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

148 trades

$59.16M

Net Position

Net Seller

$59.16M

Companies Traded

CSTL

Active Period

Feb 2021 – Apr 2026

148 total trades

Most Recent

Sell CSTL

Apr 23, 2026 · $83.8K

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

Buys

0 · $0.00

Sells

48 · $38.80M

Total Shares Bought

Total Shares Sold

590,298

CSTL Price Chart

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Date	Type	Shares	Avg Price	Value
Aug 15, 2022	Sell	17,356	$33.00	$572.7K
Aug 5, 2022	Sell	1,104	$30.31	$33.5K
Aug 3, 2022	Sell	5,981	$30.73	$183.8K
Aug 1, 2022	Sell	8,209	$27.43	$225.2K
Dec 10, 2021	Sell	2,111	$40.52	$85.5K
Nov 15, 2021	Sell	16,406	$52.51	$861.5K
Nov 9, 2021	Sell	2,268	$56.31	$127.7K
Oct 21, 2021	Sell	1,066	$63.21	$67.4K
Oct 19, 2021	Sell	1,934	$66.22	$128.1K
Oct 6, 2021	Sell	1,345	$63.65	$85.6K
Oct 4, 2021	Sell	3,033	$61.66	$187.0K
Sep 30, 2021	Sell	11,667	$65.91	$769.0K
Sep 28, 2021	Sell	22,734	$66.18	$1.50M
Sep 15, 2021	Sell	13,334	$74.37	$991.6K
Sep 14, 2021	Sell	2,139	$74.44	$159.2K
Sep 13, 2021	Sell	23,134	$73.76	$1.71M
Aug 31, 2021	Sell	12,001	$75.71	$908.6K
Aug 27, 2021	Sell	23,824	$74.37	$1.77M
Aug 23, 2021	Sell	2,500	$70.57	$176.4K
Aug 17, 2021	Sell	11,667	$59.85	$698.2K
Aug 13, 2021	Sell	22,709	$63.16	$1.43M
Aug 3, 2021	Sell	1,340	$70.35	$94.3K
Jul 30, 2021	Sell	2,320	$70.21	$162.9K
Jul 21, 2021	Sell	11,166	$68.02	$759.6K
Jul 19, 2021	Sell	23,333	$65.30	$1.52M
Jul 9, 2021	Sell	10,000	$72.56	$725.6K
Jul 7, 2021	Sell	20,000	$69.78	$1.40M
Jun 24, 2021	Sell	10,000	$74.93	$749.3K
Jun 22, 2021	Sell	20,000	$74.81	$1.50M
Jun 10, 2021	Sell	10,000	$70.49	$704.9K
Jun 8, 2021	Sell	20,000	$71.00	$1.42M
Jun 1, 2021	Sell	2,438	$59.33	$144.7K
May 27, 2021	Sell	13,531	$60.14	$813.8K
May 25, 2021	Sell	12,632	$60.15	$759.8K
May 20, 2021	Sell	1,300	$60.47	$78.6K
May 18, 2021	Sell	100	$60.09	$6.0K
May 13, 2021	Sell	3,333	$50.71	$169.0K
May 11, 2021	Sell	6,666	$52.69	$351.3K
Apr 28, 2021	Sell	14,374	$68.48	$984.3K
Apr 26, 2021	Sell	28,748	$70.02	$2.01M
Apr 15, 2021	Sell	14,374	$68.38	$982.9K
Apr 13, 2021	Sell	28,748	$69.08	$1.99M
Mar 30, 2021	Sell	16,874	$60.97	$1.03M
Mar 26, 2021	Sell	26,249	$59.71	$1.57M
Mar 12, 2021	Sell	14,375	$64.30	$924.4K
Mar 10, 2021	Sell	28,750	$66.33	$1.91M
Feb 26, 2021	Sell	14,375	$75.03	$1.08M
Feb 24, 2021	Sell	28,750	$79.96	$2.30M