CASTLE BIOSCIENCES INC

CSTLNASDAQ

$35.56+0.31 (+0.87%)as of Oct 2, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

CASTLE BIOSCIENCES INC price and activity chart data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (+60.0%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
BlackRock, Inc.	10.79%	$78.5M	0.00%	Not reported
RTW Investments, LP	9.11%	$66.3M	0.57%	Add 0.73%
Principal Financial Group Inc	5.66%	$41.2M	0.02%	Not reported
Vanguard Capital Management LLC	4.02%	$29.3M	0.00%	Not reported
Acadian Asset Management LLC	3.01%	$21.9M	0.03%	Not reported
Vanguard Portfolio Management LLC	2.76%	$20.1M	0.00%	Not reported
Summit Partners Public Asset Management, LLC	2.70%	$19.7M	0.35%	Reduce 12.31%
State Street Corp	2.69%	$19.6M	0.00%	Not reported
Allianz Asset Management GmbH	2.66%	$19.9M	0.02%	Not reported
Geode Capital Management, LLC	2.61%	$19M	0.00%	Not reported
Mackenzie Financial Corp	2.60%	$18.9M	0.02%	Not reported
Dimensional Fund Advisors LP	2.59%	$18.9M	0.00%	Not reported
Jefferies Financial Group Inc.	2.12%	$15.4M	0.10%	New Not reported
Qube Research & Technologies Ltd	1.93%	$14.1M	0.01%	Not reported
AIGH Capital Management LLC	1.79%	$13M	0.82%	Reduce 7.70%
Renaissance Technologies LLC	1.22%	$8.85M	0.01%	Not reported
Goldman Sachs Group Inc	1.17%	$8.55M	0.00%	Not reported
Point72 Asset Management, L.P.	1.17%	$8.52M	0.01%	Not reported
Kennedy Capital Management LLC	1.14%	$8.31M	0.15%	New Not reported
Morgan Stanley	1.08%	$7.86M	0.00%	Not reported
Portolan Capital Management, LLC	1.08%	$7.84M	0.29%	Reduce 75.65%
Panagora Asset Management Inc	0.99%	$7.18M	0.02%	Not reported
Northern Trust Corp	0.93%	$6.8M	0.00%	Not reported
Wasatch Advisors LP	0.92%	$6.66M	0.04%	Reduce 38.61%
Citadel Advisors LLC	0.87%	$6.33M	0.00%	Not reported
Kornitzer Capital Management Inc	0.87%	$6.3M	0.13%	Reduce 0.06%
Silvercrest Asset Management Group LLC	0.84%	$6.11M	0.04%	Reduce 4.63%
Charles Schwab Investment Management Inc	0.83%	$6.07M	0.00%	Not reported
Advisors Capital Management, LLC	0.78%	$5.68M	0.06%	Reduce 4.10%
New York State Common Retirement Fund	0.77%	$5.6M	0.01%	Not reported
Palisade Capital Management, LP	0.76%	$5.53M	0.24%	Reduce 56.72%
Nuveen, LLC	0.76%	$5.53M	0.00%	Not reported
Bridgeway Capital Management, LLC	0.73%	$5.28M	0.09%	Not reported
Trexquant Investment LP	0.68%	$4.92M	0.03%	Not reported
Millennium Management LLC	0.67%	$4.9M	0.00%	Not reported
Vanguard Fiduciary Trust Co	0.65%	$4.71M	0.00%	Not reported
AQR Capital Management LLC	0.55%	$3.97M	0.00%	Not reported
First Trust Advisors LP	0.48%	$3.46M	0.00%	Not reported
Parkman Healthcare Partners LLC	0.47%	$3.45M	0.35%	Add 14.78%
Empowered Funds, LLC	0.47%	$3.39M	0.02%	Add 7.68%
D. E. Shaw & Co., Inc.	0.37%	$2.69M	0.00%	Not reported
Man Group plc	0.36%	$2.59M	0.00%	Not reported
Two Sigma Investments, LP	0.33%	$2.39M	0.00%	Not reported
Bank of America Corp	0.32%	$2.36M	0.00%	Not reported
Bank of New York Mellon Corp	0.32%	$2.34M	0.00%	Not reported
Arrowstreet Capital, Limited Partnership	0.30%	$2.21M	0.00%	Not reported
UBS Group AG	0.29%	$2.13M	0.00%	Not reported
JPMorgan Chase & Co	0.28%	$2.06M	0.00%	Not reported
SummitTX Capital, L.P.	0.26%	$1.88M	0.05%	Add 17.88%
Sei Investments Co	0.24%	$1.78M	0.00%	Not reported

50 of 163 holders

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