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Castle Biosciences, Inc. CSTL

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35.18 USD +0.03 (+0.10%)

Nov 4, 2026, 10:55 AM EST

35.11 Day range 36.16

17.72 52-week range 44.28

YTD: -9.58%
1 year: +11.21%

Funds holding CSTL, by value held
Fund	Value held	Weight in fund
VTI	$30.79M	0.00%
IWM	$26.80M	0.04%
NJM	$13.94M	0.02%
VXF	$12.25M	0.01%
FSSNX	$10.83M	0.03%
IWN	$9.95M	0.07%
VEXRX	$8.10M	0.04%
IBB	$8.06M	0.07%
DFAS	$7.89M	0.02%
BDSKX	$7.13M	0.13%
FESM	$6.21M	0.09%
VTWO	$6.18M	0.03%
SCHA	$5.74M	0.03%
BSVO	$5.36M	0.22%
FSMAX	$5.05M	0.01%
NAJ	$5.03M	0.04%
DFAC	$4.64M	0.01%
DFMC	$3.76M	0.05%
VSTCX	$3.66M	0.11%
IWC	$3.20M	0.26%

Held by insiders 2.32%

Held by institutions 88.42%

Float held by institutions 90.53%

Institutions 259

Top institutional holders
Holder	% held	Shares	Value	Reported
Blackrock Inc.	10.78%	3,291,963	115.68M	Jun 29, 2026
RTW Investments LP	9.09%	2,778,335	97.63M	Jun 29, 2026
Principal Financial Group, Inc.	4.91%	1,500,897	52.74M	Sep 29, 2026
Vanguard Capital Management LLC	4.01%	1,226,497	43.10M	Jun 29, 2026
Acadian Asset Management. LLC	3.01%	918,668	32.28M	Jun 29, 2026
Allianz Asset Management GmbH	2.88%	879,258	30.90M	Jun 29, 2026

Top mutual fund holders
Holder	% held	Shares	Value	Reported
VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund	2.79%	852,704	29.96M	Jun 29, 2026
Fidelity Rutland Square TRT II-Strategic Advisers U.S. Total Stock Fd.	2.60%	793,438	27.88M	Aug 30, 2026
iShares Trust-iShares Russell 2000 ETF	2.54%	776,298	27.28M	Sep 29, 2026
Principal Funds, Inc-SmallCap Fund	2.37%	725,138	25.48M	Jul 30, 2026
VANGUARD INDEX FUNDS-Vanguard Extended Market Index Fund	1.12%	342,655	12.04M	Jun 29, 2026
Fidelity Salem Street Trust-Fidelity Small Cap Index Fund	1.07%	327,806	11.52M	Aug 30, 2026

CSTL insiders
Insider	Relation	Latest transaction	Date	Shares held
BRADBURY DANIEL M	Director	Conversion of Exercise of derivative security	May 21, 2026	35,631
CAPLE KIM	Director	Conversion of Exercise of derivative security	May 21, 2026	36,121
COTTON RODNEY	Director	Conversion of Exercise of derivative security	May 21, 2026	32,998
GOLDBERG ELLEN	Director	Conversion of Exercise of derivative security	May 21, 2026	40,921
HARRISON MILES D	Director	Conversion of Exercise of derivative security	May 21, 2026	35,631
JUVENAL TOBIN W	Officer	Sale	Oct 25, 2026	45,431