Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Castle Biosciences Inc (CSTL) since 2019 are shown in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Castle Biosciences Inc. (See page 1 of this report.) Table 2 shows the detailed insider transactions. This company's CIK number is 1447362.
Total stock buying since 2019: $12,499,089.
Total stock sales since 2019: $334,093,908.
Total stock option exercises since 2019: $1,069,086.
| Insider Buying | Insider Sales | Option Exercises | ||||
|---|---|---|---|---|---|---|
| Year | Shares | Value | Shares | Value | Shares | Value |
| 2025 | 0 | $0 | 202,459 | $4,436,874 | 226,299 | $0 |
| 2024 | 0 | $0 | 307,152 | $7,835,081 | 202,771 | $55,322 |
| 2023 | 4,800 | $68,400 | 463,926 | $10,041,582 | 175,762 | $62,459 |
| 2022 | 1,320 | $24,769 | 274,891 | $9,070,952 | 97,601 | $94,236 |
| 2021 | 0 | $0 | 1,290,912 | $157,962,142 | 120,797 | $437,599 |
| 2020 | 0 | $0 | 3,227,426 | $144,746,989 | 197,860 | $419,470 |
| 2019 | 775,370 | $12,405,920 | 18 | $288 | 0 | $0 |
| Trade Date | Insider Name | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2021-06-15 | Stokes Frank (Chief Financial Officer) | Option Ex | 11,600 | 2.39 | 27,724 |
| 2021-06-08 | Spiess Bernhard E. (Chief Business Officer) | Sale | 8,989 | 70.00 | 629,230 |
| 2021-06-08 | Spiess Bernhard E. (Chief Business Officer) | Option Ex | 8,989 | 1.92 | 17,258 |
| 2021-06-01 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 2,438 | 59.45 | 144,931 |
| 2021-05-28 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 9,497 | 60.76 | 577,018 |
| 2021-05-27 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 4,034 | 58.62 | 236,465 |
| 2021-05-12 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 3,333 | 52.41 | 174,669 |
| 2021-05-11 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 3,333 | 53.08 | 176,915 |
| 2021-04-28 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,374 | 68.49 | 984,460 |
| 2021-04-27 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,374 | 71.05 | 1,021,301 |
| 2021-04-26 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,374 | 69.23 | 995,183 |
| 2021-04-22 | Bradbury Daniel | Sale | 7,500 | 64.67 | 485,047 |
| 2021-04-21 | Bradbury Daniel | Sale | 7,500 | 61.46 | 460,927 |
| 2021-04-15 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,374 | 68.80 | 988,888 |
| 2021-04-14 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,374 | 70.47 | 1,012,978 |
| 2021-04-13 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,374 | 68.05 | 978,121 |
| 2021-04-07 | Bradbury Daniel | Sale | 7,500 | 72.23 | 541,710 |
| 2021-04-06 | Bradbury Daniel | Sale | 7,500 | 73.80 | 553,500 |
| 2021-04-06 | Kabakoff David S | Sale | 40,000 | 73.99 | 2,959,720 |
| 2021-04-05 | Kabakoff David S | Sale | 70,000 | 72.51 | 5,075,490 |
| 2021-04-01 | Kabakoff David S | Sale | 60,000 | 70.40 | 4,224,120 |
| 2021-03-31 | Kabakoff David S | Sale | 30,000 | 67.86 | 2,035,769 |
| 2021-03-30 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 16,874 | 59.68 | 1,007,040 |
| 2021-03-25 | Bradbury Daniel | Sale | 7,500 | 61.18 | 458,835 |
| 2021-03-24 | Bradbury Daniel | Sale | 7,500 | 63.12 | 473,392 |
| 2021-03-22 | Kabakoff David S | Sale | 10,000 | 67.12 | 671,210 |
| 2021-03-19 | Kabakoff David S | Sale | 10,000 | 66.17 | 661,700 |
| 2021-03-18 | Cook Joseph C. Iii | Option Ex | 12,229 | 16.00 | 195,664 |
| 2021-03-17 | Kabakoff David S | Sale | 10,000 | 66.14 | 661,370 |
| 2021-03-16 | Kabakoff David S | Sale | 120,000 | 63.83 | 7,659,720 |
| 2021-03-12 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,375 | 65.22 | 937,595 |
| 2021-03-11 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,375 | 67.76 | 974,064 |
| 2021-03-10 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,375 | 64.85 | 932,233 |
| 2021-03-09 | Bradbury Daniel | Sale | 7,500 | 9,036.17 | 67,771,312 |
| 2021-03-08 | Bradbury Daniel | Sale | 7,500 | 67.50 | 506,242 |
| 2021-02-26 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,375 | 74.23 | 1,067,085 |
| 2021-02-10 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,375 | 97.82 | 1,406,220 |
| 2021-02-10 | Bradbury Daniel | Sale | 6,500 | 96.25 | 625,644 |
| 2021-02-09 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,375 | 96.05 | 1,380,761 |
| 2021-02-09 | Bradbury Daniel | Sale | 8,500 | 96.92 | 823,854 |
| 2021-02-08 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,375 | 95.04 | 1,366,243 |
| 2021-01-29 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,375 | 67.35 | 968,113 |
| 2021-01-28 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,375 | 68.14 | 979,526 |
| 2021-01-27 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,377 | 66.42 | 954,920 |
| 2021-01-26 | Bradbury Daniel | Sale | 7,500 | 73.01 | 547,545 |
| 2021-01-25 | Bradbury Daniel | Sale | 7,500 | 77.87 | 584,032 |
| 2021-01-15 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,377 | 75.68 | 1,088,051 |
| 2021-01-14 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,377 | 76.15 | 1,094,851 |
| 2021-01-13 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 14,377 | 73.61 | 1,058,276 |
| 2021-01-13 | Bradbury Daniel | Sale | 7,500 | 73.29 | 549,660 |
| 2021-01-12 | Stokes Frank (Chief Financial Officer) | Sale | 7,500 | 78.10 | 585,750 |
| 2021-01-12 | Stokes Frank (Chief Financial Officer) | Option Ex | 7,500 | 2.39 | 17,925 |
| 2021-01-12 | Bradbury Daniel | Sale | 12,113 | 78.28 | 948,205 |
| 2021-01-11 | Stokes Frank (Chief Financial Officer) | Sale | 7,500 | 78.26 | 586,942 |
| 2021-01-11 | Stokes Frank (Chief Financial Officer) | Option Ex | 7,500 | 2.39 | 17,925 |
| 2020-12-30 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 15,000 | 69.03 | 1,035,390 |
| 2020-12-29 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 15,000 | 68.83 | 1,032,479 |
| 2020-12-29 | Bradbury Daniel | Sale | 15,000 | 69.35 | 1,040,220 |
| 2020-12-28 | Bradbury Daniel | Sale | 15,000 | 72.75 | 1,091,310 |
| 2020-12-18 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 6,250 | 63.61 | 397,562 |
| 2020-12-17 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 6,250 | 66.07 | 412,918 |
| 2020-12-16 | Cook Joseph C. Iii | Sale | 169,900 | 66.52 | 11,301,238 |
| 2020-12-16 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 6,250 | 66.25 | 414,037 |
| 2020-12-11 | Cook Joseph C. Iii | Sale | 24,659 | 60.82 | 1,499,661 |
| 2020-12-11 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 15,000 | 60.21 | 903,165 |
| 2020-12-11 | Bradbury Daniel | Sale | 6,637 | 60.30 | 400,204 |
| 2020-12-10 | Cook Joseph C. Iii | Sale | 45,441 | 59.20 | 2,689,970 |
| 2020-12-10 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 15,000 | 58.08 | 871,230 |
| 2020-12-10 | Bradbury Daniel | Sale | 3,750 | 58.42 | 219,060 |
| 2020-12-09 | Cook Joseph C. Iii | Sale | 32,824 | 57.36 | 1,882,686 |
| 2020-12-08 | Cook Joseph C. Iii | Sale | 44,576 | 56.17 | 2,504,012 |
| 2020-12-07 | Cook Joseph C. Iii | Sale | 2,600 | 55.84 | 145,184 |
| 2020-12-04 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 6,250 | 51.75 | 323,462 |
| 2020-12-03 | Stokes Frank (Chief Financial Officer) | Option Ex | 2,000 | 3.38 | 6,760 |
| 2020-12-03 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 6,250 | 51.21 | 320,056 |
| 2020-12-02 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 6,250 | 50.20 | 313,737 |
| 2020-12-01 | Spiess Bernhard E. (Chief Business Officer) | Sale | 40,000 | 49.97 | 1,998,800 |
| 2020-11-19 | Bradbury Daniel | Sale | 3,750 | 46.21 | 173,276 |
| 2020-11-18 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 6,250 | 47.38 | 296,125 |
| 2020-11-18 | Bradbury Daniel | Sale | 3,750 | 47.38 | 177,686 |
| 2020-11-17 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 6,250 | 49.35 | 308,450 |
| 2020-11-16 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 6,250 | 50.55 | 315,925 |
| 2020-11-13 | Stokes Frank (Chief Financial Officer) | Sale | 13,000 | 51.25 | 666,250 |
| 2020-11-13 | Stokes Frank (Chief Financial Officer) | Option Ex | 13,000 | 2.39 | 31,070 |
| 2020-11-12 | Stokes Frank (Chief Financial Officer) | Sale | 13,000 | 51.64 | 671,294 |
| 2020-11-12 | Stokes Frank (Chief Financial Officer) | Option Ex | 13,000 | 2.39 | 31,070 |
| 2020-11-10 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 7,352 | 48.27 | 354,866 |
| 2020-11-09 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 4,050 | 49.49 | 200,450 |
| 2020-11-05 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 6,250 | 51.85 | 324,043 |
| 2020-11-05 | Bradbury Daniel | Sale | 3,750 | 51.81 | 194,276 |
| 2020-11-04 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 6,250 | 49.75 | 310,918 |
| 2020-11-04 | Bradbury Daniel | Sale | 3,750 | 49.77 | 186,656 |
| 2020-11-03 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 6,250 | 47.38 | 296,137 |
| 2020-10-29 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 1,100 | 48.11 | 52,923 |
| 2020-10-28 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 1,200 | 49.71 | 59,652 |
| 2020-10-21 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 1,200 | 48.10 | 57,722 |
| 2020-10-21 | Bradbury Daniel | Sale | 5,250 | 48.12 | 252,656 |
| 2020-10-20 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 1,000 | 49.85 | 49,848 |
| 2020-10-20 | Bradbury Daniel | Sale | 11,750 | 49.90 | 586,266 |
| 2020-10-14 | Cook Joseph C. Iii | Sale | 6,475 | 54.82 | 354,978 |
| 2020-10-14 | Stokes Frank (Chief Financial Officer) | Sale | 13,000 | 54.26 | 705,367 |
| 2020-10-14 | Stokes Frank (Chief Financial Officer) | Option Ex | 13,000 | 2.39 | 31,070 |
| 2020-10-13 | Cook Joseph C. Iii | Sale | 23,849 | 54.91 | 1,309,548 |
| 2020-10-13 | Stokes Frank (Chief Financial Officer) | Sale | 13,000 | 54.79 | 712,283 |
| 2020-10-13 | Stokes Frank (Chief Financial Officer) | Option Ex | 13,000 | 2.39 | 31,070 |
| 2020-10-12 | Cook Joseph C. Iii | Sale | 19,676 | 54.84 | 1,079,051 |
| 2020-10-09 | Bradbury Daniel | Sale | 15,000 | 54.77 | 821,565 |
| 2020-10-09 | Kabakoff David S | Sale | 25,000 | 54.16 | 1,354,075 |
| 2020-10-08 | Bradbury Daniel | Sale | 15,000 | 54.21 | 813,135 |
| 2020-10-08 | Kabakoff David S | Sale | 25,000 | 54.23 | 1,355,775 |
| 2020-10-06 | Kabakoff David S | Sale | 50,000 | 53.09 | 2,654,650 |
| 2020-10-05 | Kabakoff David S | Sale | 25,000 | 52.09 | 1,302,250 |
| 2020-10-02 | Aspinall Mara G. | Sale | 2,500 | 52.48 | 131,200 |
| 2020-10-02 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 6,000 | 51.93 | 311,574 |
| 2020-10-02 | Kabakoff David S | Sale | 25,000 | 52.07 | 1,301,675 |
| 2020-10-01 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 12,640 | 51.78 | 654,461 |
| 2020-09-23 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 6,000 | 51.43 | 308,556 |
| 2020-09-22 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 36,160 | 51.52 | 1,863,071 |
| 2020-09-17 | Bradbury Daniel | Sale | 3,750 | 48.47 | 181,766 |
| 2020-09-16 | Bradbury Daniel | Sale | 3,750 | 48.30 | 181,128 |
| 2020-09-15 | Stokes Frank (Chief Financial Officer) | Sale | 13,000 | 48.97 | 636,623 |
| 2020-09-15 | Stokes Frank (Chief Financial Officer) | Option Ex | 13,000 | 2.39 | 31,070 |
| 2020-09-14 | Stokes Frank (Chief Financial Officer) | Sale | 13,000 | 49.98 | 649,779 |
| 2020-09-14 | Stokes Frank (Chief Financial Officer) | Option Ex | 13,000 | 2.39 | 31,070 |
| 2020-09-11 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 12,776 | 49.22 | 628,809 |
| 2020-09-10 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 41,924 | 49.61 | 2,079,891 |
| 2020-09-09 | Cook Joseph C. Iii | Sale | 5,994 | 50.32 | 301,636 |
| 2020-09-09 | Spiess Bernhard E. (Chief Business Officer) | Sale | 15,000 | 49.80 | 747,000 |
| 2020-09-09 | Aspinall Mara G. | Sale | 2,500 | 50.48 | 126,199 |
| 2020-09-08 | Cook Joseph C. Iii | Sale | 69,265 | 47.76 | 3,307,957 |
| 2020-09-08 | Spiess Bernhard E. (Chief Business Officer) | Sale | 14,888 | 49.00 | 729,512 |
| 2020-09-04 | Cook Joseph C. Iii | Sale | 61,838 | 47.22 | 2,920,237 |
| 2020-09-04 | Spiess Bernhard E. (Chief Business Officer) | Sale | 25,112 | 48.00 | 1,205,376 |
| 2020-09-04 | Aspinall Mara G. | Sale | 2,500 | 48.48 | 121,199 |
| 2020-09-03 | Cook Joseph C. Iii | Sale | 30,200 | 46.06 | 1,391,102 |
| 2020-09-03 | Kabakoff David S | Sale | 25,000 | 46.05 | 1,151,325 |
| 2020-09-02 | Cook Joseph C. Iii | Sale | 7,365 | 46.01 | 338,863 |
| 2020-09-02 | Bradbury Daniel | Sale | 3,750 | 45.69 | 171,337 |
| 2020-09-01 | Cook Joseph C. Iii | Sale | 40,310 | 46.00 | 1,854,260 |
| 2020-09-01 | Bradbury Daniel | Sale | 3,750 | 45.88 | 172,050 |
| 2020-08-31 | Cook Joseph C. Iii | Sale | 8,228 | 45.84 | 377,171 |
| 2020-08-28 | Cook Joseph C. Iii | Sale | 55,701 | 46.12 | 2,569,097 |
| 2020-08-28 | Aspinall Mara G. | Sale | 2,500 | 46.48 | 116,199 |
| 2020-08-27 | Cook Joseph C. Iii | Sale | 16,239 | 45.89 | 745,207 |
| 2020-08-24 | Cook Joseph C. Iii | Sale | 8,877 | 45.90 | 407,454 |
| 2020-08-21 | Cook Joseph C. Iii | Sale | 6,017 | 45.85 | 275,879 |
| 2020-08-20 | Cook Joseph C. Iii | Sale | 8,795 | 45.98 | 404,367 |
| 2020-08-19 | Cook Joseph C. Iii | Sale | 8,574 | 45.83 | 392,946 |
| 2020-08-19 | Spiess Bernhard E. (Chief Business Officer) | Sale | 20,000 | 45.00 | 900,000 |
| 2020-08-19 | Bradbury Daniel | Sale | 3,750 | 44.98 | 168,675 |
| 2020-08-19 | Kabakoff David S | Sale | 75,000 | 44.78 | 3,358,500 |
| 2020-08-18 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 11,000 | 43.34 | 476,707 |
| 2020-08-18 | Bradbury Daniel | Sale | 3,750 | 43.18 | 161,925 |
| 2020-08-17 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 8,500 | 42.55 | 361,709 |
| 2020-08-13 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 17,000 | 41.19 | 700,298 |
| 2020-08-12 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 10,000 | 41.10 | 411,000 |
| 2020-08-10 | Kabakoff David S | Sale | 25,000 | 42.01 | 1,050,300 |
| 2020-08-07 | Bradbury Daniel | Sale | 3,750 | 41.60 | 155,992 |
| 2020-08-06 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 8,500 | 41.52 | 352,945 |
| 2020-08-06 | Bradbury Daniel | Sale | 3,750 | 41.60 | 156,007 |
| 2020-08-05 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 5,000 | 41.67 | 208,359 |
| 2020-07-22 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 5,000 | 39.59 | 197,950 |
| 2020-07-22 | Bradbury Daniel | Sale | 3,750 | 39.64 | 148,650 |
| 2020-07-21 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 7,000 | 41.89 | 293,202 |
| 2020-07-21 | Bradbury Daniel | Sale | 3,750 | 42.06 | 157,725 |
| 2020-07-17 | Anderson Bonnie H | Sale | 3,000 | 43.99 | 131,961 |
| 2020-07-17 | Kabakoff David S | Sale | 25,000 | 43.04 | 1,075,900 |
| 2020-07-15 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 5,000 | 44.59 | 222,925 |
| 2020-07-14 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 23,000 | 41.91 | 963,976 |
| 2020-07-09 | Cook Joseph C. Iii | Sale | 62,990 | 43.36 | 2,731,435 |
| 2020-07-09 | Kabakoff David S | Sale | 50,000 | 43.60 | 2,180,200 |
| 2020-07-08 | Bradbury Daniel | Sale | 3,750 | 41.60 | 155,985 |
| 2020-07-07 | Bradbury Daniel | Sale | 3,750 | 40.55 | 152,077 |
| 2020-06-24 | Cook Joseph C. Iii | Sale | 100 | 43.11 | 4,311 |
| 2020-06-23 | Cook Joseph C. Iii | Sale | 25,336 | 43.07 | 1,091,297 |
| 2020-06-23 | Kabakoff David S | Sale | 25,000 | 42.13 | 1,053,375 |
| 2020-06-22 | Kabakoff David S | Sale | 175,000 | 40.81 | 7,141,400 |
| 2020-06-19 | Cook Joseph C. Iii | Sale | 27,353 | 43.53 | 1,190,648 |
| 2020-06-19 | Bradbury Daniel | Sale | 3,750 | 43.00 | 161,250 |
| 2020-06-18 | Cook Joseph C. Iii | Sale | 61,466 | 42.38 | 2,604,990 |
| 2020-06-18 | Bradbury Daniel | Sale | 3,750 | 41.24 | 154,650 |
| 2020-06-17 | Cook Joseph C. Iii | Sale | 12,478 | 39.12 | 488,151 |
| 2020-06-16 | Cook Joseph C. Iii | Sale | 2,750 | 39.04 | 107,360 |
| 2020-06-15 | Cook Joseph C. Iii | Sale | 22,195 | 40.26 | 893,504 |
| 2020-06-15 | Anderson Bonnie H | Sale | 6,000 | 40.00 | 240,000 |
| 2020-06-10 | Cook Joseph C. Iii | Sale | 2,108 | 39.00 | 82,212 |
| 2020-06-09 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 5,000 | 38.01 | 190,025 |
| 2020-06-04 | Bradbury Daniel | Sale | 3,750 | 37.55 | 140,808 |
| 2020-06-03 | Bradbury Daniel | Sale | 3,750 | 37.58 | 140,925 |
| 2020-06-02 | Cook Joseph C. Iii | Sale | 4,362 | 39.01 | 170,161 |
| 2020-06-02 | Spiess Bernhard E. (Chief Business Officer) | Sale | 32,233 | 38.56 | 1,242,904 |
| 2020-06-01 | Cook Joseph C. Iii | Sale | 371 | 39.06 | 14,491 |
| 2020-05-28 | Cook Joseph C. Iii | Sale | 15,520 | 38.62 | 599,335 |
| 2020-05-27 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 5,000 | 37.05 | 185,250 |
| 2020-05-22 | Cook Joseph C. Iii | Sale | 11,196 | 37.73 | 422,425 |
| 2020-05-22 | Monzon Federico A. (Chief Medical Officer) | Option Ex | 20,000 | 1.92 | 38,400 |
| 2020-05-22 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 5,000 | 37.18 | 185,900 |
| 2020-05-21 | Cook Joseph C. Iii | Sale | 11,422 | 37.84 | 432,151 |
| 2020-05-21 | Bradbury Daniel | Sale | 3,750 | 37.16 | 139,331 |
| 2020-05-20 | Cook Joseph C. Iii | Sale | 10,084 | 37.10 | 374,116 |
| 2020-05-20 | Bradbury Daniel | Sale | 11,250 | 37.04 | 416,744 |
| 2020-05-19 | Cook Joseph C. Iii | Sale | 900 | 37.03 | 33,327 |
| 2020-05-18 | Cook Joseph C. Iii | Sale | 10,200 | 38.35 | 391,170 |
| 2020-05-15 | Cook Joseph C. Iii | Sale | 21,916 | 36.84 | 807,275 |
| 2020-05-15 | Mgc Venture Partners Qp 2018, L.p. (10% Owner) | Sale | 21,916 | 36.84 | 807,275 |
| 2020-05-14 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Sale | 10,000 | 32.58 | 325,800 |
| 2020-05-13 | Cook Joseph C. Iii | Sale | 1,131 | 36.08 | 40,806 |
| 2020-05-13 | Mgc Venture Partners Qp 2018, L.p. (10% Owner) | Sale | 1,131 | 36.08 | 40,806 |
| 2020-05-12 | Cook Joseph C. Iii | Sale | 9,788 | 37.03 | 362,498 |
| 2020-05-12 | Mgc Venture Partners Qp 2018, L.p. (10% Owner) | Sale | 9,788 | 37.03 | 362,498 |
| 2020-05-12 | Anderson Bonnie H | Sale | 4,000 | 35.00 | 140,000 |
| 2020-05-12 | Kong Garheng | Sale | 250,000 | 34.50 | 8,624,500 |
| 2020-05-12 | Maetzold Derek J (Pres. & Chief Exec. Officer) | Option Ex | 65,627 | 1.92 | 126,003 |
| 2020-05-12 | Kabakoff David S | Sale | 250,000 | 34.26 | 8,563,750 |
| 2020-05-08 | Spiess Bernhard E. (Chief Business Officer) | Option Ex | 32,233 | 1.92 | 61,887 |
| 2020-04-30 | Anderson Bonnie H | Sale | 3,000 | 30.59 | 91,785 |
| 2020-02-19 | Kong Garheng | Sale | 25,000 | 32.03 | 800,750 |
| 2020-02-19 | Kabakoff David S | Sale | 25,000 | 32.03 | 800,750 |
| 2020-02-13 | Kong Garheng | Sale | 25,000 | 32.01 | 800,250 |
| 2020-02-13 | Kabakoff David S | Sale | 25,000 | 32.01 | 800,250 |
| 2020-02-06 | Kong Garheng | Sale | 25,000 | 31.03 | 775,750 |
| 2020-02-06 | Kabakoff David S | Sale | 25,000 | 31.03 | 775,750 |
| 2020-02-03 | Kong Garheng | Sale | 25,000 | 31.06 | 776,525 |
| 2020-02-03 | Kabakoff David S | Sale | 25,000 | 31.06 | 776,525 |
| 2020-01-31 | Kong Garheng | Sale | 25,000 | 30.02 | 750,400 |
| 2020-01-31 | Kabakoff David S | Sale | 25,000 | 30.02 | 750,400 |
| 2020-01-28 | Kong Garheng | Sale | 25,000 | 30.02 | 750,500 |
| 2020-01-28 | Kabakoff David S | Sale | 25,000 | 30.02 | 750,500 |
| 2019-07-29 | Cook Joseph C. Iii (Director) | Buy | 334,745 | 16.00 | 5,355,920 |
| 2019-07-29 | Mgc Venture Partners Qp 2018, L.p. | Buy | 312,500 | 16.00 | 5,000,000 |
| 2019-07-29 | Aspinall Mara G. (Director) | Buy | 3,125 | 16.00 | 50,000 |
| 2019-07-29 | Kong Garheng | Buy | 62,500 | 16.00 | 1,000,000 |
| 2019-07-29 | Kong Garheng | Sale | 9 | 16.00 | 144 |
| 2019-07-29 | Kabakoff David S (Director) | Buy | 62,500 | 16.00 | 1,000,000 |
| 2019-07-29 | Kabakoff David S (Director) | Sale | 9 | 16.00 | 144 |
Insider trading activities including stock purchases, stock sales, and option exercises of CSTL listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Castle Biosciences Inc (symbol CSTL, CIK number 1447362) see the Securities and Exchange Commission (SEC) website.