MAETZOLD DEREK J

CSTL

MAETZOLD DEREK J serves as director, officer: Pres. & Chief Exec. Officer at Castle Biosciences, Inc. (CSTL). This page tracks their complete SEC Form 4 insider trading history including stock purchases and sales.

Total Buys

0 trades

$0.00

Total Sells

143 trades

$63.00M

Net Position

Net Seller

$63.00M

Companies Traded

CSTL

Active Period

Feb 2021 – Mar 2026

143 total trades

Most Recent

Sell CSTL

Mar 13, 2026 · $1.11M

MAETZOLD DEREK J's Insider Trading at Castle Biosciences, Inc. (CSTL)

Buys

0 · $0.00

Sells

143 · $63.00M

Total Shares Bought

Total Shares Sold

1,480,118

CSTL Price Chart

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Date	Type	Shares	Avg Price	Value	Shares After
Mar 13, 2026↗	Sell	43,285	$25.66	$1.11M	94,737
Feb 5, 2026↗	Sell	4,017	$39.52	$158.8K	84,515
Feb 3, 2026↗	Sell	4,017	$39.52	$158.8K	0
Jan 22, 2026↗	Sell	4,017	$40.01	$160.7K	87,715
Jan 20, 2026↗	Sell	4,017	$40.01	$160.7K	0
Jan 7, 2026↗	Sell	4,017	$38.76	$155.7K	30,852
Jan 5, 2026↗	Sell	4,017	$38.76	$155.7K	0
Dec 22, 2025↗	Sell	830	$40.35	$33.5K	0
Dec 17, 2025↗	Sell	509	$40.04	$20.4K	0
Dec 15, 2025↗	Sell	32,346	$38.69	$1.25M	0
Dec 9, 2025↗	Sell	19,251	$38.18	$735.0K	0
Dec 4, 2025↗	Sell	1,339	$40.03	$53.6K	0
Dec 2, 2025↗	Sell	2,678	$39.23	$105.1K	0
Nov 26, 2025↗	Sell	4,258	$40.09	$170.7K	0
Nov 25, 2025↗	Sell	5,115	$40.05	$204.9K	0
Nov 18, 2025↗	Sell	2,678	$34.02	$91.1K	0
Nov 4, 2025↗	Sell	9,373	$30.84	$289.1K	0
Oct 20, 2025↗	Sell	1,339	$22.44	$30.0K	0
Oct 2, 2025↗	Sell	1,339	$22.58	$30.2K	0
Sep 17, 2025↗	Sell	1,339	$21.97	$29.4K	0
Sep 2, 2025↗	Sell	1,339	$23.93	$32.0K	0
Aug 15, 2025↗	Sell	1,339	$20.04	$26.8K	0
Aug 13, 2025↗	Sell	43,019	$19.50	$839.0K	0
Aug 8, 2025↗	Sell	23,972	$19.36	$464.1K	0
Jun 27, 2025↗	Sell	22,576	$20.30	$458.3K	0
Apr 21, 2025↗	Sell	5,644	$21.52	$121.4K	0
Apr 8, 2025↗	Sell	5,644	$20.19	$113.9K	0
Mar 26, 2025↗	Sell	5,644	$20.30	$114.6K	0
Mar 7, 2025↗	Sell	29,177	$20.07	$585.7K	0
Mar 4, 2025↗	Sell	13,263	$21.64	$287.0K	0
Jan 13, 2025↗	Sell	2,565	$28.03	$71.9K	0
Jan 6, 2025↗	Sell	7,689	$29.66	$228.1K	0
Dec 17, 2024↗	Sell	9,364	$28.34	$265.4K	0
Dec 13, 2024↗	Sell	26,123	$28.72	$750.3K	0
Dec 9, 2024↗	Sell	21,361	$30.42	$649.8K	0
Dec 5, 2024↗	Sell	5,127	$31.35	$160.7K	0
Nov 12, 2024↗	Sell	5,127	$34.15	$175.1K	0
Nov 4, 2024↗	Sell	5,127	$32.54	$166.8K	0
Oct 14, 2024↗	Sell	5,127	$32.27	$165.5K	0
Oct 8, 2024↗	Sell	2,562	$30.27	$77.5K	0
Oct 4, 2024↗	Sell	2,565	$28.73	$73.7K	0
Sep 16, 2024↗	Sell	5,127	$30.97	$158.8K	0
Sep 11, 2024↗	Sell	2,616	$30.32	$79.3K	0
Sep 9, 2024↗	Sell	2,586	$29.46	$76.2K	0
Sep 3, 2024↗	Sell	1,914	$30.04	$57.5K	0
Aug 29, 2024↗	Sell	4,441	$30.08	$133.6K	0
Aug 23, 2024↗	Sell	2,987	$30.09	$89.9K	0
Aug 9, 2024↗	Sell	21,828	$26.83	$585.6K	0
Jun 3, 2024↗	Sell	6,336	$23.40	$148.3K	0
May 14, 2024↗	Sell	6,336	$24.27	$153.8K	0
May 6, 2024↗	Sell	6,336	$24.72	$156.6K	0
Apr 23, 2024↗	Sell	1,126	$20.11	$22.6K	0
Apr 12, 2024↗	Sell	5,210	$20.35	$106.0K	0
Apr 3, 2024↗	Sell	6,336	$21.70	$137.5K	0
Mar 20, 2024↗	Sell	6,336	$20.28	$128.5K	0
Mar 7, 2024↗	Sell	6,368	$20.77	$132.3K	0
Mar 4, 2024↗	Sell	4,131	$21.41	$88.5K	0
Dec 27, 2023↗	Sell	13,724	$21.99	$301.8K	0
Dec 22, 2023↗	Sell	11,869	$21.95	$260.5K	0
Dec 20, 2023↗	Sell	18,482	$21.29	$393.4K	0
Dec 18, 2023↗	Sell	16,251	$20.59	$334.5K	0
Dec 14, 2023↗	Sell	23,950	$20.75	$497.0K	0
Dec 12, 2023↗	Sell	8,432	$20.19	$170.3K	0
Dec 8, 2023↗	Sell	22,814	$20.16	$459.8K	0
Dec 6, 2023↗	Sell	100	$20.02	$2.0K	0
Dec 1, 2023↗	Sell	9,644	$20.07	$193.5K	0
Nov 29, 2023↗	Sell	21,429	$20.10	$430.8K	0
Nov 24, 2023↗	Sell	600	$20.03	$12.0K	0
Nov 20, 2023↗	Sell	5,610	$20.03	$112.4K	0
Sep 1, 2023↗	Sell	1,500	$20.05	$30.1K	0
Aug 30, 2023↗	Sell	11,955	$20.05	$239.7K	0
Aug 3, 2023↗	Sell	600	$20.10	$12.1K	0
Jul 7, 2023↗	Sell	25,116	$20.04	$503.4K	0
May 15, 2023↗	Sell	8,372	$23.17	$193.9K	0
May 4, 2023↗	Sell	8,372	$21.64	$181.1K	0
Apr 12, 2023↗	Sell	8,372	$22.65	$189.7K	0
Apr 3, 2023↗	Sell	8,372	$22.14	$185.4K	0
Mar 14, 2023↗	Sell	8,372	$20.95	$175.4K	0
Mar 6, 2023↗	Sell	8,372	$24.71	$206.9K	0
Feb 10, 2023↗	Sell	8,372	$26.18	$219.2K	0
Feb 1, 2023↗	Sell	8,384	$27.11	$227.3K	0
Jan 3, 2023↗	Sell	8,958	$22.90	$205.1K	0
Dec 19, 2022↗	Sell	8,958	$23.07	$206.7K	0
Dec 9, 2022↗	Sell	6,315	$22.32	$141.0K	0
Dec 5, 2022↗	Sell	8,958	$24.79	$222.1K	0
Nov 21, 2022↗	Sell	8,958	$20.76	$185.9K	0
Nov 7, 2022↗	Sell	8,958	$20.35	$182.3K	0
Oct 24, 2022↗	Sell	8,958	$20.46	$183.3K	0
Oct 11, 2022↗	Sell	560	$24.05	$13.5K	0
Oct 10, 2022↗	Sell	8,398	$24.28	$203.9K	0
Oct 4, 2022↗	Sell	1,300	$30.03	$39.0K	0
Sep 26, 2022↗	Sell	8,958	$24.03	$215.3K	0
Sep 12, 2022↗	Sell	8,999	$29.17	$262.5K	0
Aug 29, 2022↗	Sell	10,359	$29.55	$306.1K	0
Aug 16, 2022↗	Sell	36	$32.83	$1.2K	0
Aug 15, 2022↗	Sell	18,931	$33.00	$624.7K	0
Aug 5, 2022↗	Sell	1,558	$30.31	$47.2K	0
Aug 3, 2022↗	Sell	8,450	$30.73	$259.6K	0
Aug 1, 2022↗	Sell	8,959	$27.43	$245.7K	0
Dec 10, 2021↗	Sell	2,111	$40.52	$85.5K	0
Nov 15, 2021↗	Sell	16,406	$52.51	$861.5K	0
Nov 9, 2021↗	Sell	3,700	$56.54	$209.2K	0
Oct 21, 2021↗	Sell	2,500	$62.95	$157.4K	0
Oct 19, 2021↗	Sell	5,000	$66.24	$331.2K	0
Oct 6, 2021↗	Sell	2,500	$63.74	$159.4K	0
Oct 4, 2021↗	Sell	5,000	$61.69	$308.5K	0
Sep 30, 2021↗	Sell	12,500	$65.91	$823.9K	0
Sep 28, 2021↗	Sell	25,000	$66.15	$1.65M	0
Sep 15, 2021↗	Sell	15,000	$74.37	$1.12M	0
Sep 14, 2021↗	Sell	3,333	$74.38	$247.9K	0
Sep 13, 2021↗	Sell	26,667	$73.75	$1.97M	0
Aug 31, 2021↗	Sell	15,000	$75.72	$1.14M	0
Aug 27, 2021↗	Sell	30,000	$74.34	$2.23M	0
Aug 23, 2021↗	Sell	7,500	$70.57	$529.3K	0
Aug 17, 2021↗	Sell	12,500	$59.78	$747.3K	0
Aug 13, 2021↗	Sell	25,000	$63.21	$1.58M	0
Aug 3, 2021↗	Sell	4,020	$70.35	$282.8K	0
Jul 30, 2021↗	Sell	3,480	$70.21	$244.3K	0
Jul 21, 2021↗	Sell	12,500	$68.05	$850.6K	0
Jul 19, 2021↗	Sell	25,000	$65.30	$1.63M	0
Jul 9, 2021↗	Sell	10,000	$72.56	$725.6K	0
Jul 7, 2021↗	Sell	20,000	$69.78	$1.40M	0
Jun 24, 2021↗	Sell	10,000	$74.93	$749.3K	0
Jun 22, 2021↗	Sell	20,000	$74.81	$1.50M	0
Jun 10, 2021↗	Sell	10,000	$70.49	$704.9K	0
Jun 8, 2021↗	Sell	20,000	$71.00	$1.42M	0
Jun 1, 2021↗	Sell	2,438	$59.33	$144.7K	0
May 27, 2021↗	Sell	13,531	$60.14	$813.8K	0
May 25, 2021↗	Sell	12,632	$60.15	$759.8K	0
May 20, 2021↗	Sell	1,300	$60.47	$78.6K	0
May 18, 2021↗	Sell	100	$60.09	$6.0K	0
May 13, 2021↗	Sell	3,333	$50.71	$169.0K	0
May 11, 2021↗	Sell	6,666	$52.69	$351.3K	0
Apr 28, 2021↗	Sell	14,374	$68.48	$984.3K	0
Apr 26, 2021↗	Sell	28,748	$70.02	$2.01M	0
Apr 15, 2021↗	Sell	14,374	$68.38	$982.9K	0
Apr 13, 2021↗	Sell	28,748	$69.08	$1.99M	0
Mar 30, 2021↗	Sell	16,874	$60.97	$1.03M	0
Mar 26, 2021↗	Sell	26,249	$59.71	$1.57M	0
Mar 12, 2021↗	Sell	14,375	$64.30	$924.4K	0
Mar 10, 2021↗	Sell	28,750	$66.33	$1.91M	0
Feb 26, 2021↗	Sell	14,375	$75.03	$1.08M	0
Feb 24, 2021↗	Sell	28,750	$79.96	$2.30M	0