CASTLE BIOSCIENCES INC - Common Stock, $0.001 par value per share (CSTL)

Q: What does CUSIP 14843C105 represent in this 13F holders report?

CUSIP 14843C105 is the security identifier for CSTL - CASTLE BIOSCIENCES INC - Common Stock, $0.001 par value per share used to aggregate holder disclosures.

Q: How many institutions held CSTL - CASTLE BIOSCIENCES INC - Common Stock, $0.001 par value per share in Q3 2025?

170 institutional investors reported CSTL - CASTLE BIOSCIENCES INC - Common Stock, $0.001 par value per share for Q3 2025. Use the holders table for investor-level position and value details.

CUSIP: 14843C105

Q3 2025 13F Holders as of 30 Sep 2025

Type / Class: Equity / Common Stock, $0.001 par value per share
Shares outstanding: 30,343,438
Total 13F shares: 26,525,698
Share change: -49,352
Total reported value: $603,808,247
Put/Call ratio: 22%
Price per share: $22.77
Number of holders: 170
Value change: +$704,267
Number of buys: 94
Number of sells: 68

Security key

14843C105

Report period

Q3 2025

Institutions

170

Top holders

CSTL full security history Ownership snapshot Full 13F holder table Newer quarter: Q4 2025 Previous quarter: Q2 2025 CASTLE BIOSCIENCES INC SEC filings CASTLE BIOSCIENCES INC company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 14843C105

Newer quarter: Q4 2025 Previous quarter: Q2 2025

Recent filing periods:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Ownership snapshot

Top shareholders of CSTL - CASTLE BIOSCIENCES INC - Common Stock, $0.001 par value per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Lead holder

BlackRock, Inc.

13D/G signal

BlackRock, Inc.

Evidence rows

Latest as of

30 Jun 2025

13F 13D/G Lead comparable stake: 8.2% 13D/G row: BlackRock, Inc. Showing first 8 of 50 holder rows. Open remaining rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
BlackRock, Inc.	13F 13D/G Company 13F 13D/G	8.2% from 13D/G	$64,418,546 3,154,679 shares	—	30 Jun 2025
WASATCH ADVISORS LP	13F 13D/G Company 13F 13D/G	3.5% from 13D/G	$21,436,365 1,049,773 shares	—	30 Jun 2025
VANGUARD GROUP INC	13F Company 13F	7.2%	$44,311,972 2,170,028 shares	—	30 Jun 2025
PRINCIPAL FINANCIAL GROUP INC	13F Company 13F	5.9%	$36,735,049 1,798,974 shares	—	30 Jun 2025
Portolan Capital Management, LLC	13F Company 13F	4.9%	$30,417,060 1,489,572 shares	—	30 Jun 2025
DIMENSIONAL FUND ADVISORS LP	13F Company 13F	4.5%	$28,138,709 1,378,005 shares	—	30 Jun 2025
Nuveen, LLC	13F Company 13F	3.5%	$21,912,845 1,073,107 shares	—	30 Jun 2025
CITADEL ADVISORS LLC	13F Company 13F	2.9%	$18,143,476 888,515 shares	—	30 Jun 2025

Show 42 additional holder rows in the full holder list

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
BRAIDWELL LP	13F Company 13F	2.7%	$16,800,249 822,735 shares	—	30 Jun 2025
Allianz Asset Management GmbH	13F Company 13F	2.4%	$14,574,612 713,742 shares	—	30 Jun 2025
STATE STREET CORP	13F Company 13F	2.3%	$14,450,969 707,687 shares	—	30 Jun 2025
GEODE CAPITAL MANAGEMENT, LLC	13F Company 13F	2.3%	$14,090,066 689,926 shares	—	30 Jun 2025
RENAISSANCE TECHNOLOGIES LLC	13F Company 13F	2.2%	$13,691,610 670,500 shares	—	30 Jun 2025
SCHRODER INVESTMENT MANAGEMENT GROUP	13F Company 13F	2.1%	$13,198,440 648,572 shares	—	30 Jun 2025
PALISADE CAPITAL MANAGEMENT, LP	13F Company 13F	1.9%	$11,743,869 575,116 shares	—	30 Jun 2025
ACADIAN ASSET MANAGEMENT LLC	13F Company 13F	1.8%	$11,109,000 544,250 shares	—	30 Jun 2025
MILLENNIUM MANAGEMENT LLC	13F Company 13F	1.4%	$8,747,867 428,397 shares	—	30 Jun 2025
WELLINGTON MANAGEMENT GROUP LLP	13F Company 13F	1.3%	$8,315,249 407,211 shares	—	30 Jun 2025
BANK OF AMERICA CORP /DE/	13F Company 13F	1.3%	$7,815,653 382,745 shares	—	30 Jun 2025
AMERIPRISE FINANCIAL INC	13F Company 13F	1.2%	$7,605,776 372,467 shares	—	30 Jun 2025
UBS Group AG	13F Company 13F	1.2%	$7,429,776 363,848 shares	—	30 Jun 2025
Parkman Healthcare Partners LLC	13F Company 13F	1.2%	$7,193,190 352,262 shares	—	30 Jun 2025
Trexquant Investment LP	13F Company 13F	1%	$6,495,030 318,072 shares	—	30 Jun 2025
SILVERCREST ASSET MANAGEMENT GROUP LLC	13F Company 13F	0.92%	$5,716,763 279,959 shares	—	30 Jun 2025
NORTHERN TRUST CORP	13F Company 13F	0.92%	$5,714,026 279,825 shares	—	30 Jun 2025
KORNITZER CAPITAL MANAGEMENT INC /KS	13F Company 13F	0.92%	$5,683,172 278,314 shares	—	30 Jun 2025
GOLDMAN SACHS GROUP INC	13F Company 13F	0.9%	$5,583,706 273,443 shares	—	30 Jun 2025
Advisors Capital Management, LLC	13F Company 13F	0.81%	$5,020,604 245,867 shares	—	30 Jun 2025
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F Company 13F	0.77%	$4,799,006 235,015 shares	—	30 Jun 2025
NEW YORK STATE COMMON RETIREMENT FUND	13F Company 13F	0.71%	$4,407,249 215,830 shares	—	30 Jun 2025
Qube Research & Technologies Ltd	13F Company 13F	0.63%	$3,931,932 192,553 shares	—	30 Jun 2025
ALGERT GLOBAL LLC	13F Company 13F	0.61%	$3,781,000 185,181 shares	—	30 Jun 2025
MORGAN STANLEY	13F Company 13F	0.55%	$3,422,169 167,588 shares	—	30 Jun 2025
Allspring Global Investments Holdings, LLC	13F Company 13F	0.53%	$3,291,194 161,175 shares	—	30 Jun 2025
D. E. Shaw & Co., Inc.	13F Company 13F	0.49%	$3,026,040 148,190 shares	—	30 Jun 2025
Connor, Clark & Lunn Investment Management Ltd.	13F Company 13F	0.42%	$2,581,721 126,431 shares	—	30 Jun 2025
Squarepoint Ops LLC	13F Company 13F	0.41%	$2,567,182 125,719 shares	—	30 Jun 2025
Birchview Capital, LP	13F Company 13F	0.36%	$2,258,452 110,600 shares	—	30 Jun 2025
BARCLAYS PLC	13F Company 13F	0.36%	$2,240,951 109,743 shares	—	30 Jun 2025
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F Company 13F	0.34%	$2,097,991 102,742 shares	—	30 Jun 2025
BNP PARIBAS FINANCIAL MARKETS	13F Company 13F	0.33%	$2,027,563 99,293 shares	—	30 Jun 2025
FRANKLIN RESOURCES INC	13F Company 13F	0.33%	$2,026,624 99,247 shares	—	30 Jun 2025
Bank of New York Mellon Corp	13F Company 13F	0.3%	$1,835,403 89,883 shares	—	30 Jun 2025
Y-Intercept (Hong Kong) Ltd	13F Company 13F	0.26%	$1,611,914 78,938 shares	—	30 Jun 2025
Orion Porfolio Solutions, LLC	13F Company 13F	0.25%	$1,562,783 76,532 shares	—	30 Jun 2025
TUDOR INVESTMENT CORP ET AL	13F Company 13F	0.25%	$1,561,191 76,454 shares	—	30 Jun 2025
ENVESTNET ASSET MANAGEMENT INC	13F Company 13F	0.23%	$1,439,161 70,478 shares	—	30 Jun 2025
Schonfeld Strategic Advisors LLC	13F Company 13F	0.22%	$1,387,047 67,926 shares	—	30 Jun 2025
Engineers Gate Manager LP	13F Company 13F	0.22%	$1,373,286 67,252 shares	—	30 Jun 2025
AMERICAN CENTURY COMPANIES INC	13F Company 13F	0.22%	$1,332,854 65,272 shares	—	30 Jun 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q3 2025

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

170

26,525,698

Rows loaded

171

Investor	Option	Weight %	Change %	Reported value	* Price	Shares	Share Change	Activity	Report Period

* Reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. An asterisk next to the price means the price is likely invalid.

Compare Q3 2025 vs Q2 2025 Across Filers

Q2 2025 holders

151

Q3 2025 holders

170

Holder diff

Investor	Q2 2025 Shares	Q3 2025 Shares	Share Diff	Share Chg %	Q2 2025 value	Q3 2025 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend