FRIENDSWOOD, TX
CASTLE BIOSCIENCES INCCSTL— Latest position per institution from SEC 13F filings
15
Institutional holders
24.59M
Total shares held
567.75M
Estimated value
1.23M
Avg. position size
BLACKROCK, INC.
CIK 2012383
Shares
3.29M
Value
78.51M
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
3.04M
Value
66.29M
Filed
Jun 30, 2024
RTW INVESTMENTS, LP
CIK 1493215
Shares
2.78M
Value
66.26M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
2.20M
Value
85.57M
Filed
Dec 31, 2025
PRINCIPAL FINANCIAL GROUP INC
CIK 1126328
Shares
1.73M
Value
41.18M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
1.23M
Value
29.25M
Filed
Jun 30, 2026
ACADIAN ASSET MANAGEMENT LLC
CIK 916542
Shares
918.67K
Value
21.90K
Filed
Jun 30, 2026
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM
CIK 1081019
Shares
901.58K
Value
37.80K
Filed
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
840.78K
Value
20.05M
Filed
Jun 30, 2026
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC
CIK 1638555
Shares
824.87K
Value
19.67M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
822.08K
Value
19.63M
Filed
Jun 30, 2026
ALLIANZ ASSET MANAGEMENT GMBH
CIK 1535323
Shares
811.32K
Value
19.92M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
795.91K
Value
18.99M
Filed
Jun 30, 2026
MACKENZIE FINANCIAL CORP
CIK 919859
Shares
793.51K
Value
18.93M
Filed
Jun 30, 2026
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
791.09K
Value
18.87M
Filed
Jun 30, 2026
JEFFERIES FINANCIAL GROUP INC.
CIK 96223
Shares
647.39K
Value
15.44M
Filed
Jun 30, 2026
QUBE RESEARCH & TECHNOLOGIES LTD
CIK 1729829
Shares
589.30K
Value
14.05M
Filed
Jun 30, 2026
PARK WEST ASSET MANAGEMENT LLC
CIK 1386928
Shares
556.49K
Value
11.14M
Filed
Mar 31, 2025
AIGH CAPITAL MANAGEMENT LLC
CIK 1835943
Shares
545.10K
Value
13M
Filed
Jun 30, 2026
ESSEX INVESTMENT MANAGEMENT CO LLC
CIK 201772
Shares
480.92K
Value
10.93M
Filed
Mar 31, 2023
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK, INC. | 2012383 | 3.29M | 78.51M | Jun 30, 2026 |
| 2 | BLACKROCK FINANCE, INC. | 1364742 | 3.04M | 66.29M | Jun 30, 2024 |
| 3 | RTW INVESTMENTS, LP | 1493215 | 2.78M | 66.26M | Jun 30, 2026 |
| 4 | VANGUARD GROUP INC | 102909 | 2.20M | 85.57M | Dec 31, 2025 |
| 5 | PRINCIPAL FINANCIAL GROUP INC | 1126328 | 1.73M | 41.18M | Jun 30, 2026 |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 1.23M | 29.25M | Jun 30, 2026 |
| 7 | ACADIAN ASSET MANAGEMENT LLC | 916542 | 918.67K | 21.90K | Jun 30, 2026 |
| 8 | CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 1081019 | 901.58K | 37.80K | Jun 30, 2026 |
| 9 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 840.78K | 20.05M | Jun 30, 2026 |
| 10 | SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | 1638555 | 824.87K | 19.67M | Jun 30, 2026 |
| 11 | STATE STREET CORP | 93751 | 822.08K | 19.63M | Jun 30, 2026 |
| 12 | ALLIANZ ASSET MANAGEMENT GMBH | 1535323 | 811.32K | 19.92M | Jun 30, 2026 |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 795.91K | 18.99M | Jun 30, 2026 |
| 14 | MACKENZIE FINANCIAL CORP | 919859 | 793.51K | 18.93M | Jun 30, 2026 |
| 15 | DIMENSIONAL FUND ADVISORS LP | 354204 | 791.09K | 18.87M | Jun 30, 2026 |
| 16 | JEFFERIES FINANCIAL GROUP INC. | 96223 | 647.39K | 15.44M | Jun 30, 2026 |
| 17 | QUBE RESEARCH & TECHNOLOGIES LTD | 1729829 | 589.30K | 14.05M | Jun 30, 2026 |
| 18 | PARK WEST ASSET MANAGEMENT LLC | 1386928 | 556.49K | 11.14M | Mar 31, 2025 |
| 19 | AIGH CAPITAL MANAGEMENT LLC | 1835943 | 545.10K | 13M | Jun 30, 2026 |
| 20 | ESSEX INVESTMENT MANAGEMENT CO LLC | 201772 | 480.92K | 10.93M | Mar 31, 2023 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.