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 21 sales; 176 institutions reported holding it in 13F filings for Q2 2026, worth $653.8M in total; no superinvestor holds it.

Q1 2022 vs. Q4 2021

How the institutions holding Castle Biosciences Inc changed between Q4 2021 and Q1 2022.

All holders in Q1 2022 All holders in Q4 2021

13F holders of CSTL: Q4 2021 compared with Q1 2022
Measure	Q4 2021	Of which not filed for Q1 2022	Q1 2022	Change
Holders	159	2	160	+3
Shares	21.5M	10.1K	22.8M	+1.36M (+6.4%)
Value	$918.6M	$431.0K	$1.02B	+$101.7M (+11.1%)

2 institutions that held it in Q4 2021 haven't filed for Q1 2022 yet. Not filing isn't selling, so the changes leave them out.

New holders (23)

Institutions that held Castle Biosciences Inc at the end of Q1 2022 but not at the end of Q4 2021.

Institutions new to CSTL in Q1 2022
Institution	Shares	Value	% of portfolio
Bellevue Group AG	607,614	$27.3M	0.32%
Intrinsic Edge Capital Management LLC	212,400	$9.53M	0.75%
Fred Alger Management, LLC	51,883	$2.33M	0.01%
Alberta Investment Management Corp	29,230	$1.31M	0.01%
M&T Bank Corp	9,704	$436.0K	0.00%
Jane Street Group, LLC	7,660	$344.0K	0.00%
Spearhead Capital Advisors, LLC	7,437	$334.0K	0.04%
Park Avenue Securities LLC	6,478	$291.0K	0.01%
Oppenheimer Asset Management Inc.	4,989	$223.0K	0.00%
State Board of Administration of Florida Retirement System	4,654	$209.0K	0.00%
Commonwealth Equity Services, LLC	4,603	$206.0K	0.00%
Barclays PLC	3,553	$159.0K	0.00%
Amalgamated Bank	3,397	$152.0K	0.00%
Amalgamated Financial Corp.	3,397	$152.0K	0.00%
Lazard Asset Management LLC	1,277	$57.0K	0.00%
FMR LLC	451	$20.0K	0.00%
Prospera Financial Services Inc	125	$6.00K	0.00%
Quadrant Capital Group LLC	66	$3.00K	0.00%
Clearstead Advisors, LLC	22	$1.00K	0.00%
Glassman Wealth Services	23	$1.00K	0.00%
Lindbrook Capital, LLC	16	$1.00K	0.00%
Capital Advisors, Ltd. LLC	8	$0	0.00%
Tradewinds Capital Management, LLC	5	$0	0.00%

Sold out (20)

Institutions that held Castle Biosciences Inc at the end of Q4 2021 and filed for Q1 2022 without it.

Institutions that sold out of CSTL in Q1 2022
Institution	Shares, Q4 2021	Value, Q4 2021
Two Sigma Investments, LP	135,367	$5.80M
Putnam Investments LLC	77,152	$3.31M
Parian Global Management LP	29,498	$1.26M
Oberweis Asset Management Inc	26,260	$1.13M
EMC Capital Management	24,847	$1.06M
Walleye Capital LLC	13,443	$576.0K
Qube Research & Technologies Ltd	12,814	$549.0K
Susquehanna International Group, LLP	10,707	$459.0K
Dynamic Technology Lab Private Ltd	8,710	$373.0K
Handelsbanken Fonder AB	8,000	$343.0K
First Trust Advisors LP	7,936	$340.0K
Aristides Capital LLC	6,910	$296.0K
Prudential Financial Inc	4,271	$256.0K
Quantbot Technologies LP	3,081	$132.0K
Amundi	2,350	$87.0K
Simplex Trading, LLC	177	$7.00K
Healthcare of Ontario Pension Plan Trust Fund	108	$5.00K
Confluence Wealth Services, Inc.	127	$5.00K
Dark Forest Capital Management LP	87	$4.00K
Covestor Ltd	7	$0

Not filed for Q1 2022 yet (2)

Institutions that held Castle Biosciences Inc at the end of Q4 2021 and haven't filed a 13F for Q1 2022. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding CSTL in Q4 2021 that haven't filed for Q1 2022
Institution	Shares, Q4 2021	Value, Q4 2021
AlphaCentric Advisors LLC	9,500	$407.0K
NEXT Financial Group, Inc	557	$24.0K