Castle Biosciences Ownership | Who Owns Castle Biosciences?
Castle Biosciences Ownership Summary
Castle Biosciences is owned by 94.55% institutional investors, 3.37% insiders, and 2.09% retail investors. Blackrock is the largest institutional shareholder, holding 11.08% of CSTL shares. Bellevue Healthcare Ord is the top mutual fund, with 4.32% of its assets in Castle Biosciences shares.
CSTL Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Castle Biosciences | 94.55% | 3.37% | 2.09% |
| Sector | Healthcare Stocks | 57.39% | 9.93% | 32.68% |
| Industry | Diagnostics & Research Stocks | 49.06% | 8.59% | 42.35% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock | 3.04M | 11.08% | $66.29M |
| Blackrock funding, inc. /de | 2.92M | 10.49% | $77.85M |
| Vanguard group | 1.83M | 6.58% | $48.84M |
| Wasatch advisors lp | 1.80M | 6.45% | $47.87M |
| Principal financial group | 1.44M | 5.16% | $38.26M |
| Dimensional fund advisors lp | 999.47K | 3.59% | $26.64M |
| Ubs group | 812.60K | 2.92% | $21.66M |
| Portolan capital management | 776.58K | 2.79% | $20.70M |
| Bellevue group | 745.98K | 2.68% | $19.88M |
| Wellington management group llp | 722.12K | 2.59% | $19.24M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Abg innovation capital partners iii gp | 36.75K | 90.45% | $979.31K |
| Birchview capital, lp | 78.00K | 1.69% | $2.08M |
| Portolan capital management | 776.58K | 1.39% | $20.70M |
| Yu fan | 22.50K | 1.13% | $599.71K |
| Parkman healthcare partners | 304.63K | 1.08% | $8.12M |
| Perkins capital management | 34.16K | 0.81% | $910.50K |
| Intrinsic edge capital management | 232.71K | 0.75% | $6.20M |
| Hussman strategic advisors | 73.50K | 0.58% | $1.96M |
| Next century growth investors | 235.21K | 0.47% | $6.27M |
| Soleus capital management | 252.92K | 0.42% | $6.74M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Ubs group | 812.60K | 0.00% | 758.47K |
| Wellington management group llp | 722.12K | 0.00% | 722.12K |
| Blackrock | 3.04M | 0.00% | 449.29K |
| Millennium management | 548.81K | 0.01% | 408.27K |
| Allianz asset management gmbh | 322.37K | 0.01% | 251.82K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Bellevue group | 745.98K | 0.38% | -516.05K |
| Portolan capital management | 776.58K | 1.39% | -479.05K |
| Soleus capital management | 252.92K | 0.42% | -409.42K |
| Morgan stanley | 249.38K | 0.00% | -401.33K |
| Braidwell lp | - | - | -331.99K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Wellington management group llp | 722.12K | 0.00% | 722.12K | $19.24M |
| Bnp paribas arbitrage, snc | 249.13K | 0.00% | 249.13K | $6.64M |
| D. e. shaw | 90.56K | 0.00% | 90.56K | $2.41M |
| Hussman strategic advisors | 73.50K | 0.58% | 73.50K | $1.96M |
| Healthcare of ontario pension plan trust fund | 35.80K | 0.00% | 35.80K | $954.07K |
Sold Out
| Holder | Change |
|---|---|
| National bank of canada /fi/ | -1.00 |
| Colonial trust advisors | -6.00 |
| Fairman group | -13.00 |
| Capital performance advisors llp | -33.00 |
| Pnc financial services group | -38.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Dec 31, 2024 | 202 | 3.59% | 26,322,033 | 2.20% | 94 | 1.10% | 106 | -11.67% | 65 | 38.30% |
| Sep 30, 2024 | 195 | 18.90% | 25,754,395 | 2.29% | 92 | 1.12% | 119 | 38.37% | 48 | -4.00% |
| Jun 30, 2024 | 163 | 7.24% | 25,178,603 | 0.98% | 91 | 1.08% | 85 | 18.06% | 50 | -7.41% |
| Mar 31, 2024 | 152 | -0.65% | 24,935,063 | 4.70% | 92 | 1.17% | 72 | -21.74% | 54 | 25.58% |
| Dec 31, 2023 | 153 | 12.50% | 23,814,798 | 3.24% | 88 | 1.19% | 92 | 26.03% | 43 | 7.50% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Bellevue Healthcare Ord | 1.20M | 4.32% | 1.20M |
| Vanguard US Total Market Shares ETF | 829.40K | 2.96% | - |
| Vanguard Total Stock Mkt Idx Inv | 830.64K | 2.91% | - |
| Strategic Advisers U.S. Total Stock{mg} | 693.06K | 2.47% | - |
| iShares Russell 2000 ETF | 691.25K | 2.42% | -6.00K |
| Wasatch Small Cap Growth Investor | 675.19K | 2.41% | -14.34K |
| Strategic Advisers Small-Mid Cap | 665.91K | 2.40% | 62.85K |
| Principal SmallCap R5 | 624.80K | 2.19% | -8.40K |
| Principal U.S. Small Cap Equity | 560.90K | 2.00% | -3.60K |
| Strategic Advisers U.S. Total Stock | 442.80K | 1.55% | 66.23K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Apr 08, 2025 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | $6.97K |
| Apr 09, 2025 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | $33.75K |
| Apr 08, 2025 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | $4.27K |
| Apr 09, 2025 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | $20.68K |
| Apr 08, 2025 | MAETZOLD DEREK J | Pres. & Chief Exec. Officer | Sell | $5.99K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q2 | - | 10 |
| 2025 Q1 | - | 61 |
| 2024 Q4 | - | 64 |
| 2024 Q3 | - | 55 |
| 2024 Q2 | - | 51 |
CSTL Ownership FAQ
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