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Insider Trading activities at Castle Biosciences Inc (CSTL) , Part 4

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: $337,126,032.
Total stock option exercises since 2019: $1,084,948.


 1   2   3   4 
19 insiders reported insider trading activities at Castle Biosciences Inc (CSTL):
▪ Insider trading activities of Cook Joseph C. Iii
▪ Insider trading activities of Kong Garheng
▪ Insider trading activities of Goldberg Ellen
▪ Insider trading activities of Mgc Venture Partners Qp 2018, L.p.
▪ Insider trading activities of Bradbury Daniel
▪ Insider trading activities of Aspinall Mara G.
▪ Insider trading activities of Kabakoff David S
▪ Insider trading activities of Oelschlager Kristen M
▪ Insider trading activities of Monzon Federico A.
▪ Insider trading activities of Stokes Frank
▪ Insider trading activities of Harrison Miles
▪ Insider trading activities of Caple Kim
▪ Insider trading activities of Cole G Bradley
▪ Insider trading activities of S96s Bernhard E.
▪ Insider trading activities of Juvenal Tobin W
▪ Insider trading activities of Anderson Bonnie H
▪ Insider trading activities of Cotton Rodney
▪ Insider trading activities of Olson Tiffany
▪ Insider trading activities of Maetzold Derek J

Table 1. Yearly summary of insider stock purchases, sales, and option exercises at Castle Biosciences Inc (CSTL).
Insider Buying Insider Sales Option Exercises
Year Shares Value Shares Value Shares Value
2025 0 $0 292,004 $7,468,998 344,959 $15,862
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


Table 3. Detailed insider trading at Castle Biosciences Inc (CSTL) , Part 4
  Trade Date   Insider Name Trade Type     Shares       Price ($)   Value ($)
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
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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.



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