CASTELLUM, INC.

PublicCIK: 1877939
CTMNYSE
Location

VIENNA, VA

13F Filings

Institutional Holders

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

1

VANGUARD GROUP INC

CIK 102909

Shares

3.47M

Value

3.14M

Filed

Dec 31, 2025

2

VANGUARD CAPITAL MANAGEMENT LLC

CIK 2100119

Shares

3.08M

Value

1.82M

Filed

Mar 31, 2026

3

ARMISTICE CAPITAL, LLC

CIK 1601086

Shares

1.54M

Value

3.07M

Filed

Dec 31, 2024

4

GEODE CAPITAL MANAGEMENT, LLC

CIK 1214717

Shares

944.90K

Value

557.15K

Filed

Mar 31, 2026

5

MERIDIAN WEALTH MANAGEMENT, LLC

CIK 1697300

Shares

785.80K

Value

463.23K

Filed

Mar 31, 2026

6

CAPTRUST FINANCIAL ADVISORS

CIK 1512024

Shares

626.10K

Value

369.09K

Filed

Mar 31, 2026

7

VANGUARD FIDUCIARY TRUST CO

CIK 933478

Shares

418.32K

Value

246.81K

Filed

Mar 31, 2026

8

GOLDMAN SACHS GROUP INC

CIK 886982

Shares

353.53K

Value

319.31K

Filed

Dec 31, 2025

9

STATE STREET CORP

CIK 93751

Shares

303.90K

Value

179.15K

Filed

Mar 31, 2026

10

BLACKROCK, INC.

CIK 2012383

Shares

265.49K

Value

156.50K

Filed

Mar 31, 2026

11

MAGNUS FINANCIAL GROUP LLC

CIK 1765216

Shares

250K

Value

500K

Filed

Dec 31, 2024

12

JANE STREET GROUP, LLC

CIK 1595888

Shares

236.77K

Value

139.58K

Filed

Mar 31, 2026

13

SAVVY ADVISORS, INC.

CIK 2003633

Shares

221.80K

Value

130.75K

Filed

Mar 31, 2026

14

QUADRATURE CAPITAL LTD

CIK 1651424

Shares

217.47K

Value

196.42K

Filed

Dec 31, 2025

15

XTX TOPCO LTD

CIK 1828301

Shares

204.72K

Value

223.14K

Filed

Sep 30, 2025

16

NORTHERN TRUST CORP

CIK 73124

Shares

181.90K

Value

107.23K

Filed

Mar 31, 2026

17

UBS GROUP AG

CIK 1610520

Shares

153.53K

Value

90.58K

Filed

Mar 31, 2026

18

SEI INVESTMENTS CO

CIK 350894

Shares

121.57K

Value

71.67K

Filed

Mar 31, 2026

19

SUSQUEHANNA INTERNATIONAL GROUP, LLP

CIK 1446194

Shares

102.56K

Value

92.63K

Filed

Dec 31, 2025

20

BANK OF NEW YORK MELLON CORP

CIK 1390777

Shares

100K

Value

90.32K

Filed

Dec 31, 2025

Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.