FRIENDSWOOD, TX
CASTLE BIOSCIENCES INCCSTL— Latest position per institution from SEC 13F filings
15
Institutional holders
24.22M
Total shares held
603.21M
Estimated value
1.21M
Avg. position size
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
3.04M
Value
66.29M
Filed
Jun 30, 2024
BLACKROCK, INC.
CIK 2012383
Shares
2.98M
Value
73.23M
Filed
Mar 31, 2026
RTW INVESTMENTS, LP
CIK 1493215
Shares
2.76M
Value
67.72M
Filed
Mar 31, 2026
VANGUARD GROUP INC
CIK 102909
Shares
2.20M
Value
85.57M
Filed
Dec 31, 2025
PRINCIPAL FINANCIAL GROUP INC
CIK 1126328
Shares
1.77M
Value
43.45M
Filed
Mar 31, 2026
PORTOLAN CAPITAL MANAGEMENT, LLC
CIK 1350290
Shares
1.35M
Value
33.15M
Filed
Mar 31, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
1.18M
Value
28.91M
Filed
Mar 31, 2026
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
1.04M
Value
25.52M
Filed
Mar 31, 2026
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC
CIK 1638555
Shares
940.68K
Value
23.09M
Filed
Mar 31, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
861.77K
Value
21.16M
Filed
Mar 31, 2026
ALLIANZ ASSET MANAGEMENT GMBH
CIK 1535323
Shares
811.32K
Value
19.92M
Filed
Mar 31, 2026
STATE STREET CORP
CIK 93751
Shares
769.08K
Value
18.88M
Filed
Mar 31, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
728.10K
Value
17.88M
Filed
Mar 31, 2026
AIGH CAPITAL MANAGEMENT LLC
CIK 1835943
Shares
590.60K
Value
14.50M
Filed
Mar 31, 2026
QUBE RESEARCH & TECHNOLOGIES LTD
CIK 1729829
Shares
559.58K
Value
13.74M
Filed
Mar 31, 2026
PARK WEST ASSET MANAGEMENT LLC
CIK 1386928
Shares
556.49K
Value
11.14M
Filed
Mar 31, 2025
PALISADE CAPITAL MANAGEMENT, LP
CIK 1009006
Shares
535.88K
Value
13.16M
Filed
Mar 31, 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
Shares
532.80K
Value
13.08M
Filed
Mar 31, 2026
NUVEEN, LLC
CIK 1871926
Shares
522.13K
Value
12.82M
Filed
Mar 31, 2026
ACADIAN ASSET MANAGEMENT LLC
CIK 916542
Shares
484.44K
Value
11.88K
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK FINANCE, INC. | 1364742 | 3.04M | 66.29M | Jun 30, 2024 |
| 2 | BLACKROCK, INC. | 2012383 | 2.98M | 73.23M | Mar 31, 2026 |
| 3 | RTW INVESTMENTS, LP | 1493215 | 2.76M | 67.72M | Mar 31, 2026 |
| 4 | VANGUARD GROUP INC | 102909 | 2.20M | 85.57M | Dec 31, 2025 |
| 5 | PRINCIPAL FINANCIAL GROUP INC | 1126328 | 1.77M | 43.45M | Mar 31, 2026 |
| 6 | PORTOLAN CAPITAL MANAGEMENT, LLC | 1350290 | 1.35M | 33.15M | Mar 31, 2026 |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 1.18M | 28.91M | Mar 31, 2026 |
| 8 | DIMENSIONAL FUND ADVISORS LP | 354204 | 1.04M | 25.52M | Mar 31, 2026 |
| 9 | SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | 1638555 | 940.68K | 23.09M | Mar 31, 2026 |
| 10 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 861.77K | 21.16M | Mar 31, 2026 |
| 11 | ALLIANZ ASSET MANAGEMENT GMBH | 1535323 | 811.32K | 19.92M | Mar 31, 2026 |
| 12 | STATE STREET CORP | 93751 | 769.08K | 18.88M | Mar 31, 2026 |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 728.10K | 17.88M | Mar 31, 2026 |
| 14 | AIGH CAPITAL MANAGEMENT LLC | 1835943 | 590.60K | 14.50M | Mar 31, 2026 |
| 15 | QUBE RESEARCH & TECHNOLOGIES LTD | 1729829 | 559.58K | 13.74M | Mar 31, 2026 |
| 16 | PARK WEST ASSET MANAGEMENT LLC | 1386928 | 556.49K | 11.14M | Mar 31, 2025 |
| 17 | PALISADE CAPITAL MANAGEMENT, LP | 1009006 | 535.88K | 13.16M | Mar 31, 2026 |
| 18 | RENAISSANCE TECHNOLOGIES LLC | 1037389 | 532.80K | 13.08M | Mar 31, 2026 |
| 19 | NUVEEN, LLC | 1871926 | 522.13K | 12.82M | Mar 31, 2026 |
| 20 | ACADIAN ASSET MANAGEMENT LLC | 916542 | 484.44K | 11.88K | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.