VIENNA, VA
CASTELLUM, INC.CTM— Latest position per institution from SEC 13F filings
15
Institutional holders
13.58M
Total shares held
11.96M
Estimated value
678.92K
Avg. position size
VANGUARD GROUP INC
CIK 102909
Shares
3.47M
Value
3.14M
Filed
Dec 31, 2025
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
3.08M
Value
1.82M
Filed
Mar 31, 2026
ARMISTICE CAPITAL, LLC
CIK 1601086
Shares
1.54M
Value
3.07M
Filed
Dec 31, 2024
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
944.90K
Value
557.15K
Filed
Mar 31, 2026
MERIDIAN WEALTH MANAGEMENT, LLC
CIK 1697300
Shares
785.80K
Value
463.23K
Filed
Mar 31, 2026
CAPTRUST FINANCIAL ADVISORS
CIK 1512024
Shares
626.10K
Value
369.09K
Filed
Mar 31, 2026
VANGUARD FIDUCIARY TRUST CO
CIK 933478
Shares
418.32K
Value
246.81K
Filed
Mar 31, 2026
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
353.53K
Value
319.31K
Filed
Dec 31, 2025
STATE STREET CORP
CIK 93751
Shares
303.90K
Value
179.15K
Filed
Mar 31, 2026
BLACKROCK, INC.
CIK 2012383
Shares
265.49K
Value
156.50K
Filed
Mar 31, 2026
MAGNUS FINANCIAL GROUP LLC
CIK 1765216
Shares
250K
Value
500K
Filed
Dec 31, 2024
JANE STREET GROUP, LLC
CIK 1595888
Shares
236.77K
Value
139.58K
Filed
Mar 31, 2026
SAVVY ADVISORS, INC.
CIK 2003633
Shares
221.80K
Value
130.75K
Filed
Mar 31, 2026
QUADRATURE CAPITAL LTD
CIK 1651424
Shares
217.47K
Value
196.42K
Filed
Dec 31, 2025
XTX TOPCO LTD
CIK 1828301
Shares
204.72K
Value
223.14K
Filed
Sep 30, 2025
NORTHERN TRUST CORP
CIK 73124
Shares
181.90K
Value
107.23K
Filed
Mar 31, 2026
UBS GROUP AG
CIK 1610520
Shares
153.53K
Value
90.58K
Filed
Mar 31, 2026
SEI INVESTMENTS CO
CIK 350894
Shares
121.57K
Value
71.67K
Filed
Mar 31, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 1446194
Shares
102.56K
Value
92.63K
Filed
Dec 31, 2025
BANK OF NEW YORK MELLON CORP
CIK 1390777
Shares
100K
Value
90.32K
Filed
Dec 31, 2025
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | 102909 | 3.47M | 3.14M | Dec 31, 2025 |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 3.08M | 1.82M | Mar 31, 2026 |
| 3 | ARMISTICE CAPITAL, LLC | 1601086 | 1.54M | 3.07M | Dec 31, 2024 |
| 4 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 944.90K | 557.15K | Mar 31, 2026 |
| 5 | MERIDIAN WEALTH MANAGEMENT, LLC | 1697300 | 785.80K | 463.23K | Mar 31, 2026 |
| 6 | CAPTRUST FINANCIAL ADVISORS | 1512024 | 626.10K | 369.09K | Mar 31, 2026 |
| 7 | VANGUARD FIDUCIARY TRUST CO | 933478 | 418.32K | 246.81K | Mar 31, 2026 |
| 8 | GOLDMAN SACHS GROUP INC | 886982 | 353.53K | 319.31K | Dec 31, 2025 |
| 9 | STATE STREET CORP | 93751 | 303.90K | 179.15K | Mar 31, 2026 |
| 10 | BLACKROCK, INC. | 2012383 | 265.49K | 156.50K | Mar 31, 2026 |
| 11 | MAGNUS FINANCIAL GROUP LLC | 1765216 | 250K | 500K | Dec 31, 2024 |
| 12 | JANE STREET GROUP, LLC | 1595888 | 236.77K | 139.58K | Mar 31, 2026 |
| 13 | SAVVY ADVISORS, INC. | 2003633 | 221.80K | 130.75K | Mar 31, 2026 |
| 14 | QUADRATURE CAPITAL LTD | 1651424 | 217.47K | 196.42K | Dec 31, 2025 |
| 15 | XTX TOPCO LTD | 1828301 | 204.72K | 223.14K | Sep 30, 2025 |
| 16 | NORTHERN TRUST CORP | 73124 | 181.90K | 107.23K | Mar 31, 2026 |
| 17 | UBS GROUP AG | 1610520 | 153.53K | 90.58K | Mar 31, 2026 |
| 18 | SEI INVESTMENTS CO | 350894 | 121.57K | 71.67K | Mar 31, 2026 |
| 19 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1446194 | 102.56K | 92.63K | Dec 31, 2025 |
| 20 | BANK OF NEW YORK MELLON CORP | 1390777 | 100K | 90.32K | Dec 31, 2025 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.