Stocks
CSTL CASTLE BIOSCIENCES INC

CSTL

CASTLE BIOSCIENCES INC

Company with tickers: CSTL

CIK

1447362

CUSIP

14843C105

Shares Outstanding

30,295,965

Price Holdings Short Volume Short Interest Fails to Deliver SEC Filings Earnings Calls Insider Trading Congress Trades

Date	Insider	Role	Type	Shares	Price	Value	After
2026-04-06	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Convert	6,214	$2.39	$14,851	27,693
2026-04-06	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Convert	6,214	—	—	7,518
2026-04-06	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	6,214	$25.03	$155,536	21,479
2026-04-06	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Other	85,959	—	—	85,959
2026-03-26	Cotton Rodney	Director	Convert	5,329	—	—	19,331
2026-03-26	Cotton Rodney	Director	Convert	5,329	—	—	5,330
2026-03-26	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Other	85,959	—	—	85,959
2026-03-26	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	550	$25.55	$14,053	21,479
2026-03-26	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Convert	550	$2.39	$1,315	22,029
2026-03-26	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Convert	550	—	—	13,732
2026-03-18	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	650	$25.39	$16,504	21,479
2026-03-17	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Other	51,566	—	—	51,566
2026-03-17	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	18,650	$25.93	$483,595	22,129
2026-03-16	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	17,449	$25.96	$453,046	40,905
2026-03-13	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Other	51,566	—	—	51,566
2026-03-13	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	13,204	$25.45	$336,002	58,354
2026-03-12	Juvenal Tobin W	Chief Commercial Officer	Sell	20,863	$25.24	$526,582	86,825
2026-03-12	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	23,179	$25.28	$585,942	71,558
2026-03-11	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Convert	6,226	$2.39	$14,880	112,047
2026-03-11	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Convert	6,226	—	—	14,282
2026-03-11	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	17,310	$26.11	$451,947	94,737
2026-03-11	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Other	85,959	—	—	85,959
2026-03-05	Cole G Bradley	Director	Sell	4,748	$28.44	$135,033	21,964
2026-03-05	Cole G Bradley	Director	Convert	4,748	—	—	20,000
2026-03-05	Cole G Bradley	Director	Convert	4,748	$3.38	$16,048	26,712
2026-03-05	Stokes Frank	Director	Sell	6,001	$27.98	$167,908	60,085
2026-03-04	Oelschlager Kristen M	Chief Operating Officer	Convert	13,811	—	—	27,621
2026-03-04	Oelschlager Kristen M	Chief Operating Officer	Convert	25,771	—	—	45,839
2026-03-04	Oelschlager Kristen M	Chief Operating Officer	Tax	6,792	$28.17	$191,331	39,047
2026-03-04	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Tax	17,931	$28.17	$505,116	105,821
2026-03-04	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Convert	59,097	—	—	123,752
2026-03-04	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Convert	31,110	—	—	62,218
2026-03-04	Juvenal Tobin W	Chief Commercial Officer	Convert	25,771	—	—	118,087
2026-03-04	Juvenal Tobin W	Chief Commercial Officer	Tax	10,399	$28.17	$292,940	107,688
2026-03-04	Juvenal Tobin W	Chief Commercial Officer	Convert	13,811	—	—	27,621
2026-03-04	Stokes Frank	Director	Tax	10,732	$28.17	$302,320	62,286
2026-03-04	Stokes Frank	Director	Convert	3,800	—	—	14,912
2026-03-04	Stokes Frank	Director	Convert	12,186	—	—	24,372
2026-03-04	Stokes Frank	Director	Convert	24,146	—	—	73,018
2026-03-03	Oelschlager Kristen M	Chief Operating Officer	Tax	2,427	$27.57	$66,912	20,068
2026-03-03	Oelschlager Kristen M	Chief Operating Officer	Other	97,251	—	—	97,251
2026-03-03	Oelschlager Kristen M	Chief Operating Officer	Award	48,367	—	—	48,367
2026-03-03	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Tax	19,043	$27.57	$525,016	64,655
2026-03-03	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Award	102,597	—	—	102,597
2026-03-03	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Other	52,923	—	—	52,923
2026-03-03	Juvenal Tobin W	Chief Commercial Officer	Tax	3,716	$27.57	$102,450	92,316
2026-03-03	Juvenal Tobin W	Chief Commercial Officer	Award	48,367	—	—	48,367
2026-03-03	Stokes Frank	Director	Sell	5,300	$27.32	$144,796	54,183
2026-03-03	Stokes Frank	Director	Award	48,367	—	—	48,367
2026-03-03	Stokes Frank	Director	Tax	3,611	$27.57	$99,555	48,872
2026-02-04	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	646	$37.82	$24,433	83,869
2026-02-03	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	3,200	$39.91	$127,722	84,515
2026-02-03	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Other	52,923	—	—	52,923
2026-01-20	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	4,017	$40.01	$160,732	87,715
2026-01-20	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Other	52,923	—	—	52,923
2026-01-12	Oelschlager Kristen M	Chief Operating Officer	Award	9,207	—	—	9,207
2026-01-12	Oelschlager Kristen M	Chief Operating Officer	Award	9,207	—	—	21,530
2026-01-12	Oelschlager Kristen M	Chief Operating Officer	Other	97,251	—	—	97,251
2026-01-12	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Award	62,219	—	—	62,219
2026-01-12	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Award	62,219	—	—	91,732
2026-01-12	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Other	52,923	—	—	52,923
2026-01-12	Juvenal Tobin W	Chief Commercial Officer	Award	9,207	—	—	96,032
2026-01-12	Juvenal Tobin W	Chief Commercial Officer	Award	9,207	—	—	9,207
2026-01-12	Stokes Frank	Director	Award	8,124	—	—	8,124
2026-01-12	Stokes Frank	Director	Award	8,124	—	—	58,450
2026-01-06	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	1,339	$40.10	$53,689	29,513
2026-01-05	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Other	52,923	—	—	52,923
2026-01-05	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	2,678	$38.09	$102,005	30,852
2025-12-22	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Other	52,923	—	—	52,923
2025-12-22	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	830	$40.35	$33,491	33,530
2025-12-17	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	509	$40.04	$20,380	34,360
2025-12-17	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Other	52,923	—	—	52,923
2025-12-17	Oelschlager Kristen M	Chief Operating Officer	Other	97,251	—	—	97,251
2025-12-17	Oelschlager Kristen M	Chief Operating Officer	Sell	14,888	$39.31	$585,292	12,323
2025-12-16	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	12,821	$38.55	$494,301	34,869
2025-12-15	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Sell	18,513	$38.75	$717,323	48,702
2025-12-15	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Other	52,923	—	—	52,923
2025-12-11	Juvenal Tobin W	Chief Commercial Officer	Sell	13,200	$37.48	$494,736	86,825
2025-12-11	Stokes Frank	Director	Sell	4,496	$37.45	$168,375	50,326
2025-12-10	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Convert	15,424	—	—	0
2025-12-10	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Tax	6,070	$38.02	$230,781	67,215
2025-12-10	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Convert	15,424	—	—	73,285
2025-12-10	Oelschlager Kristen M	Chief Operating Officer	Tax	2,552	$38.02	$97,027	27,211
2025-12-10	Oelschlager Kristen M	Chief Operating Officer	Convert	6,170	—	—	0
2025-12-10	Oelschlager Kristen M	Chief Operating Officer	Convert	6,170	—	—	29,763
2025-12-10	Stokes Frank	Director	Convert	6,170	—	—	0
2025-12-10	Stokes Frank	Director	Tax	2,758	$38.02	$104,859	54,822
2025-12-10	Stokes Frank	Director	Convert	6,170	—	—	57,580
2025-12-10	Juvenal Tobin W	Chief Commercial Officer	Tax	2,490	$38.02	$94,670	100,025
2025-12-10	Juvenal Tobin W	Chief Commercial Officer	Convert	6,170	—	—	0
2025-12-10	Juvenal Tobin W	Chief Commercial Officer	Convert	6,170	—	—	102,515
2025-12-09	Stokes Frank	Director	Convert	14,616	—	—	14,617
2025-12-09	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Convert	33,495	—	—	33,496
2025-12-09	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Tax	13,181	$38.25	$504,173	57,861
2025-12-09	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Other	52,923	—	—	52,923
2025-12-09	MAETZOLD DEREK J	Director, Pres. & Chief Exec. Officer	Convert	33,495	—	—	71,042
2025-12-09	Oelschlager Kristen M	Chief Operating Officer	Convert	15,961	—	—	15,961
2025-12-09	Oelschlager Kristen M	Chief Operating Officer	Convert	15,961	—	—	28,284
2025-12-09	Oelschlager Kristen M	Chief Operating Officer	Other	97,251	—	—	97,251
2025-12-09	Oelschlager Kristen M	Chief Operating Officer	Tax	4,691	$38.25	$179,431	23,593