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.

Q4 2022 vs. Q3 2022

How the institutions holding Castle Biosciences Inc changed between Q3 2022 and Q4 2022.

All holders in Q4 2022 All holders in Q3 2022

13F holders of CSTL: Q3 2022 compared with Q4 2022
Measure	Q3 2022	Of which not filed for Q4 2022	Q4 2022	Change
Holders	157	1	153	−3
Shares	21.9M	86	22.2M	+317.7K (+1.5%)
Value	$569.8M	$2.00K	$522.0M	−$47.8M (−8.4%)

1 institution that held it in Q3 2022 haven't filed for Q4 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 Q4 2022 but not at the end of Q3 2022.

Institutions new to CSTL in Q4 2022
Institution	Shares	Value	% of portfolio
Deerfield Management Company, L.P. (Series C)	272,135	$6.41M	0.13%
Point72 Asset Management, L.P.	201,381	$4.74M	0.02%
Stonepine Capital Management, LLC	178,240	$4.20M	1.77%
Polar Asset Management Partners Inc.	107,100	$2.52M	0.04%
Zacks Investment Management	42,489	$1.00M	0.01%
Legato Capital Management LLC	18,496	$435.4K	0.08%
TownSquare Capital, LLC	12,160	$286.2K	0.01%
Prudential Financial Inc	11,465	$269.9K	0.00%
Putnam Investments LLC	8,717	$205.2K	0.00%
Susquehanna Fundamental Investments, LLC	8,547	$201.2K	0.00%
Ten Capital Wealth Advisors, LLC	1,376	$32.4K	0.01%
GWM Advisors LLC	398	$9.37K	0.00%
Zions Bancorporation, N.A.	213	$5.01K	0.00%
Raleigh Capital Management Inc.	160	$3.77K	0.00%
Truvestments Capital LLC	135	$3.18K	0.00%
Accurate Wealth Management, LLC	61	$1.51K	0.00%
MBM Wealth Consultants, LLC	48	$1.00K	0.00%
Park Place Capital Corp	53	$1.00K	0.00%
Advisory Services Network, LLC	38	$895	0.00%
Manchester Capital Management LLC	37	$871	0.00%
SRS Capital Advisors, Inc.	12	$282	0.00%
Colonial Trust Advisors	6	$141	0.00%
IFP Advisors, Inc	11	–	–

Sold out (26)

Institutions that held Castle Biosciences Inc at the end of Q3 2022 and filed for Q4 2022 without it.

Institutions that sold out of CSTL in Q4 2022
Institution	Shares, Q3 2022	Value, Q3 2022
Soleus Capital Management, L.P.	297,840	$7.77M
Segall Bryant & Hamill, LLC	202,344	$5.28M
SEI Investments Co	88,625	$2.31M
Russell Investments Group, Ltd.	86,551	$2.25M
Voloridge Investment Management, LLC	67,432	$1.76M
Millrace Asset Group, Inc.	63,345	$1.65M
Altium Capital Management LP	60,000	$1.56M
Calamos Advisors LLC	38,876	$1.01M
Trexquant Investment LP	31,616	$825.0K
Victory Capital Management Inc	25,637	$669.0K
HRT Financial LP	23,949	$624.0K
United Capital Financial Advisers, LLC	18,054	$471.0K
Valmark Advisers, Inc.	12,269	$320.0K
New York Life Investments Alternatives	9,130	$238.0K
Simplex Trading, LLC	8,968	$233.0K
Mesirow Financial Investment Management, Inc.	7,967	$208.0K
Dark Forest Capital Management LP	6,573	$171.0K
SG Americas Securities, LLC	4,158	$108.0K
Ensign Peak Advisors, Inc	3,090	$81.0K
PEAK6 Investments LLC	2,875	$75.0K
Macquarie Group Ltd	850	$35.0K
Point72 Hong Kong Ltd	1,168	$30.0K
Almanack Investment Partners, LLC.	270	$7.00K
Howe & Rusling Inc	131	$3.00K
Hallmark Capital Management Inc	20	$1.00K
Capital Advisors, Ltd. LLC	7	$0

Not filed for Q4 2022 yet (1)

Institutions that held Castle Biosciences Inc at the end of Q3 2022 and haven't filed a 13F for Q4 2022. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding CSTL in Q3 2022 that haven't filed for Q4 2022
Institution	Shares, Q3 2022	Value, Q3 2022
FourThought Financial, LLC	86	$2.00K