VIENNA, VA
CASTELLUM, INC.CTM— Latest position per institution from SEC 13F filings
15
Institutional holders
13.51M
Total shares held
12.66M
Estimated value
675.66K
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
3.09M
Value
2.23M
Filed
Jun 30, 2026
ARMISTICE CAPITAL, LLC
CIK 1601086
Shares
1.54M
Value
3.07M
Filed
Dec 31, 2024
MERIDIAN WEALTH MANAGEMENT, LLC
CIK 1697300
Shares
863.20K
Value
621.42K
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
816.04K
Value
587.64K
Filed
Jun 30, 2026
CAPTRUST FINANCIAL ADVISORS
CIK 1512024
Shares
626.10K
Value
450.73K
Filed
Jun 30, 2026
VANGUARD FIDUCIARY TRUST CO
CIK 933478
Shares
492.72K
Value
354.76K
Filed
Jun 30, 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
218.78K
Filed
Jun 30, 2026
BLACKROCK, INC.
CIK 2012383
Shares
265.49K
Value
191.12K
Filed
Jun 30, 2026
MAGNUS FINANCIAL GROUP LLC
CIK 1765216
Shares
250K
Value
500K
Filed
Dec 31, 2024
SAVVY ADVISORS, INC.
CIK 2003633
Shares
220.30K
Value
158.59K
Filed
Jun 30, 2026
QUADRATURE CAPITAL LTD
CIK 1651424
Shares
217.47K
Value
196.42K
Filed
Dec 31, 2025
UBS GROUP AG
CIK 1610520
Shares
208.96K
Value
150.45K
Filed
Jun 30, 2026
NORTHERN TRUST CORP
CIK 73124
Shares
171.42K
Value
123.41K
Filed
Jun 30, 2026
VIRTU FINANCIAL LLC
CIK 1533964
Shares
168.40K
Value
121.00
Filed
Jun 30, 2026
JANE STREET GROUP, LLC
CIK 1595888
Shares
129.07K
Value
92.92K
Filed
Jun 30, 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 | 3.09M | 2.23M | Jun 30, 2026 |
| 3 | ARMISTICE CAPITAL, LLC | 1601086 | 1.54M | 3.07M | Dec 31, 2024 |
| 4 | MERIDIAN WEALTH MANAGEMENT, LLC | 1697300 | 863.20K | 621.42K | Jun 30, 2026 |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 816.04K | 587.64K | Jun 30, 2026 |
| 6 | CAPTRUST FINANCIAL ADVISORS | 1512024 | 626.10K | 450.73K | Jun 30, 2026 |
| 7 | VANGUARD FIDUCIARY TRUST CO | 933478 | 492.72K | 354.76K | Jun 30, 2026 |
| 8 | GOLDMAN SACHS GROUP INC | 886982 | 353.53K | 319.31K | Dec 31, 2025 |
| 9 | STATE STREET CORP | 93751 | 303.90K | 218.78K | Jun 30, 2026 |
| 10 | BLACKROCK, INC. | 2012383 | 265.49K | 191.12K | Jun 30, 2026 |
| 11 | MAGNUS FINANCIAL GROUP LLC | 1765216 | 250K | 500K | Dec 31, 2024 |
| 12 | SAVVY ADVISORS, INC. | 2003633 | 220.30K | 158.59K | Jun 30, 2026 |
| 13 | QUADRATURE CAPITAL LTD | 1651424 | 217.47K | 196.42K | Dec 31, 2025 |
| 14 | UBS GROUP AG | 1610520 | 208.96K | 150.45K | Jun 30, 2026 |
| 15 | NORTHERN TRUST CORP | 73124 | 171.42K | 123.41K | Jun 30, 2026 |
| 16 | VIRTU FINANCIAL LLC | 1533964 | 168.40K | 121.00 | Jun 30, 2026 |
| 17 | JANE STREET GROUP, LLC | 1595888 | 129.07K | 92.92K | Jun 30, 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.