Castle Biosciences, Inc. CSTL NASDAQ

NASDAQ Global Market • Healthcare • Medical - Diagnostics & Research • US • USD

SharesGrow Score

58/100

2/7 Pass

SharesGrow Intrinsic Value

There have been 50 recent insider transactions recorded for Castle Biosciences, Inc. (CSTL), including 13 buys and 37 sells. Total insider buying was valued at RSU Award and total insider selling at $5.1M.

Notable insiders with recent activity include Maetzold Derek J, Cotton Rodney, Juvenal Tobin W. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.

Insider Transactions — CSTL

Date	Name	Role	Transaction	Shares	Avg. Price	Value	Shares Owned
2026-03-26	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	278	$25.55	$7.1K	3,058
2026-03-26	Cotton Rodney	Director	Option Exercise (Sell)	5,329	-	-	5,330
2026-03-18	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	650	$25.39	$16.5K	21,479
2026-03-17	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	18,650	$25.93	$483.59K	22,129
2026-03-16	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	126	$26.68	$3.36K	40,779
2026-03-13	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	13,204	$25.45	$336K	58,354
2026-03-12	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	23,179	$25.28	$585.94K	71,558
2026-03-12	Juvenal Tobin W	Chief Commercial Officer	Informative Sell	20,863	$25.24	$526.58K	86,825
2026-03-11	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	279	$26.11	$7.28K	3,336
2026-03-05	Cole G Bradley	Director	Informative Sell	2,655	$28.51	$75.69K	19,309
2026-03-05	Stokes Frank	Chief Financial Officer	Informative Sell	6,001	$27.98	$167.91K	60,085
2026-03-04	Maetzold Derek J	Pres. & Chief Exec. Officer	Option Exercise (Sell)	31,110	-	-	62,218
2026-03-04	Stokes Frank	Chief Financial Officer	Option Exercise (Sell)	3,800	$3.38	$12.84K	14,912
2026-03-04	Juvenal Tobin W	Chief Commercial Officer	Option Exercise (Sell)	13,811	-	-	27,621
2026-03-04	Oelschlager Kristen M	Chief Operating Officer	Option Exercise (Sell)	13,811	-	-	27,621
2026-03-03	Maetzold Derek J	Pres. & Chief Exec. Officer	Tax Withholding of RSU	19,043	$27.57	$525.02K	64,655
2026-03-03	Stokes Frank	Chief Financial Officer	RSU Award	48,367	-	-	48,367
2026-03-03	Juvenal Tobin W	Chief Commercial Officer	RSU Award	48,367	-	-	48,367
2026-03-03	Oelschlager Kristen M	Chief Operating Officer	Tax Withholding of RSU	2,427	$27.57	$66.91K	20,068
2026-02-04	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	171	$38.61	$6.6K	83,698
2026-02-03	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	3,200	$39.91	$127.72K	84,515
2026-01-20	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	4,017	$40.01	$160.73K	87,715
2026-01-12	Maetzold Derek J	Pres. & Chief Exec. Officer	RSU Award	62,219	-	-	62,219
2026-01-12	Stokes Frank	Chief Financial Officer	RSU Award	8,124	-	-	8,124
2026-01-12	Juvenal Tobin W	Chief Commercial Officer	RSU Award	9,207	-	-	9,207
2026-01-12	Oelschlager Kristen M	Chief Operating Officer	RSU Award	9,207	-	-	9,207
2026-01-06	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	1,339	$40.10	$53.69K	29,513
2026-01-05	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	2,678	$38.09	$102.01K	30,852
2025-12-22	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	830	$40.35	$33.49K	33,530
2025-12-17	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	509	$40.04	$20.38K	34,360
2025-12-17	Oelschlager Kristen M	Chief Operating Officer	Informative Sell	14,888	$39.31	$585.29K	12,323
2025-12-16	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	12,821	$38.55	$494.3K	34,869
2025-12-15	Maetzold Derek J	Pres. & Chief Exec. Officer	Informative Sell	1,012	$39.30	$39.78K	47,690
2025-12-11	Stokes Frank	Chief Financial Officer	Informative Sell	4,496	$37.45	$168.38K	50,326
2025-12-11	Juvenal Tobin W	Chief Commercial Officer	Informative Sell	13,200	$37.48	$494.74K	86,825
2025-12-10	Maetzold Derek J	Pres. & Chief Exec. Officer	Option Exercise (Sell)	15,424	-	-	-
2025-12-10	Stokes Frank	Chief Financial Officer	Option Exercise (Sell)	6,170	-	-	-
2025-12-10	Juvenal Tobin W	Chief Commercial Officer	Option Exercise (Sell)	6,170	-	-	-
2025-12-10	Oelschlager Kristen M	Chief Operating Officer	Option Exercise (Sell)	6,170	-	-	-
2025-12-09	Maetzold Derek J	Pres. & Chief Exec. Officer	Option Exercise (Sell)	33,495	-	-	33,496
2025-12-09	Stokes Frank	Chief Financial Officer	Option Exercise (Sell)	14,616	-	-	14,617
2025-12-09	Juvenal Tobin W	Chief Commercial Officer	Option Exercise (Sell)	15,961	-	-	15,961
2025-12-09	Oelschlager Kristen M	Chief Operating Officer	Option Exercise (Sell)	15,961	-	-	15,961
2025-05-22	Bradbury Daniel	Director	RSU Award	13,667	-	-	13,667
2025-05-22	Cole G Bradley	Director	RSU Award	13,667	-	-	13,667
2025-05-22	Olson Tiffany	Director	RSU Award	13,667	-	-	13,667
2025-05-22	Harrison Miles	Director	RSU Award	13,667	-	-	13,667
2025-05-22	Goldberg Ellen	Director	RSU Award	13,667	-	-	13,667
2025-05-22	Caple Kim	Director	RSU Award	13,667	-	-	13,667
2025-05-22	Cotton Rodney	Director	RSU Award	13,667	-	-	13,667

■ Informative Buy/Sell — open market transaction (most significant) ■ Uninformative Buy — award, option exercise, conversion ■ Uninformative Sell — tax withholding, award vest sale ■ Neutral — gift, trust, expiry