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

13.51M

Total shares held

12.66M

Estimated value

675.66K

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

3.09M

Value

2.23M

Filed

Jun 30, 2026

3

ARMISTICE CAPITAL, LLC

CIK 1601086

Shares

1.54M

Value

3.07M

Filed

Dec 31, 2024

4

MERIDIAN WEALTH MANAGEMENT, LLC

CIK 1697300

Shares

863.20K

Value

621.42K

Filed

Jun 30, 2026

5

GEODE CAPITAL MANAGEMENT, LLC

CIK 1214717

Shares

816.04K

Value

587.64K

Filed

Jun 30, 2026

6

CAPTRUST FINANCIAL ADVISORS

CIK 1512024

Shares

626.10K

Value

450.73K

Filed

Jun 30, 2026

7

VANGUARD FIDUCIARY TRUST CO

CIK 933478

Shares

492.72K

Value

354.76K

Filed

Jun 30, 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

218.78K

Filed

Jun 30, 2026

10

BLACKROCK, INC.

CIK 2012383

Shares

265.49K

Value

191.12K

Filed

Jun 30, 2026

11

MAGNUS FINANCIAL GROUP LLC

CIK 1765216

Shares

250K

Value

500K

Filed

Dec 31, 2024

12

SAVVY ADVISORS, INC.

CIK 2003633

Shares

220.30K

Value

158.59K

Filed

Jun 30, 2026

13

QUADRATURE CAPITAL LTD

CIK 1651424

Shares

217.47K

Value

196.42K

Filed

Dec 31, 2025

14

UBS GROUP AG

CIK 1610520

Shares

208.96K

Value

150.45K

Filed

Jun 30, 2026

15

NORTHERN TRUST CORP

CIK 73124

Shares

171.42K

Value

123.41K

Filed

Jun 30, 2026

16

VIRTU FINANCIAL LLC

CIK 1533964

Shares

168.40K

Value

121.00

Filed

Jun 30, 2026

17

JANE STREET GROUP, LLC

CIK 1595888

Shares

129.07K

Value

92.92K

Filed

Jun 30, 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.