
|---|---|---|---|---|---|---|
| Year | Shares | Value | Shares | Value | Shares | Value |
| 2025 | 0 | $0 | 72,254 | $2,787,559 | 0 | $0 |
| 2024 | 0 | $0 | 118,437 | $5,127,800 | 3,600 | $31,752 |
| 2023 | 10,000 | $132,000 | 3,464 | $91,640 | 37,684 | $299,367 |
| 2022 | 8,550 | $250,096 | 70,986 | $3,054,548 | 73,510 | $1,342,259 |
| 2021 | 0 | $0 | 762,905 | $96,307,488 | 384,708 | $4,677,706 |
| 2020 | 0 | $0 | 1,114,543 | $85,973,231 | 481,691 | $7,283,377 |
| 2019 | 0 | $0 | 380,075 | $9,863,531 | 198,643 | $1,145,561 |
| 2018 | 150,000 | $2,100,000 | 0 | $0 | 0 | $0 |
| Trading Period | Insider Buying | Insider Sales | Option Exercises | |||
|---|---|---|---|---|---|---|
| year-month | Shares | Value | Shares | Value | Shares | Value |
| 2025-08 | 0 | $0 | 18,705 | $513,522 | 0 | $0 |
| 2025-07 | 0 | $0 | 5,633 | $207,646 | 0 | $0 |
| 2025-06 | 0 | $0 | 3,404 | $117,046 | 0 | $0 |
| 2025-05 | 0 | $0 | 10,633 | $392,014 | 0 | $0 |
| 2025-04 | 0 | $0 | 3,020 | $119,567 | 0 | $0 |
| 2025-03 | 0 | $0 | 6,177 | $254,351 | 0 | $0 |
| 2025-02 | 0 | $0 | 10,295 | $508,077 | 0 | $0 |
| 2025-01 | 0 | $0 | 14,387 | $675,336 | 0 | $0 |
| 2024-12 | 0 | $0 | 3,802 | $199,595 | 0 | $0 |
| 2024-11 | 0 | $0 | 34,945 | $1,611,591 | 3,600 | $31,752 |
| 2024-10 | 0 | $0 | 30,001 | $1,294,901 | 0 | $0 |
| 2024-09 | 0 | $0 | 6,122 | $258,012 | 0 | $0 |
| 2024-08 | 0 | $0 | 10,038 | $400,774 | 0 | $0 |
| 2024-07 | 0 | $0 | 5,087 | $263,981 | 0 | $0 |
| 2024-06 | 0 | $0 | 6,107 | $309,120 | 0 | $0 |
| 2024-05 | 0 | $0 | 8,882 | $329,820 | 0 | $0 |
| 2024-04 | 0 | $0 | 4,254 | $133,572 | 0 | $0 |
| 2024-03 | 0 | $0 | 5,089 | $182,650 | 0 | $0 |
| 2024-02 | 0 | $0 | 4,110 | $143,784 | 0 | $0 |
| 2023-05 | 10,000 | $132,000 | 0 | $0 | 37,684 | $299,367 |
| 2023-02 | 0 | $0 | 3,464 | $91,640 | 0 | $0 |
| 2022-11 | 0 | $0 | 3,825 | $95,241 | 27,246 | $635,649 |
| 2022-09 | 0 | $0 | 8,514 | $318,679 | 8,514 | $50,658 |
| 2022-08 | 0 | $0 | 15,175 | $741,080 | 9,000 | $104,310 |
| Trade Date | Insider Name | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2025-08-25 | Werner Robert F. (Chief Accounting Officer) | Sale | 853 | 27.69 | 23,620 |
| 2025-08-21 | Cho Dennis (See Remarks) | Sale | 521 | 25.96 | 13,527 |
| 2025-08-21 | Laponis Adam (Chief Financial Officer) | Sale | 918 | 25.96 | 23,834 |
| 2025-08-21 | Finn Patrick John (President and COO) | Sale | 1,840 | 25.96 | 47,773 |
| 2025-08-21 | Green Paula (SVP of Human Resources) | Sale | 619 | 25.96 | 16,071 |
| 2025-08-21 | Leproust Emily M. (Chief Executive Officer) | Sale | 2,716 | 25.96 | 70,518 |
| 2025-08-21 | Werner Robert F. (Chief Accounting Officer) | Sale | 238 | 25.96 | 6,179 |
| 2025-08-04 | Cho Dennis (See Remarks) | Sale | 785 | 28.36 | 22,265 |
| 2025-08-04 | Finn Patrick John (President and COO) | Sale | 3,189 | 28.36 | 90,452 |
| 2025-08-04 | Green Paula (SVP of Human Resources) | Sale | 1,255 | 28.36 | 35,596 |
| 2025-08-04 | Leproust Emily M. (Chief Executive Officer) | Sale | 5,585 | 28.36 | 158,412 |
| 2025-08-04 | Werner Robert F. (Chief Accounting Officer) | Sale | 186 | 28.36 | 5,275 |
| 2025-07-23 | Finn Patrick John (President and COO) | Sale | 2,232 | 35.74 | 79,773 |
| 2025-07-09 | Laponis Adam (Chief Financial Officer) | Sale | 2,449 | 38.15 | 93,419 |
| 2025-07-02 | Cho Dennis (See Remarks) | Sale | 125 | 36.19 | 4,524 |
| 2025-07-02 | Finn Patrick John (President and COO) | Sale | 209 | 36.19 | 7,564 |
| 2025-07-02 | Green Paula (SVP of Human Resources) | Sale | 142 | 36.19 | 5,139 |
| 2025-07-02 | Leproust Emily M. (Chief Executive Officer) | Sale | 476 | 36.19 | 17,227 |
| 2025-06-20 | Cho Dennis (See Remarks) | Sale | 230 | 35.76 | 8,223 |
| 2025-06-20 | Green Paula (SVP of Human Resources) | Sale | 292 | 35.76 | 10,440 |
| 2025-06-20 | Leproust Emily M. (Chief Executive Officer) | Sale | 1,678 | 35.76 | 59,996 |
| 2025-06-16 | Cho Dennis (See Remarks) | Sale | 94 | 33.48 | 3,146 |
| 2025-06-06 | Cho Dennis (See Remarks) | Sale | 257 | 31.75 | 8,159 |
| 2025-06-06 | Green Paula (SVP of Human Resources) | Sale | 853 | 31.75 | 27,082 |
| 2025-05-23 | Werner Robert F. (Chief Accounting Officer) | Sale | 839 | 27.73 | 23,263 |
| 2025-05-05 | Cho Dennis (See Remarks) | Sale | 689 | 37.65 | 25,941 |
| 2025-05-05 | Finn Patrick John (President and COO) | Sale | 2,800 | 37.65 | 105,422 |
| 2025-05-05 | Green Paula (SVP of Human Resources) | Sale | 1,101 | 37.65 | 41,453 |
| 2025-05-05 | Leproust Emily M. (Chief Executive Officer) | Sale | 5,042 | 37.65 | 189,836 |
| 2025-05-05 | Werner Robert F. (Chief Accounting Officer) | Sale | 162 | 37.65 | 6,099 |
| 2025-04-23 | Finn Patrick John (President and COO) | Sale | 2,058 | 39.99 | 82,309 |
| 2025-04-02 | Cho Dennis (See Remarks) | Sale | 124 | 38.73 | 4,802 |
| 2025-04-02 | Finn Patrick John (President and COO) | Sale | 206 | 38.73 | 7,978 |
| 2025-04-02 | Green Paula (SVP of Human Resources) | Sale | 140 | 38.73 | 5,422 |
| 2025-04-02 | Leproust Emily M. (Chief Executive Officer) | Sale | 492 | 38.73 | 19,056 |
| 2025-03-20 | Cho Dennis (See Remarks) | Sale | 230 | 41.68 | 9,585 |
| 2025-03-20 | Green Paula (SVP of Human Resources) | Sale | 291 | 41.68 | 12,127 |
| 2025-03-20 | Leproust Emily M. (Chief Executive Officer) | Sale | 1,726 | 41.68 | 71,932 |
| 2025-03-14 | Cho Dennis (See Remarks) | Sale | 92 | 40.05 | 3,684 |
| 2025-03-06 | Cho Dennis (See Remarks) | Sale | 277 | 40.91 | 11,332 |
| 2025-03-06 | Green Paula (SVP of Human Resources) | Sale | 918 | 40.91 | 37,558 |
| 2025-03-06 | Leproust Emily M. (Chief Executive Officer) | Sale | 2,402 | 40.91 | 98,273 |
| 2025-03-06 | Werner Robert F. (Chief Accounting Officer) | Sale | 241 | 40.91 | 9,860 |
| 2025-02-03 | Cho Dennis (See Remarks) | Sale | 806 | 49.35 | 39,777 |
| 2025-02-03 | Finn Patrick John (President and COO) | Sale | 2,845 | 49.35 | 140,406 |
| 2025-02-03 | Green Paula (SVP of Human Resources) | Sale | 1,259 | 49.35 | 62,134 |
| 2025-02-03 | Leproust Emily M. (Chief Executive Officer) | Sale | 5,200 | 49.35 | 256,630 |
| 2025-02-03 | Werner Robert F. (Chief Accounting Officer) | Sale | 185 | 49.35 | 9,130 |
| 2025-01-23 | Finn Patrick John (President and COO) | Sale | 2,422 | 50.16 | 121,499 |
| 2025-01-10 | Laponis Adam (Chief Financial Officer) | Sale | 5,886 | 43.26 | 254,646 |
| 2025-01-07 | Chess Robert | Sale | 5,000 | 50.00 | 250,000 |
| 2025-01-03 | Cho Dennis (See Remarks) | Sale | 144 | 45.59 | 6,565 |
| 2025-01-03 | Finn Patrick John (President and COO) | Sale | 229 | 45.59 | 10,440 |
| 2025-01-03 | Green Paula (SVP of Human Resources) | Sale | 160 | 45.59 | 7,294 |
| 2025-01-03 | Leproust Emily M. (Chief Executive Officer) | Sale | 546 | 45.59 | 24,892 |
| 2024-12-16 | Cho Dennis (See Remarks) | Sale | 133 | 46.81 | 6,225 |
| 2024-12-06 | Cho Dennis (See Remarks) | Sale | 367 | 52.70 | 19,342 |
| 2024-12-06 | Green Paula (SVP of Human Resources) | Sale | 860 | 52.70 | 45,325 |
| 2024-12-06 | Leproust Emily M. (Chief Executive Officer) | Sale | 2,216 | 52.70 | 116,792 |
| 2024-12-06 | Werner Robert F. (Chief Accounting Officer) | Sale | 226 | 52.70 | 11,911 |
| 2024-11-25 | Werner Robert F. (Chief Accounting Officer) | Sale | 789 | 44.20 | 34,870 |
| 2024-11-11 | Cho Dennis (See Remarks) | Sale | 1,507 | 48.00 | 72,332 |
| 2024-11-11 | Finn Patrick John (President and COO) | Sale | 10,340 | 48.00 | 496,299 |
| 2024-11-11 | Green Paula (SVP of Human Resources) | Sale | 1,347 | 48.00 | 64,653 |
| 2024-11-11 | Leproust Emily M. (Chief Executive Officer) | Sale | 7,968 | 48.00 | 382,448 |
| 2024-11-11 | Chess Robert | Sale | 3,600 | 47.37 | 170,539 |
| 2024-11-11 | Chess Robert | Option Ex | 3,600 | 8.82 | 31,752 |
| 2024-11-04 | Cho Dennis (See Remarks) | Sale | 659 | 41.56 | 27,390 |
| 2024-11-04 | Finn Patrick John (President and COO) | Sale | 2,681 | 41.56 | 111,433 |
| 2024-11-04 | Green Paula (SVP of Human Resources) | Sale | 1,057 | 41.56 | 43,933 |
| 2024-11-04 | Leproust Emily M. (Chief Executive Officer) | Sale | 4,841 | 41.56 | 201,211 |
| 2024-11-04 | Werner Robert F. (Chief Accounting Officer) | Sale | 156 | 41.56 | 6,483 |
| 2024-10-23 | Finn Patrick John (President and COO) | Sale | 2,261 | 43.09 | 97,428 |
| 2024-10-09 | Laponis Adam (Chief Financial Officer) | Sale | 856 | 41.81 | 35,791 |
| 2024-10-02 | Cho Dennis (See Remarks) | Sale | 3,104 | 43.21 | 134,126 |
| 2024-10-02 | Finn Patrick John (President and COO) | Sale | 6,865 | 43.21 | 296,643 |
| 2024-10-02 | Green Paula (SVP of Human Resources) | Sale | 3,310 | 43.21 | 143,028 |
| 2024-10-02 | Leproust Emily M. (Chief Executive Officer) | Sale | 13,605 | 43.21 | 587,885 |
| 2024-09-20 | Cho Dennis (See Remarks) | Sale | 234 | 46.94 | 10,984 |
| 2024-09-20 | Green Paula (SVP of Human Resources) | Sale | 297 | 46.94 | 13,941 |
| 2024-09-20 | Leproust Emily M. (Chief Executive Officer) | Sale | 1,730 | 46.94 | 81,207 |
| 2024-09-16 | Cho Dennis (See Remarks) | Sale | 94 | 46.42 | 4,363 |
| 2024-09-06 | Cho Dennis (See Remarks) | Sale | 275 | 39.16 | 10,769 |
| 2024-09-06 | Green Paula (SVP of Human Resources) | Sale | 912 | 39.16 | 35,714 |
| 2024-09-06 | Leproust Emily M. (Chief Executive Officer) | Sale | 2,340 | 39.16 | 91,636 |
| 2024-09-06 | Werner Robert F. (Chief Accounting Officer) | Sale | 240 | 39.16 | 9,398 |
| 2024-08-05 | Cho Dennis (See Remarks) | Sale | 709 | 39.93 | 28,307 |
| 2024-08-05 | Finn Patrick John (President and COO) | Sale | 2,885 | 39.93 | 115,186 |
| 2024-08-05 | Green Paula (SVP of Human Resources) | Sale | 1,137 | 39.93 | 45,395 |
| 2024-08-05 | Leproust Emily M. (Chief Executive Officer) | Sale | 5,139 | 39.93 | 205,179 |
| 2024-08-05 | Werner Robert F. (Chief Accounting Officer) | Sale | 168 | 39.93 | 6,707 |
| 2024-07-23 | Finn Patrick John (President and COO) | Sale | 2,207 | 56.62 | 124,971 |
| 2024-07-09 | Laponis Adam (Chief Financial Officer) | Sale | 842 | 48.91 | 41,184 |
| 2024-07-02 | Cho Dennis (See Remarks) | Sale | 126 | 48.00 | 6,048 |
| 2024-07-02 | Finn Patrick John (President and COO) | Sale | 476 | 48.00 | 22,848 |
| 2024-07-02 | Green Paula (SVP of Human Resources) | Sale | 322 | 48.00 | 15,456 |
| 2024-07-02 | Leproust Emily M. (Chief Executive Officer) | Sale | 1,114 | 48.00 | 53,474 |
| 2024-06-20 | Cho Dennis (See Remarks) | Sale | 234 | 49.41 | 11,561 |
| 2024-06-20 | Green Paula (SVP of Human Resources) | Sale | 297 | 49.41 | 14,674 |
| 2024-06-20 | Leproust Emily M. (Chief Executive Officer) | Sale | 1,732 | 49.41 | 85,578 |
| 2024-06-06 | Cho Dennis (See Remarks) | Sale | 276 | 51.33 | 14,166 |
| 2024-06-06 | Green Paula (SVP of Human Resources) | Sale | 918 | 51.33 | 47,120 |
| 2024-06-06 | Leproust Emily M. (Chief Executive Officer) | Sale | 2,408 | 51.33 | 123,600 |
| 2024-06-06 | Werner Robert F. (Chief Accounting Officer) | Sale | 242 | 51.33 | 12,421 |
| 2024-05-03 | Cho Dennis (See Remarks) | Sale | 568 | 37.13 | 21,092 |
| 2024-05-03 | Finn Patrick John (President and COO) | Sale | 2,311 | 37.13 | 85,816 |
| 2024-05-03 | Green Paula (SVP of Human Resources) | Sale | 910 | 37.13 | 33,791 |
| 2024-05-03 | Banyai William (See Remark) | Sale | 798 | 37.13 | 29,632 |
| 2024-05-03 | Leproust Emily M. (Chief Executive Officer) | Sale | 4,163 | 37.13 | 154,588 |
| 2024-05-03 | Werner Robert F. (Chief Accounting Officer) | Sale | 132 | 37.13 | 4,901 |
| 2024-04-23 | Finn Patrick John (President and COO) | Sale | 2,174 | 30.12 | 65,483 |
| 2024-04-02 | Cho Dennis (See Remarks) | Sale | 129 | 32.74 | 4,222 |
| 2024-04-02 | Finn Patrick John (President and COO) | Sale | 492 | 32.74 | 16,106 |
| 2024-04-02 | Banyai William (See Remark) | Sale | 327 | 32.74 | 10,704 |
| 2024-04-02 | Leproust Emily M. (Chief Executive Officer) | Sale | 1,132 | 32.74 | 37,057 |
| 2024-03-20 | Cho Dennis (See Remarks) | Sale | 230 | 33.52 | 7,708 |
| 2024-03-20 | Green Paula (SVP of Human Resources) | Sale | 200 | 33.52 | 6,703 |
| 2024-03-20 | Banyai William (See Remark) | Sale | 442 | 33.52 | 14,814 |
| 2024-03-20 | Leproust Emily M. (Chief Executive Officer) | Sale | 1,128 | 33.52 | 37,806 |
| 2024-03-06 | Cho Dennis (See Remarks) | Sale | 272 | 37.43 | 10,180 |
| 2024-03-06 | Green Paula (SVP of Human Resources) | Sale | 600 | 37.43 | 22,458 |
| 2024-03-06 | Banyai William (See Remark) | Sale | 549 | 37.43 | 20,549 |
| 2024-03-06 | Leproust Emily M. (Chief Executive Officer) | Sale | 1,487 | 37.43 | 55,658 |
| 2024-03-06 | Werner Robert F. (Chief Accounting Officer) | Sale | 181 | 37.43 | 6,774 |
| 2024-02-08 | Chess Robert | Sale | 4,110 | 34.98 | 143,784 |
| 2023-05-23 | Thorburn James M (Chief Financial Officer) | Option Ex | 13,324 | 11.59 | 154,425 |
| 2023-05-10 | Cho Dennis (See Remarks) | Buy | 10,000 | 13.20 | 132,000 |
| 2023-05-04 | Leproust Emily M. (Chief Executive Officer) | Option Ex | 24,360 | 5.95 | 144,942 |
| 2023-02-09 | Starovasnik Melissa A. | Sale | 1,732 | 26.45 | 45,820 |
| 2023-02-09 | Johannessen Jan | Sale | 1,732 | 26.45 | 45,820 |
| 2022-11-21 | Banyai William (See Remarks) | Sale | 2,550 | 24.90 | 63,494 |
| 2022-11-21 | Barthelemy Nicolas | Option Ex | 18,164 | 23.33 | 423,766 |
| 2022-09-16 | Green Paula (SVP of Human Resources) | Sale | 8,514 | 37.43 | 318,679 |
| 2022-09-16 | Green Paula (SVP of Human Resources) | Option Ex | 8,514 | 5.95 | 50,658 |
| 2022-08-22 | Banyai William (See Remarks) | Sale | 1,275 | 41.94 | 53,473 |
| 2022-08-17 | Thorburn James M (Chief Financial Officer) | Sale | 9,000 | 48.62 | 437,580 |
| 2022-08-17 | Thorburn James M (Chief Financial Officer) | Option Ex | 9,000 | 11.59 | 104,310 |
| 2022-08-16 | Thorburn James M (Chief Financial Officer) | Sale | 4,900 | 51.03 | 250,027 |
| 2022-07-25 | Banyai William (See Remarks) | Sale | 378 | 43.19 | 16,325 |
| 2022-07-05 | Banyai William (See Remarks) | Sale | 318 | 36.79 | 11,699 |
| 2022-06-15 | Green Paula (SVP of Human Resources) | Sale | 10,067 | 30.47 | 306,721 |
| 2022-06-15 | Green Paula (SVP of Human Resources) | Option Ex | 2,531 | 5.95 | 15,059 |
| 2022-05-23 | Banyai William (See Remarks) | Sale | 1,275 | 37.04 | 47,226 |
| 2022-05-23 | Thorburn James M (Chief Financial Officer) | Sale | 923 | 36.86 | 34,025 |
| 2022-05-20 | Thorburn James M (Chief Financial Officer) | Sale | 6,620 | 36.39 | 240,901 |
| 2022-05-20 | Thorburn James M (Chief Financial Officer) | Option Ex | 6,620 | 20.53 | 135,888 |
| 2022-05-11 | Barthelemy Nicolas | Buy | 8,550 | 29.25 | 250,096 |
| 2022-04-25 | Banyai William (See Remarks) | Sale | 378 | 33.98 | 12,844 |
| 2022-04-14 | Thorburn James M (Chief Financial Officer) | Sale | 6,620 | 43.12 | 285,454 |
| 2022-04-14 | Thorburn James M (Chief Financial Officer) | Option Ex | 6,620 | 20.53 | 135,888 |
Insider trading activities including stock purchases, stock sales, and option exercises of TWST listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Twist Bioscience Corp (symbol TWST, CIK number 1581280) see the Securities and Exchange Commission (SEC) website.