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 2023 vs. Q2 2023

How the institutions holding Castle Biosciences Inc changed between Q2 2023 and Q3 2023.

All holders in Q3 2023 All holders in Q2 2023

13F holders of CSTL: Q2 2023 compared with Q3 2023
Measure	Q2 2023	Of which not filed for Q3 2023	Q3 2023	Change
Holders	130	1	135	+6
Shares	23.0M	525	23.2M	+181.5K (+0.8%)
Value	$316.6M	$7.20K	$391.0M	+$74.4M (+23.5%)

1 institution that held it in Q2 2023 haven't filed for Q3 2023 yet. Not filing isn't selling, so the changes leave them out.

New holders (22)

Institutions that held Castle Biosciences Inc at the end of Q3 2023 but not at the end of Q2 2023.

Institutions new to CSTL in Q3 2023
Institution	Shares	Value	% of portfolio
Deerfield Management Company, L.P. (Series C)	946,620	$16.0M	0.35%
Soleus Capital Management, L.P.	283,500	$4.79M	0.48%
Walleye Capital LLC	170,786	$2.88M	0.04%
Millrace Asset Group, Inc.	77,315	$1.31M	1.61%
Point72 Asset Management, L.P.	44,200	$746.5K	0.00%
Alpha DNA Investment Management LLC	29,399	$496.6K	0.32%
AE Wealth Management LLC	26,182	$442.2K	0.00%
Mach-1 Financial Group, Inc.	26,034	$439.7K	0.18%
Royce & Associates LP	22,809	$385.2K	0.00%
Los Angeles Capital Management LLC	21,185	$357.8K	0.00%
Versor Investments LP	14,543	$245.6K	0.05%
AQR Capital Management LLC	14,443	$243.9K	0.00%
Trexquant Investment LP	11,629	$196.4K	0.00%
BluePath Capital Management, LLC	1,811	$30.6K	0.03%
Ronald Blue Trust, Inc.	956	$13.0K	0.00%
Nelson, Van Denburg & Campbell Wealth Management Group, LLC	726	$12.3K	0.00%
Macroview Investment Management LLC	581	$9.81K	0.01%
Simplex Trading, LLC	260	$4.00K	0.00%
Group One Trading, L.P.	41	$692	0.00%
Comerica Bank	21	$355	0.00%
Tfo-TDC, LLC	15	$206	0.00%
CWM, LLC	25	$0	0.00%

Sold out (16)

Institutions that held Castle Biosciences Inc at the end of Q2 2023 and filed for Q3 2023 without it.

Institutions that sold out of CSTL in Q3 2023
Institution	Shares, Q2 2023	Value, Q2 2023
First Light Asset Management, LLC	160,126	$2.20M
Greenhouse Funds LLLP	150,670	$2.07M
Voya Investment Management LLC	116,977	$1.60M
SEI Investments Co	109,995	$1.51M
Stonepine Capital Management, LLC	91,978	$1.26M
ExodusPoint Capital Management, LP	63,773	$875.0K
Fan Yu	20,592	$282.5K
Isthmus Partners, LLC	15,342	$210.5K
Prudential Financial Inc	14,765	$202.6K
Polar Capital Holdings Plc	13,398	$183.8K
Quantbot Technologies LP	12,941	$177.6K
Qube Research & Technologies Ltd	12,699	$174.2K
Susquehanna International Group, LLP	11,551	$158.5K
Bollard Group LLC	139	$2.00K
Baystate Wealth Management LLC	50	$686
IFP Advisors, Inc	11	$235

Not filed for Q3 2023 yet (1)

Institutions that held Castle Biosciences Inc at the end of Q2 2023 and haven't filed a 13F for Q3 2023. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding CSTL in Q2 2023 that haven't filed for Q3 2023
Institution	Shares, Q2 2023	Value, Q2 2023
BerganKDV Wealth Management, LLC	525	$7.20K