CASTLE BIOSCIENCES INC (CSTL): Ownership & Insider Activity
Hedge funds and institutional managers reporting a position in CSTL · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
13
13F filers
Aggregate Value
$57.3M
Across holders
Last Price
$33.47
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity6 increased7 reduced2 exited
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| Qube Research & Technologies Ltd CIK 0001729829 | Hedge Fund | 589K | $14.1M | 24.5% | 0.0% | Added | +$709K | Q2 2026 |
| RENAISSANCE TECHNOLOGIES LLC CIK 0001037389 | Hedge Fund | 371K | $8.9M | 15.4% | 0.0% | Reduced | $-3.9M | Q2 2026 |
| Point72 Asset Management, L.P. CIK 0001603466 | Hedge Fund | 357K | $8.5M | 14.9% | 0.0% | Added | — | Q2 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 265K | $6.3M | 11.0% | 0.0% | Added | +$4.8M | Q2 2026 |
| MILLENNIUM MANAGEMENT LLC CIK 0001273087 | Hedge Fund | 205K | $4.9M | 8.5% | 0.0% | Reduced | $-3.5M | Q2 2026 |
| AQR CAPITAL MANAGEMENT LLC CIK 0001167557 | Hedge Fund | 167K | $4.0M | 6.9% | 0.0% | Added | +$3.9M | Q2 2026 |
| SHAW D E & CO INC CIK 0001009207 | Hedge Fund | 113K | $2.7M | 4.7% | 0.0% | Reduced | $-2.4M | Q2 2026 |
| Man Group plc CIK 0001637460 | Hedge Fund | 109K | $2.6M | 4.5% | 0.0% | Added | +$1.5M | Q2 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 100K | $2.4M | 4.2% | 0.0% | Reduced | $-3.5M | Q2 2026 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 0001164508 | Hedge Fund | 93K | $2.2M | 3.9% | 0.0% | Added | +$1.6M | Q2 2026 |
Added
Hedge Fund
$14.1M· 24.5% of total· 0.0% port· 589K sh· +$709K QoQ· Q2 2026
Reduced
Hedge Fund
$8.9M· 15.4% of total· 0.0% port· 371K sh· $-3.9M QoQ· Q2 2026
Added
Hedge Fund
$8.5M· 14.9% of total· 0.0% port· 357K sh· — QoQ· Q2 2026
Added
Hedge Fund
$6.3M· 11.0% of total· 0.0% port· 265K sh· +$4.8M QoQ· Q2 2026
Reduced
Hedge Fund
$4.9M· 8.5% of total· 0.0% port· 205K sh· $-3.5M QoQ· Q2 2026
Added
Hedge Fund
$4.0M· 6.9% of total· 0.0% port· 167K sh· +$3.9M QoQ· Q2 2026
Reduced
Hedge Fund
$2.7M· 4.7% of total· 0.0% port· 113K sh· $-2.4M QoQ· Q2 2026
Added
Hedge Fund
$2.6M· 4.5% of total· 0.0% port· 109K sh· +$1.5M QoQ· Q2 2026
Reduced
Hedge Fund
$2.4M· 4.2% of total· 0.0% port· 100K sh· $-3.5M QoQ· Q2 2026
Added
Hedge Fund
$2.2M· 3.9% of total· 0.0% port· 93K sh· +$1.6M QoQ· Q2 2026
Reduced
Hedge Fund
$475K· 0.8% of total· 0.0% port· 20K sh· $-536K QoQ· Q2 2026
Reduced
Hedge Fund
$345K· 0.6% of total· 0.0% port· 14K sh· $-5.0M QoQ· Q2 2026
Reduced
Hedge Fund
$2K· 0.0% of total· 0.0% port· 87 sh· $-6K QoQ· Q2 2026
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