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CSTL · Castle Biosciences Inc · Held by Funds

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$33.08 -0.11 (-0.33%) At close · Oct 23
Russell 2000 member Rebalance outlook locked
Market Cap
$1.01B
Shares
30.55M
Volume · Oct 23 203.08K Avg daily vol (3M) 399.95K

Registered funds — mutual funds, ETFs and closed-end funds — whose latest Form N-PORT portfolio report holds this exact listed security, matched by CUSIP. Each row is one fund position with its size, value and weight in that fund.

Fund Ownership of CSTL by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 15.05% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 3.28% 1,003,057
Index ETFs 11.77% 3,594,940
Active ETFs 2.00% 609,933
Active funds 12.98% 3,965,637
Unclassified 0.26% 79,259
All registered funds 30.29% 9,252,826
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Funds holding CSTL

228 fund positions
Fund Balance Value % of Fund Open
VANGUARD TOTAL STOCK MARKET INDEX FUND 852,704 $20,336,990 0.00%
SmallCap Fund 725,138 $20,303,864 0.97%
iShares Russell 2000 ETF 781,367 $18,635,603 0.02%
Fidelity Small Cap Index Fund 327,806 $9,178,568 0.03%
VANGUARD EXTENDED MARKET INDEX FUND 342,655 $8,172,322 0.01%
VANGUARD EXPLORER FUND 275,891 $7,724,948 0.03%
iShares Russell 2000 Value ETF 278,685 $6,646,637 0.05%
Wasatch Micro Cap Fund 276,685 $6,598,937 0.98%
Strategic Advisers U.S. Total Stock Fund 312,066 $6,578,351 0.01%
Buffalo Small Cap Growth Fund 239,614 $5,714,794 1.22%
iShares Biotechnology ETF 208,267 $4,967,168 0.05%
VANGUARD STRATEGIC SMALL-CAP EQUITY FUND 179,326 $4,276,925 0.14%
U.S. SMALL CAP PORTFOLIO 135,065 $3,781,820 0.02%
Allspring Emerging Growth Fund 134,133 $3,755,724 1.22%
Nuveen Quant Small Cap Equity Fund 131,050 $3,669,400 0.09%
EA Bridgeway Omni Small-Cap Value ETF 142,338 $3,394,761 0.14%
Advisors Capital Small/Mid Cap Fund 135,000 $3,219,750 2.46%
Fidelity Extended Market Index Fund 151,700 $3,197,836 0.01%
BlackRock Advantage Small Cap Core Fund 151,572 $3,195,138 0.06%
Allspring VT Small Cap Growth Fund 131,049 $3,125,519 0.93%
VANGUARD RUSSELL 2000 INDEX FUND 147,766 $3,114,907 0.02%
U.S. MICRO CAP PORTFOLIO 107,575 $3,012,100 0.04%
Schwab U.S. Small-Cap ETF 138,504 $2,919,664 0.01%
Dimensional U.S. Small Cap ETF 87,066 $2,437,848 0.02%
iShares ESG Aware MSCI USA Small-Cap ETF 72,424 $2,392,165 0.08%
iShares Micro-Cap ETF 100,018 $2,385,429 0.16%
Goldman Sachs Small Cap Value Insights Fund 82,320 $2,304,960 0.17%
Schwab Small-Cap Index Fund 72,750 $2,037,000 0.03%
Dimensional U.S. Core Equity 2 ETF 71,710 $2,007,880 0.00%
Omni Small-Cap Value Fund 79,000 $1,884,150 0.14%
VANGUARD HEALTH CARE INDEX FUND 86,840 $1,830,587 0.01%
U.S. SMALL CAP VALUE PORTFOLIO 63,205 $1,769,740 0.01%
State Street(R) SPDR(R) S&P(R) Health Care Services ETF 68,966 $1,644,839 1.18%
SmallCap Account 65,500 $1,562,175 0.79%
U.S. CORE EQUITY 1 PORTFOLIO 48,422 $1,355,816 0.00%
iShares U.S. Healthcare Providers ETF 56,282 $1,342,326 0.11%
Master Small Cap Index Series 55,957 $1,334,574 0.02%
VANGUARD MARKET NEUTRAL FUND 54,516 $1,300,207 0.22%
SMALL COMPANY GROWTH PORTFOLIO 54,421 $1,297,941 0.08%
Avantis U.S. Small Cap Equity ETF 58,359 $1,230,208 0.04%
Principal U.S. Small-Cap ETF 49,822 $1,188,255 0.05%
State Street Institutional Small-Cap Equity Fund 49,283 $1,175,400 0.22%
Fidelity Total Market Index Fund 53,856 $1,135,284 0.00%
Nuveen Small Cap Blend Index Fund 39,751 $1,113,028 0.03%
Fidelity Enhanced Small Cap Core ETF 45,900 $1,094,715 0.02%
U.S. CORE EQUITY 2 PORTFOLIO 39,055 $1,093,540 0.00%
Invesco RAFI US 1500 Small-Mid ETF 36,833 $1,031,324 0.04%
Fidelity Small Cap Value Index Fund 41,892 $999,124 0.05%
Goldman Sachs Small Cap Equity Insights Fund 35,016 $980,448 0.10%
Fidelity Series Total Market Index Fund 44,418 $936,331 0.00%
Showing 1–50 of 228 positions
Key facts CIK 1447362 CUSIP 14843C105 13F (30d) 24 filings 24 filers Visit website Investor relations