CSTL · Castle Biosciences Inc · Holdings
Market Cap
$987.67M
Shares
30.55M
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 177
Total Value: $653,710,633
Total Shares: 27,409,256
Showing 1–100
of 177 holdings by value
· page 1 of 2
Institutional Ownership Trend
26 quarters
Holder Concentration
Across 177 13F filers · Δ vs Mar 31, 2026Top Holder
12.0%
+1.2 pts
Top 5
36.3%
+0.0 pts
Top 10
51.5%
−0.8 pts
HHI
423
Broadly held+17
Quarterly Activity
vs Mar 31, 2026
New
23
Increased
79
Decreased
57
Sold Out
33
Unchanged
18
Holder count:
-10
Institutional value:
-3.8%
Shares held:
-1.0%
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Large MACKENZIE FINANCIAL CORP | +719,396 | 793,507 | |
| Large ACADIAN ASSET MANAGEMENT LLC | +434,227 | 918,668 | |
| Mega BlackRock, Inc. | +309,017 | 3,291,963 | |
| Large Allspring Global Investments Holdings, LLC | +131,807 | 292,470 | |
| Mega AQR CAPITAL MANAGEMENT LLC | +101,687 | 166,567 |
Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mid Portolan Capital Management, LLC | −1,021,465 | 328,818 | |
| Mid PALISADE CAPITAL MANAGEMENT, LP | −303,953 | 231,931 | |
| Mega Nuveen, LLC | −290,401 | 231,726 | |
| Mega DIMENSIONAL FUND ADVISORS LP | −248,676 | 791,085 | |
| Large TUDOR INVESTMENT CORP ET AL | −208,520 | 14,462 |
Top New Positions
vs Mar 31, 2026| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Large Jefferies Financial Group Inc. | 647,391 | $15,440,275 | |
| Large Point72 Asset Management, L.P. | 357,317 | $8,522,010 | |
| Mid KENNEDY CAPITAL MANAGEMENT LLC | 348,371 | $8,308,648 | |
| Mega FIRST TRUST ADVISORS LP | 145,064 | $3,459,776 | |
| Mega NORGES BANK | 60,100 | $1,433,385 |
Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mid EVENTIDE ASSET MANAGEMENT, LLC | 386,425 | $9,486,733 | |
| Mega SCHRODER INVESTMENT MANAGEMENT GROUP | 298,941 | $7,339,001 | |
| Mega SG Americas Securities, LLC | 244,886 | $6,011,951 | |
| Small FORMULA GROWTH LTD | 46,000 | $1,129,300 | |
| Large NOMURA HOLDINGS INC | 35,748 | $877,613 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. | $78,513,308 | 12.01% | 3,291,963 | Shares | 2026-08-07 | |
| Large RTW INVESTMENTS, LP | $66,263,289 | 10.14% | 2,778,335 | Shares | 2026-08-14 | |
| Mega PRINCIPAL FINANCIAL GROUP INC | $41,180,554 | 6.30% | 1,726,648 | Shares | 2026-08-04 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $29,251,953 | 4.47% | 1,226,497 | Shares | 2026-08-13 | |
| Large ACADIAN ASSET MANAGEMENT LLC | $21,910,231 | 3.35% | 918,668 | Shares | 2026-08-13 | |
| Mega Allianz Asset Management GmbH | $20,970,302 | 3.21% | 879,258 | Shares | 2026-09-02 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC | $20,052,722 | 3.07% | 840,785 | Shares | 2026-08-13 | |
| Mid SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | $19,673,197 | 3.01% | 824,872 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP | $19,606,584 | 3.00% | 822,079 | Shares | 2026-08-07 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | $18,982,501 | 2.90% | 795,912 | Shares | 2026-08-12 | |
| Large MACKENZIE FINANCIAL CORP | $18,925,141 | 2.90% | 793,507 | Shares | 2026-08-13 | |
| Mega DIMENSIONAL FUND ADVISORS LP | $18,867,375 | 2.89% | 791,085 | Shares | 2026-08-11 | |
| Large Jefferies Financial Group Inc. | $15,440,275 | 2.36% | 647,391 | Shares | 2026-08-17 | |
| Mega Qube Research & Technologies Ltd | $14,054,805 | 2.15% | 589,300 | Shares | 2026-08-14 | |
| Mid AIGH Capital Management LLC | $13,000,658 | 1.99% | 545,101 | Shares | 2026-08-07 | |
| Large RENAISSANCE TECHNOLOGIES LLC | $8,853,120 | 1.35% | 371,200 | Shares | 2026-08-13 | |
| Mega GOLDMAN SACHS GROUP INC | $8,547,768 | 1.31% | 358,397 | Shares | 2026-08-14 | |
| Large Point72 Asset Management, L.P. | $8,522,010 | 1.30% | 357,317 | Shares | 2026-08-14 | |
| Mid KENNEDY CAPITAL MANAGEMENT LLC | $8,308,648 | 1.27% | 348,371 | Shares | 2026-08-14 | |
| Large Connor, Clark & Lunn Investment Management Ltd. | $7,911,688 | 1.21% | 331,727 | Shares | 2026-08-13 | |
| Mega MORGAN STANLEY | $7,862,960 | 1.20% | 329,684 | Shares | 2026-08-13 | |
| Mid Portolan Capital Management, LLC | $7,842,309 | 1.20% | 328,818 | Shares | 2026-08-14 | |
| Large PANAGORA ASSET MANAGEMENT INC | $7,179,804 | 1.10% | 301,040 | Shares | 2026-08-06 | |
| Large Allspring Global Investments Holdings, LLC | $6,975,409 | 1.07% | 292,470 | Shares | 2026-08-13 | |
| Mega NORTHERN TRUST CORP Bank | $6,801,016 | 1.04% | 285,158 | Shares | 2026-08-13 | |
| Large WASATCH ADVISORS LP | $6,662,473 | 1.02% | 279,349 | Shares | 2026-07-10 | |
| Mega CITADEL ADVISORS LLC | $6,328,668 | 0.97% | 265,353 | Shares | 2026-09-02 | |
| Mid KORNITZER CAPITAL MANAGEMENT INC /KS | $6,302,004 | 0.96% | 264,235 | Shares | 2026-07-31 | |
| Large SILVERCREST ASSET MANAGEMENT GROUP LLC | $6,107,865 | 0.93% | 256,095 | Shares | 2026-08-14 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $6,070,659 | 0.93% | 254,535 | Shares | 2026-08-14 | |
| Mid Advisors Capital Management, LLC | $5,681,165 | 0.87% | 238,204 | Shares | 2026-08-11 | |
| Large NEW YORK STATE COMMON RETIREMENT FUND Pension | $5,598,692 | 0.86% | 234,746 | Shares | 2026-07-29 | |
| Mid PALISADE CAPITAL MANAGEMENT, LP | $5,531,554 | 0.85% | 231,931 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $5,526,663 | 0.85% | 231,726 | Shares | 2026-08-11 | |
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC | $5,278,911 | 0.81% | 221,338 | Shares | 2026-08-14 | |
| Large Trexquant Investment LP | $4,915,747 | 0.75% | 206,111 | Shares | 2026-08-14 | |
| Mega MILLENNIUM MANAGEMENT LLC | $4,898,050 | 0.75% | 205,369 | Shares | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $4,710,231 | 0.72% | 197,494 | Shares | 2026-08-13 | |
| Mega AQR CAPITAL MANAGEMENT LLC | $3,972,621 | 0.61% | 166,567 | Shares | 2026-08-14 | |
| Mega FIRST TRUST ADVISORS LP | $3,459,776 | 0.53% | 145,064 | Shares | 2026-08-11 | |
| Small Parkman Healthcare Partners LLC | $3,453,265 | 0.53% | 144,791 | Shares | 2026-08-14 | |
| Large Empowered Funds, LLC | $3,394,761 | 0.52% | 142,338 | Shares | 2026-08-17 | |
| Large HRT FINANCIAL LP | $2,763,094 | 0.42% | 115,853 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $2,690,017 | 0.41% | 112,789 | Shares | 2026-08-14 | |
| Large Man Group plc | $2,593,949 | 0.40% | 108,761 | Shares | 2026-08-14 | |
| Mega TWO SIGMA INVESTMENTS, LP | $2,393,919 | 0.37% | 100,374 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $2,355,067 | 0.36% | 98,745 | Shares | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $2,337,727 | 0.36% | 98,018 | Shares | 2026-08-06 | |
| Mega FRANKLIN RESOURCES INC | $2,330,931 | 0.36% | 97,733 | Shares | 2026-08-13 | |
| Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $2,211,753 | 0.34% | 92,736 | Shares | 2026-08-13 | |
| Mega UBS Group AG | $2,131,425 | 0.33% | 89,368 | Shares | 2026-08-13 | |
| Mega JPMORGAN CHASE & CO | $2,022,573 | 0.31% | 84,804 | Shares | 2026-08-12 | |
| Mid SummitTX Capital, L.P. | $1,884,579 | 0.29% | 79,018 | Shares | 2026-08-14 | |
| Large SEI INVESTMENTS CO | $1,775,226 | 0.27% | 74,433 | Shares | 2026-08-14 | |
| Mid ALGERT GLOBAL LLC | $1,680,900 | 0.26% | 70,478 | Shares | 2026-08-13 | |
| Mid Orion Porfolio Solutions, LLC | $1,661,247 | 0.25% | 69,654 | Shares | 2026-08-14 | |
| Mega BNP PARIBAS ARBITRAGE, SA | $1,659,268 | 0.25% | 69,571 | Shares | 2026-08-13 | |
| Mega AMERICAN CENTURY COMPANIES INC | $1,560,100 | 0.24% | 65,413 | Shares | 2026-08-12 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $1,534,649 | 0.23% | 64,346 | Shares | 2026-08-13 | |
| Mega NORGES BANK Bank | $1,433,385 | 0.22% | 60,100 | Shares | 2026-08-12 | |
| Mega FMR LLC | $1,332,522 | 0.20% | 55,871 | Shares | 2026-08-13 | |
| Mega ENVESTNET ASSET MANAGEMENT INC | $1,315,494 | 0.20% | 55,157 | Shares | 2026-08-03 | |
| Mega Invesco Ltd. | $1,309,076 | 0.20% | 54,888 | Shares | 2026-08-14 | |
| Mega Swiss National Bank Bank | $1,280,745 | 0.20% | 53,700 | Shares | 2026-08-11 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ | $1,269,821 | 0.19% | 53,242 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $1,068,312 | 0.16% | 44,793 | Shares | 2026-08-14 | |
| Mid XTX Topco Ltd | $952,163 | 0.15% | 39,923 | Shares | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS | $930,388 | 0.14% | 39,010 | Shares | 2026-08-12 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension | $901,577 | 0.14% | 37,802 | Shares | 2026-08-24 | |
| Large KBC Group NV | $859,601 | 0.13% | 36,042 | Shares | 2026-08-05 | |
| Mid Y-Intercept (Hong Kong) Ltd | $761,196 | 0.12% | 31,916 | Shares | 2026-07-14 | |
| Mid HARBOR CAPITAL ADVISORS, INC. | $757,189 | 0.12% | 31,748 | Shares | 2026-08-07 | |
| Mega Russell Investments Group, Ltd. | $755,543 | 0.12% | 31,679 | Shares | 2026-08-06 | |
| Large STRS OHIO | $727,425 | 0.11% | 30,500 | Shares | 2026-07-30 | |
| Mega BARCLAYS PLC | $723,370 | 0.11% | 30,330 | Shares | 2026-08-14 | |
| Mega DEUTSCHE BANK AG\ Bank | $718,815 | 0.11% | 30,139 | Shares | 2026-08-07 | |
| Mega WELLS FARGO & COMPANY/MN | $704,598 | 0.11% | 29,543 | Shares | 2026-08-14 | |
| Mid Engineers Gate Manager LP | $703,098 | 0.11% | 29,480 | Shares | 2026-08-14 | |
| Mid Inspire Investing, LLC | $692,770 | 0.11% | 29,047 | Shares | 2026-08-12 | |
| Mega ALLIANCEBERNSTEIN L.P. | $646,335 | 0.10% | 27,100 | Shares | 2026-08-14 | |
| Large Universal- Beteiligungs- und Servicegesellschaft mbH | $601,520 | 0.09% | 25,221 | Shares | 2026-08-06 | |
| Large TRUIST FINANCIAL CORP | $567,296 | 0.09% | 23,786 | Shares | 2026-07-28 | |
| Large Tidal Investments LLC | $529,136 | 0.08% | 22,186 | Shares | 2026-08-13 | |
| Mega Legal & General Group Plc | $490,068 | 0.07% | 20,548 | Shares | 2026-08-14 | |
| Large Schonfeld Strategic Advisors LLC | $475,330 | 0.07% | 19,930 | Shares | 2026-08-14 | |
| Small First Bank & Trust Bank | $443,395 | 0.07% | 18,591 | Shares | 2026-07-09 | |
| Mega VANGUARD ASSET MANAGEMENT, Ltd | $421,024 | 0.06% | 17,653 | Shares | 2026-08-13 | |
| Large MetLife Investment Management, LLC | $405,640 | 0.06% | 17,008 | Shares | 2026-08-14 | |
| Small Counterpoint Mutual Funds LLC Mutual Fund | $393,763 | 0.06% | 16,510 | Shares | 2026-07-20 | |
| Mid Campbell & CO Investment Adviser LLC | $392,952 | 0.06% | 16,476 | Shares | 2026-08-03 | |
| Large Quantinno Capital Management LP | $391,807 | 0.06% | 16,428 | Shares | 2026-08-13 | |
| Mega CITIGROUP INC | $385,033 | 0.06% | 16,144 | Shares | 2026-08-03 | |
| Small PERKINS CAPITAL MANAGEMENT INC | $384,939 | 0.06% | 16,140 | Shares | 2026-07-24 | |
| Mid DIVERSIFY WEALTH MANAGEMENT, LLC | $379,978 | 0.06% | 15,932 | Shares | 2026-07-30 | |
| Mid Diversify Advisory Services, LLC | $379,978 | 0.06% | 15,932 | Shares | 2026-08-10 | |
| Large Zurcher Kantonalbank (Zurich Cantonalbank) Bank | $371,559 | 0.06% | 15,579 | Shares | 2026-08-12 | |
| Mega Jupiter Topco LLC | $358,632 | 0.05% | 15,037 | Shares | 2026-08-14 | |
| Large TUDOR INVESTMENT CORP ET AL | $344,918 | 0.05% | 14,462 | Shares | 2026-08-14 | |
| Mega LPL Financial LLC | $339,147 | 0.05% | 14,220 | Shares | 2026-08-07 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund | $328,772 | 0.05% | 13,785 | Shares | 2026-08-14 |
Key facts
CIK
1447362
CUSIP
14843C105
13F (30d)
52 filings
52 filers
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