The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Maetzold Derek J since 2020.
This trader's CIK number is 1239501.
At the time of last reporting, Maetzold Derek J was the Pres. & Chief Exec. Officer of Castle Biosciences Inc. (stock ticker symbol CSTL).
Also see all insider trading activities at Castle Biosciences Inc.
| Insider Buying | Insider Sales | Option Exercises | |||||
|---|---|---|---|---|---|---|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
| 2025 | CSTL | 0 | $0 | 127,758 | $2,643,463 | 98,100 | $0 |
| 2024 | CSTL | 0 | $0 | 118,039 | $3,234,469 | 64,969 | $39,751 |
| 2023 | CSTL | 0 | $0 | 240,502 | $5,165,698 | 54,283 | $0 |
| 2022 | CSTL | 0 | $0 | 100,483 | $2,628,118 | 30,787 | $37,200 |
| 2021 | CSTL | 0 | $0 | 625,242 | $43,976,630 | 37,178 | $96,039 |
| 2020 | CSTL | 0 | $0 | 391,402 | $19,573,503 | 65,627 | $126,003 |
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2025-09-02 | CSTL | Sale | 1,339 | 23.93 | 32,042 |
| 2025-08-15 | CSTL | Sale | 1,339 | 20.04 | 26,833 |
| 2025-08-13 | CSTL | Sale | 43,019 | 19.50 | 839,042 |
| 2025-08-08 | CSTL | Option Ex | 66,991 | .00 | 0 |
| 2025-06-27 | CSTL | Sale | 22,576 | 20.30 | 458,292 |
| 2025-04-21 | CSTL | Sale | 5,644 | 21.52 | 121,447 |
| 2025-04-08 | CSTL | Sale | 974 | 20.03 | 19,509 |
| 2025-04-09 | CSTL | Sale | 4,670 | 20.22 | 94,422 |
| 2025-03-26 | CSTL | Sale | 5,644 | 20.30 | 114,573 |
| 2025-03-07 | CSTL | Sale | 27,047 | 20.40 | 551,704 |
| 2025-03-10 | CSTL | Sale | 2,130 | 19.52 | 41,573 |
| 2025-03-04 | CSTL | Option Ex | 31,109 | .00 | 0 |
| 2025-03-04 | CSTL | Sale | 5,687 | 20.86 | 118,619 |
| 2025-01-06 | CSTL | Sale | 7,058 | 29.24 | 206,390 |
| 2025-01-07 | CSTL | Sale | 631 | 30.14 | 19,017 |
| 2024-12-17 | CSTL | Sale | 9,364 | 28.55 | 267,304 |
| 2024-12-16 | CSTL | Sale | 11,059 | 28.83 | 318,864 |
| 2024-12-13 | CSTL | Sale | 15,064 | 28.82 | 434,069 |
| 2024-12-09 | CSTL | Option Ex | 33,496 | .00 | 0 |
| 2024-12-10 | CSTL | Option Ex | 20,787 | .00 | 0 |
| 2024-12-05 | CSTL | Sale | 5,127 | 31.35 | 160,741 |
| 2024-11-12 | CSTL | Sale | 5,127 | 34.15 | 175,087 |
| 2024-11-04 | CSTL | Sale | 5,127 | 32.84 | 168,375 |
| 2024-10-14 | CSTL | Sale | 5,127 | 32.27 | 165,463 |
| 2024-10-08 | CSTL | Sale | 2,562 | 30.27 | 77,549 |
| 2024-10-04 | CSTL | Sale | 2,565 | 28.73 | 73,702 |
| 2024-09-16 | CSTL | Sale | 5,127 | 30.97 | 158,793 |
| 2024-09-11 | CSTL | Sale | 2,616 | 30.32 | 79,317 |
| 2024-09-09 | CSTL | Sale | 2,586 | 29.46 | 76,175 |
| 2024-08-29 | CSTL | Sale | 3,580 | 30.07 | 107,668 |
| 2024-08-30 | CSTL | Sale | 861 | 30.10 | 25,915 |
| 2024-06-03 | CSTL | Sale | 6,336 | 23.68 | 150,068 |
| 2024-05-14 | CSTL | Sale | 6,336 | 24.56 | 155,624 |
| 2024-05-06 | CSTL | Sale | 6,336 | 24.72 | 156,625 |
| 2024-04-23 | CSTL | Sale | 1,126 | 20.11 | 22,642 |
| 2024-04-12 | CSTL | Sale | 5,210 | 20.35 | 106,023 |
| 2024-04-03 | CSTL | Sale | 6,336 | 21.70 | 137,491 |
| 2024-03-21 | CSTL | Sale | 194 | 20.70 | 4,015 |
| 2024-03-20 | CSTL | Sale | 6,142 | 20.27 | 124,498 |
| 2024-03-05 | CSTL | Option Ex | 10,686 | 3.72 | 39,751 |
| 2024-03-05 | CSTL | Sale | 4,131 | 21.41 | 88,461 |
| 2023-12-28 | CSTL | Sale | 4,511 | 22.17 | 100,008 |
| 2023-12-27 | CSTL | Sale | 9,213 | 21.90 | 201,764 |
| 2023-12-26 | CSTL | Sale | 5,909 | 21.93 | 129,584 |
| 2023-12-22 | CSTL | Sale | 5,960 | 21.96 | 130,881 |
| 2023-12-20 | CSTL | Sale | 5,934 | 21.05 | 124,881 |
| 2023-12-21 | CSTL | Sale | 12,548 | 21.40 | 268,564 |
| 2023-12-19 | CSTL | Sale | 9,033 | 20.84 | 188,211 |
| 2023-12-18 | CSTL | Sale | 7,218 | 20.27 | 146,330 |
| 2023-12-14 | CSTL | Sale | 19,128 | 21.28 | 407,043 |
| 2023-12-15 | CSTL | Sale | 4,822 | 20.21 | 97,452 |
| 2023-12-12 | CSTL | Sale | 800 | 20.01 | 16,008 |
| 2023-12-13 | CSTL | Sale | 7,632 | 20.21 | 154,242 |
| 2023-12-08 | CSTL | Sale | 4,852 | 20.10 | 97,525 |
| 2023-12-10 | CSTL | Option Ex | 20,787 | .00 | 0 |
| 2023-12-09 | CSTL | Option Ex | 33,496 | .00 | 0 |
| 2023-12-06 | CSTL | Sale | 100 | 20.02 | 2,002 |
| 2023-12-04 | CSTL | Sale | 2,883 | 20.08 | 57,890 |
| 2023-12-01 | CSTL | Sale | 6,761 | 20.06 | 135,625 |
| 2023-11-29 | CSTL | Sale | 12,004 | 20.13 | 241,640 |
| 2023-11-30 | CSTL | Sale | 9,425 | 20.07 | 189,159 |
| 2023-11-21 | CSTL | Sale | 1,584 | 20.01 | 31,695 |
| 2023-11-20 | CSTL | Sale | 4,026 | 20.04 | 80,681 |
| 2023-09-01 | CSTL | Sale | 1,500 | 20.05 | 30,078 |
| 2023-08-30 | CSTL | Sale | 3,400 | 20.03 | 68,112 |
| 2023-08-31 | CSTL | Sale | 8,555 | 20.06 | 171,596 |
| 2023-08-03 | CSTL | Sale | 600 | 20.10 | 12,060 |
| 2023-07-07 | CSTL | Sale | 25,116 | 20.04 | 503,425 |
| 2023-05-15 | CSTL | Sale | 4,612 | 23.45 | 108,137 |
| 2023-05-16 | CSTL | Sale | 3,760 | 22.82 | 85,803 |
| 2023-05-04 | CSTL | Sale | 8,372 | 21.69 | 181,555 |
| 2023-04-13 | CSTL | Sale | 5,467 | 22.68 | 123,975 |
| 2023-04-12 | CSTL | Sale | 2,905 | 22.61 | 65,687 |
| 2023-04-04 | CSTL | Sale | 1,202 | 22.10 | 26,565 |
| 2023-04-03 | CSTL | Sale | 7,170 | 22.15 | 158,786 |
| 2023-03-14 | CSTL | Sale | 8,372 | 20.95 | 175,426 |
| 2023-03-06 | CSTL | Sale | 8,372 | 24.71 | 206,855 |
| 2023-02-10 | CSTL | Sale | 7,462 | 26.17 | 195,288 |
| 2023-02-13 | CSTL | Sale | 910 | 26.26 | 23,900 |
| 2023-02-01 | CSTL | Sale | 8,384 | 27.11 | 227,265 |
| 2022-12-10 | CSTL | Option Ex | 20,787 | .00 | 0 |
| 2022-12-01 | CSTL | Option Ex | 10,000 | 3.72 | 37,200 |
| 2022-11-22 | CSTL | Sale | 2,254 | 20.51 | 46,229 |
| 2022-11-21 | CSTL | Sale | 6,704 | 20.84 | 139,711 |
| 2022-11-22 | CSTL | Sale | 2,254 | 20.51 | 46,229 |
| 2022-11-21 | CSTL | Sale | 6,704 | 20.84 | 139,711 |
| 2022-11-22 | CSTL | Sale | 2,254 | 20.51 | 46,229 |
| 2022-11-21 | CSTL | Sale | 6,704 | 20.84 | 139,711 |
| 2022-10-24 | CSTL | Sale | 8,141 | 20.41 | 166,182 |
| 2022-10-25 | CSTL | Sale | 817 | 20.98 | 17,136 |
| 2022-10-10 | CSTL | Sale | 6,514 | 25.31 | 164,888 |
| 2022-10-11 | CSTL | Sale | 1,884 | 23.19 | 43,697 |
| 2022-10-11 | CSTL | Sale | 560 | 24.05 | 13,468 |
| 2022-09-27 | CSTL | Sale | 3,844 | 24.17 | 92,905 |
| 2022-09-26 | CSTL | Sale | 5,114 | 24.36 | 124,566 |
| 2022-08-29 | CSTL | Sale | 9,659 | 29.85 | 288,321 |
| 2022-08-30 | CSTL | Sale | 700 | 29.42 | 20,594 |
| 2022-08-15 | CSTL | Sale | 15,958 | 33.68 | 537,465 |
| 2022-08-16 | CSTL | Sale | 2,973 | 31.46 | 93,545 |
| 2022-08-16 | CSTL | Sale | 36 | 32.83 | 1,181 |
| 2022-08-04 | CSTL | Sale | 8,350 | 30.85 | 257,605 |
| 2022-08-03 | CSTL | Sale | 100 | 30.03 | 3,002 |
| 2022-08-01 | CSTL | Sale | 8,700 | 27.44 | 238,719 |
| 2022-08-02 | CSTL | Sale | 259 | 27.12 | 7,024 |
| 2021-12-10 | CSTL | Option Ex | 5,363 | .00 | 0 |
| 2021-11-15 | CSTL | Option Ex | 16,406 | 2.36 | 38,718 |
| 2021-11-16 | CSTL | Option Ex | 15,409 | 3.72 | 57,321 |
| 2021-11-15 | CSTL | Sale | 16,406 | 52.76 | 865,547 |
| 2021-11-09 | CSTL | Sale | 2,500 | 57.18 | 142,940 |
| 2021-11-10 | CSTL | Sale | 1,200 | 56.46 | 67,748 |
| 2021-10-21 | CSTL | Sale | 2,500 | 63.44 | 158,602 |
| 2021-10-19 | CSTL | Sale | 2,500 | 67.00 | 167,502 |
| 2021-10-20 | CSTL | Sale | 2,500 | 65.55 | 163,865 |
| 2021-10-06 | CSTL | Sale | 2,500 | 63.81 | 159,537 |
| 2021-10-05 | CSTL | Sale | 2,500 | 62.43 | 156,067 |
| 2021-10-04 | CSTL | Sale | 2,500 | 61.60 | 153,997 |
| 2021-09-30 | CSTL | Sale | 12,500 | 65.98 | 824,712 |
| 2021-09-28 | CSTL | Sale | 12,500 | 67.25 | 840,574 |
| 2021-09-29 | CSTL | Sale | 12,500 | 66.02 | 825,200 |
| 2021-09-15 | CSTL | Sale | 15,000 | 74.14 | 1,112,175 |
| 2021-09-13 | CSTL | Sale | 15,000 | 72.76 | 1,091,340 |
| 2021-09-14 | CSTL | Sale | 11,667 | 75.01 | 875,153 |
| 2021-09-14 | CSTL | Sale | 3,333 | 75.03 | 250,074 |
| 2021-08-31 | CSTL | Sale | 15,000 | 75.52 | 1,132,755 |
| 2021-08-27 | CSTL | Sale | 15,000 | 74.28 | 1,114,230 |
| 2021-08-30 | CSTL | Sale | 15,000 | 75.20 | 1,127,940 |
| 2021-08-23 | CSTL | Sale | 7,500 | 70.57 | 529,297 |
| 2021-08-17 | CSTL | Sale | 8,010 | 59.30 | 475,033 |
| 2021-08-18 | CSTL | Sale | 4,490 | 61.13 | 274,473 |
| 2021-08-13 | CSTL | Sale | 12,500 | 65.21 | 815,112 |
| 2021-08-16 | CSTL | Sale | 12,500 | 61.60 | 770,025 |
| 2021-08-03 | CSTL | Sale | 4,020 | 70.35 | 282,807 |
| 2021-08-02 | CSTL | Sale | 1,369 | 70.26 | 96,185 |
| 2021-07-30 | CSTL | Sale | 2,111 | 70.17 | 148,128 |
| 2021-07-21 | CSTL | Sale | 12,500 | 67.62 | 845,250 |
| 2021-07-19 | CSTL | Sale | 12,500 | 64.70 | 808,700 |
| 2021-07-20 | CSTL | Sale | 12,500 | 66.21 | 827,575 |
| 2021-07-09 | CSTL | Sale | 10,000 | 72.11 | 721,060 |
| 2021-07-07 | CSTL | Sale | 10,000 | 70.50 | 705,030 |
| 2021-07-08 | CSTL | Sale | 10,000 | 69.17 | 691,740 |
| 2021-06-24 | CSTL | Sale | 10,000 | 75.12 | 751,200 |
| 2021-06-22 | CSTL | Sale | 10,000 | 74.56 | 745,600 |
| 2021-06-23 | CSTL | Sale | 10,000 | 75.36 | 753,550 |
| 2021-06-01 | CSTL | Sale | 2,438 | 59.45 | 144,931 |
| 2021-05-27 | CSTL | Sale | 4,034 | 58.62 | 236,465 |
| 2021-05-28 | CSTL | Sale | 9,497 | 60.76 | 577,018 |
| 2021-05-11 | CSTL | Sale | 3,333 | 53.08 | 176,915 |
| 2021-05-12 | CSTL | Sale | 3,333 | 52.41 | 174,669 |
| 2021-04-28 | CSTL | Sale | 14,374 | 68.49 | 984,460 |
| 2021-04-27 | CSTL | Sale | 14,374 | 71.05 | 1,021,301 |
| 2021-04-26 | CSTL | Sale | 14,374 | 69.23 | 995,183 |
| 2021-04-15 | CSTL | Sale | 14,374 | 68.80 | 988,888 |
| 2021-04-13 | CSTL | Sale | 14,374 | 68.05 | 978,121 |
| 2021-04-14 | CSTL | Sale | 14,374 | 70.47 | 1,012,978 |
| 2021-03-30 | CSTL | Sale | 16,874 | 59.68 | 1,007,040 |
| 2021-03-12 | CSTL | Sale | 14,375 | 65.22 | 937,595 |
| 2021-03-11 | CSTL | Sale | 14,375 | 67.76 | 974,064 |
| 2021-03-10 | CSTL | Sale | 14,375 | 64.85 | 932,233 |
| 2021-02-26 | CSTL | Sale | 14,375 | 74.23 | 1,067,085 |
| 2021-02-10 | CSTL | Sale | 14,375 | 97.82 | 1,406,220 |
| 2021-02-08 | CSTL | Sale | 14,375 | 95.04 | 1,366,243 |
| 2021-02-09 | CSTL | Sale | 14,375 | 96.05 | 1,380,761 |
| 2021-01-29 | CSTL | Sale | 14,375 | 67.35 | 968,113 |
| 2021-01-27 | CSTL | Sale | 14,377 | 66.42 | 954,920 |
| 2021-01-28 | CSTL | Sale | 14,375 | 68.14 | 979,526 |
| 2021-01-15 | CSTL | Sale | 14,377 | 75.68 | 1,088,051 |
| 2021-01-13 | CSTL | Sale | 14,377 | 73.61 | 1,058,276 |
| 2021-01-14 | CSTL | Sale | 14,377 | 76.15 | 1,094,851 |
| 2020-12-29 | CSTL | Sale | 15,000 | 68.83 | 1,032,479 |
| 2020-12-30 | CSTL | Sale | 15,000 | 69.03 | 1,035,390 |
| 2020-12-18 | CSTL | Sale | 6,250 | 63.61 | 397,562 |
| 2020-12-17 | CSTL | Sale | 6,250 | 66.07 | 412,918 |
| 2020-12-16 | CSTL | Sale | 6,250 | 66.25 | 414,037 |
| 2020-12-11 | CSTL | Sale | 15,000 | 60.21 | 903,165 |
| 2020-12-10 | CSTL | Sale | 15,000 | 58.08 | 871,230 |
| 2020-12-02 | CSTL | Sale | 6,250 | 50.20 | 313,737 |
| 2020-12-03 | CSTL | Sale | 6,250 | 51.21 | 320,056 |
| 2020-12-04 | CSTL | Sale | 6,250 | 51.75 | 323,462 |
| 2020-11-18 | CSTL | Sale | 6,250 | 47.38 | 296,125 |
| 2020-11-17 | CSTL | Sale | 6,250 | 49.35 | 308,450 |
| 2020-11-16 | CSTL | Sale | 6,250 | 50.55 | 315,925 |
| 2020-11-09 | CSTL | Sale | 4,050 | 49.49 | 200,450 |
| 2020-11-10 | CSTL | Sale | 7,352 | 48.27 | 354,866 |
| 2020-11-03 | CSTL | Sale | 6,250 | 47.38 | 296,137 |
| 2020-11-04 | CSTL | Sale | 6,250 | 49.75 | 310,918 |
| 2020-11-05 | CSTL | Sale | 6,250 | 51.85 | 324,043 |
| 2020-10-28 | CSTL | Sale | 1,200 | 49.71 | 59,652 |
| 2020-10-29 | CSTL | Sale | 1,100 | 48.11 | 52,923 |
| 2020-10-20 | CSTL | Sale | 1,000 | 49.85 | 49,848 |
| 2020-10-21 | CSTL | Sale | 1,200 | 48.10 | 57,722 |
| 2020-10-01 | CSTL | Sale | 12,640 | 51.78 | 654,461 |
| 2020-10-02 | CSTL | Sale | 6,000 | 51.93 | 311,574 |
| 2020-09-23 | CSTL | Sale | 6,000 | 51.43 | 308,556 |
| 2020-09-22 | CSTL | Sale | 36,160 | 51.52 | 1,863,071 |
| 2020-09-11 | CSTL | Sale | 12,776 | 49.22 | 628,809 |
| 2020-09-10 | CSTL | Sale | 41,924 | 49.61 | 2,079,891 |
| 2020-08-17 | CSTL | Sale | 8,500 | 42.55 | 361,709 |
| 2020-08-18 | CSTL | Sale | 11,000 | 43.34 | 476,707 |
| 2020-08-13 | CSTL | Sale | 8,500 | 41.19 | 350,149 |
| 2020-08-12 | CSTL | Sale | 5,000 | 41.10 | 205,500 |
| 2020-08-12 | CSTL | Sale | 5,000 | 41.10 | 205,500 |
| 2020-08-13 | CSTL | Sale | 8,500 | 41.19 | 350,149 |
| 2020-08-05 | CSTL | Sale | 5,000 | 41.67 | 208,359 |
| 2020-08-06 | CSTL | Sale | 8,500 | 41.52 | 352,945 |
| 2020-07-21 | CSTL | Sale | 7,000 | 41.89 | 293,202 |
| 2020-07-22 | CSTL | Sale | 5,000 | 39.59 | 197,950 |
| 2020-07-15 | CSTL | Sale | 5,000 | 44.59 | 222,925 |
| 2020-07-14 | CSTL | Sale | 23,000 | 41.91 | 963,976 |
| 2020-06-09 | CSTL | Sale | 5,000 | 38.01 | 190,025 |
| 2020-05-27 | CSTL | Sale | 5,000 | 37.05 | 185,250 |
| 2020-05-22 | CSTL | Sale | 5,000 | 37.18 | 185,900 |
| 2020-05-14 | CSTL | Sale | 10,000 | 32.58 | 325,800 |
| 2020-05-12 | CSTL | Option Ex | 65,627 | 1.92 | 126,003 |
Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Maetzold Derek J (Pres. & Chief Exec. Officer of Castle Biosciences Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.