Castle Biosciences Inc

CSTL

Exchange: Nasdaq
Industry: Services-Medical Laboratories
SEC CIK: 0001447362

SEC filings (opens in a new tab)

In the last 90 days, Castle Biosciences Inc insiders filed 0 open-market purchases and 20 sales; 176 institutions reported holding it in 13F filings for Q2 2026, worth $653.8M in total; no superinvestor holds it.

Q3 2022 vs. Q2 2022

How the institutions holding Castle Biosciences Inc changed between Q2 2022 and Q3 2022.

All holders in Q3 2022 All holders in Q2 2022

13F holders of CSTL: Q2 2022 compared with Q3 2022
Measure	Q2 2022	Q3 2022	Change
Holders	146	157	+11
Shares	22.6M	21.9M	−701.8K (−3.1%)
Value	$495.0M	$569.8M	+$74.8M (+15.1%)

New holders (24)

Institutions that held Castle Biosciences Inc at the end of Q3 2022 but not at the end of Q2 2022.

Institutions new to CSTL in Q3 2022
Institution	Shares	Value	% of portfolio
Soleus Capital Management, L.P.	297,840	$7.77M	1.06%
First Light Asset Management, LLC	163,224	$4.26M	0.43%
Norges Bank	136,600	$3.56M	0.00%
Russell Investments Group, Ltd.	86,551	$2.25M	0.00%
Gsa Capital Partners LLP	65,249	$1.70M	0.23%
Millrace Asset Group, Inc.	63,345	$1.65M	2.09%
Altium Capital Management LP	60,000	$1.56M	0.59%
Algert Global LLC	49,932	$1.30M	0.08%
Calamos Advisors LLC	38,876	$1.01M	0.00%
Candriam Luxembourg S.C.A.	34,423	$898.0K	0.01%
Trexquant Investment LP	31,616	$825.0K	0.03%
D. E. Shaw & Co., Inc.	27,532	$718.0K	0.00%
Simon Quick Advisors, LLC	26,000	$678.0K	0.10%
HRT Financial LP	23,949	$624.0K	0.01%
Pictet & Cie (Europe) SA	15,957	$416.2K	0.02%
Tudor Investment Corp Et Al	14,238	$371.0K	0.01%
Mirae Asset Global Investments Co., Ltd.	10,920	$285.0K	0.00%
Aquatic Capital Management LLC	8,300	$216.0K	0.02%
Mesirow Financial Investment Management, Inc.	7,967	$208.0K	0.99%
Dark Forest Capital Management LP	6,573	$171.0K	0.03%
PEAK6 Investments LLC	2,875	$75.0K	0.00%
Almanack Investment Partners, LLC.	270	$7.00K	0.00%
China Universal Asset Management Co., Ltd.	246	$6.00K	0.00%
Hallmark Capital Management Inc	20	$1.00K	0.00%

Sold out (13)

Institutions that held Castle Biosciences Inc at the end of Q2 2022 and filed for Q3 2022 without it.

Institutions that sold out of CSTL in Q3 2022
Institution	Shares, Q2 2022	Value, Q2 2022
Sumitomo Mitsui Trust Holdings, Inc.	443,882	$9.74M
Nikko Asset Management Americas, Inc.	443,882	$9.57M
Stonepine Capital Management, LLC	295,372	$6.48M
Stanley-Laman Group, Ltd.	43,875	$963.0K
Cinctive Capital Management LP	40,000	$878.0K
Twinbeech Capital LP	32,866	$721.0K
Rice Hall James & Associates, LLC	26,750	$587.0K
Qube Research & Technologies Ltd	18,792	$412.0K
Marshall Wace, LLP	10,400	$228.0K
First Bank & Trust	7,818	$172.0K
Captrust Financial Advisors	497	$11.0K
Prospera Financial Services Inc	125	$3.00K
Tradewinds Capital Management, LLC	5	$0