Castle Biosciences Inc (CSTL)

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Sector: Healthcare

Hedge Fund Popularity

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Hedge Fund Holdings

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Last updated on December 09, 2025, 4:29pm based on SEC 13F filings Last update: December 09, 2025, 4:29pm

No.	Hedge Fund	Shares	Value	Activity	% Port
1.	Portolan Capital Management George Mccabe	1,515,111	$34,499,077	+2%	1.87%
2.	Braidwell LP Alex Karnal	822,735	$18,733,676		0.56%
3.	AIGH Investment Partners Orin Hirschman	707,287	$16,104,925		4.54%
4.	Millennium Management Israel Englander	575,089	$13,094,777	+35%	0.01%
5.	Renaissance Technologies Jim Simons	562,600	$12,810,402	-17%	0.02%

Insider Trading: Purchases See All

Insider	Price	Amount	Total Value	Remaining Holdings	Date	Form 4
Goldberg Director	$17.27	2,500	$43,175.00	9,065	2023-06-05	Filing
Goldberg Director	$11.23	2,300	$25,829.00	6,565	2023-06-05	Filing
Olson Director	$21.50	1,162	$24,983.00	2,968	2022-11-29	Filing
Olson Director	$18.77	220	$4,129.40	1,806	2022-05-12	Filing
Olson Director	$18.76	1,100	$20,636.00	1,586	2022-05-12	Filing

Insider Trading: Sales See All

Insider	Price	Amount	Total Value	Remaining Holdings	Date	Form 4
Maetzold Officer, Director	$40.10	1,339	$53,688.54	29,513	2026-01-06	Filing
Maetzold Officer, Director	$38.09	2,678	$102,005.02	30,852	2026-01-05	Filing
Maetzold Officer, Director	$40.35	830	$33,490.50	33,530	2025-12-22	Filing
Maetzold Officer, Director	$40.04	509	$20,380.36	34,360	2025-12-17	Filing
Oelschlager Officer	$39.31	14,888	$585,291.94	12,323	2025-12-17	Filing

Institutional Investors' Holdings

Filing Period: Filing is Ongoing

No.	Name	Shares	Value	% Port
1.	Gamma Investing Llc	52	$2,023	0%