Castle Biosciences Inc (CSTL)

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Sector: Healthcare

Hedge Fund Popularity

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Hedge Fund Holdings

Filing Period:

Last updated on September 09, 2026, 2:58pm based on SEC 13F filings Last update: September 09, 2026, 2:58pm

No.	Hedge Fund	Shares	Value	Activity	% Port
1.	Leucadia National Ian Cumming And Joseph Steinberg	647,391	$15,440,275		0.1%
2.	AIGH Investment Partners Orin Hirschman	545,101	$13,000,659	-8%	0.82%
3.	Renaissance Technologies Jim Simons	371,200	$8,853,120	-31%	0.01%
4.	Point72 Asset Management Steve Cohen	357,317	$8,522,010		0.01%
5.	Portolan Capital Management George Mccabe	328,818	$7,842,309	-76%	0.29%

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	$35.33	2,718	$96,037.81	9,550	2026-09-21	Filing
Maetzold Officer, Director	$35.33	3,198	$112,998.13	11,236	2026-09-21	Filing
Maetzold Officer, Director	$35.33	8,580	$303,165.72	21,479	2026-09-21	Filing
Juvenal Officer	$35.14	3,294	$115,757.75	58,584	2026-09-15	Filing
Juvenal Officer	$32.32	3,306	$106,863.14	61,878	2026-09-14	Filing

Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	3,291,963	$78,513,319	0%
2.	Rtw Investments, Llc	2,778,335	$66,263,290	0.57%
3.	Principal Financial Group Inc	1,726,648	$41,180,555	0.02%
4.	Vanguard Capital Management Llc	1,226,497	$29,251,953	0%
5.	Allianz Asset Management Ag	879,258	$20,970,303	0.02%