Who owns Castle Biosciences Inc (CSTL)?
118 US mutual funds and ETFs from 74 fund families reported a position in CSTL for the quarter ending 2026-06-30. Against their own report a quarter earlier, 62 raised shares, 3 opened a new position, 18 cut and 11 sold out.
Largest fund families
| Fund family | Funds | Share of fund-held shares |
|---|---|---|
| Ishares Trust | 9 | 30.7% |
| Vanguard Index Funds | 2 | 24.5% |
| Wasatch Funds Trust | 1 | 5.7% |
| Buffalo Funds | 2 | 5.4% |
| Vanguard Horizon Funds | 1 | 3.7% |
| Ea Series Trust | 1 | 2.9% |
Tracked managers holding CSTL
None of the managers Prior Moves tracks on 13F reports CSTL in its latest filing.
Source: SEC Form N-PORT, which funds file about 60 days after quarter end, and the latest 13F filings. Share counts, not trades: a change can reflect fund inflows or outflows rather than a decision about CSTL. A record of holdings, not a forecast and not investment advice. See all owner pages or the forecast board for the names our model ranks.
Our model ranks every tracked manager’s likely next buys from 13F filings. Request the dataset sample with a work email.
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