Castle Biosciences, Inc. · NASDAQ:CSTL
Castle Biosciences, Inc. shareholders
As of Jun 30, 2026, 170 institutions reported holding Castle Biosciences, Inc., 89.5% of its shares. Largest: BlackRock, Rtw Investments, LP and Vanguard. New holders, exits, insiders and big stakes, each with its filing.
| Holder | Shares | % of Castle Biosciences, Inc. | Change | Filed |
|---|---|---|---|---|
| BlackRock | 3.29M | 10.8% | +309K | Aug 7, 2026 |
| Rtw Investments, LP | 2.78M | 9.1% | +20,000 | Aug 14, 2026 |
| Vanguard | 2.3M | 7.5% | +37,272 | Aug 13, 2026 |
| Principal | 1.73M | 5.7% | −43,229 | Aug 4, 2026 |
| Acadian Asset Management LLC | 919K | 3.0% | +434K | Aug 13, 2026 |
| Summit Partners Public Asset Management, LLC | 825K | 2.7% | −116K | Aug 14, 2026 |
| State Street | 822K | 2.7% | +53,000 | Aug 7, 2026 |
| Allianz | 811K | 2.7% | no change | Aug 14, 2026 |
| Geode Capital | 796K | 2.6% | +67,812 | Aug 12, 2026 |
| Mackenzie | 794K | 2.6% | +719K | Aug 13, 2026 |