CTM · Castellum, Inc.

$0.65 -0.01 (-0.94%) At close · Aug 14

Market Cap

$61.78M

94.78M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Quarter:

Holders: 35

Total Value: $5,694,620

Total Shares: 7,909,211

Institutional Ownership Trend

15 quarters

Holder Concentration

Across 35 13F filers · Δ vs Mar 31, 2026

Top Holder

39.1%

−0.7 pts

Top 5

74.5%

−1.2 pts

Top 10

89.3%

−2.1 pts

HHI

1,914

Moderately concentrated−80

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +8

Institutional value: +24.8%

Shares held: +2.3%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mid Meridian Wealth Management, LLC	+77,400	863,200
Mega VANGUARD FIDUCIARY TRUST CO	+74,393	492,717
Mega UBS Group AG	+55,429	208,958
Large Creative Planning	+29,680	50,000
Small TWO SIGMA SECURITIES, LLC	+25,308	40,530

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega GEODE CAPITAL MANAGEMENT, LLC	−128,862	816,037
Mega JANE STREET GROUP, LLC	−107,703	129,071
Mega NORTHERN TRUST CORP	−10,482	171,420
Mid Savvy Advisors, Inc.	−1,500	220,300

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mid Virtu Financial LLC	168,401	$121,248
Mid HUB Investment Partners, LLC	57,414	$41,338
Small ARQ WEALTH ADVISORS, LLC	35,000	$25,200
Mid XTX Topco Ltd	21,910	$15,775
Micro ACT Advisors, LLC.	21,074	$15,173

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Large SEI INVESTMENTS CO	121,574	$71,728
Large HRT FINANCIAL LP	33,836	$19,963
Micro Ground Swell Capital, LLC	21,090	$12,443
Mega CITIGROUP INC	7,040	$4,153

Filter: New 12 Increased 6 Reduced 4 Sold out 4 Unchanged 13

Showing 35 of 35

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

VANGUARD CAPITAL MANAGEMENT LLC

$2,227,512

39.12%

3,093,768

Meridian Wealth Management, LLC

$621,504

10.91%

863,200

GEODE CAPITAL MANAGEMENT, LLC

$587,546

10.32%

816,037

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	163,630	$117,813	20.1%	Defined
Held directly	652,407	$469,733	79.9%	Defined

CAPTRUST FINANCIAL ADVISORS

$450,792

7.92%

626,100

VANGUARD FIDUCIARY TRUST CO

$354,756

6.23%

492,717

STATE STREET CORP

$218,808

3.84%

303,900

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS TRUST COMPANY	303,900	$218,808	100.0%	Defined

BlackRock, Inc.

$191,149

3.36%

265,486

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BlackRock Institutional Trust Company, N.A.	265,486	$191,149	100.0%	Sole

Savvy Advisors, Inc.

$158,616

2.79%

220,300

UBS Group AG

$150,449

2.64%

208,958

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	189,455	$136,407	90.7%	Defined
UBS Securities LLC	19,503	$14,042	9.3%	Defined

NORTHERN TRUST CORP

$123,422

2.17%

171,420

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	171,420	$123,422	100.0%	Defined

Virtu Financial LLC

$121,248

2.13%

168,401

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Virtu Americas LLC	168,401	$121,248	100.0%	Defined

JANE STREET GROUP, LLC

$92,930

1.63%

129,071

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	125,049	$90,035	96.9%	Defined
Jane Street Global Trading, LLC	4,022	$2,895	3.1%	Defined

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$68,251

1.20%

94,794

HUB Investment Partners, LLC

$41,338

0.73%

57,414

Creative Planning

$36,000

0.63%

50,000

Almanack Investment Partners, LLC.

$36,000

0.63%

50,000

TWO SIGMA SECURITIES, LLC

$29,181

0.51%

40,530

ARQ WEALTH ADVISORS, LLC

$25,200

0.44%

35,000

Pathstone Holdings, LLC

$22,448

0.39%

31,179

Vanguard Global Advisers, LLC

$19,687

0.35%

27,344

KESTRA PRIVATE WEALTH SERVICES, LLC

$19,620

0.34%

27,250

CAPITAL ADVISORS INC/OK

$15,840

0.28%

22,000

XTX Topco Ltd

$15,775

0.28%

21,910

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	21,910	$15,775	100.0%	Defined

ACT Advisors, LLC.

$15,173

0.27%

21,074

PKS Advisory Services, LLC

$13,630

0.24%

18,931

Blue Trust, Inc.

$10,601

0.19%

14,724

Inscription Capital, LLC

$9,000

0.16%

12,500

Welch Group, LLC

$7,200

0.13%

10,000

JONES FINANCIAL COMPANIES LLLP

$4,583

0.08%

6,366

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	6,366	$4,583	100.0%	Sole

Tower Research Capital LLC (TRC)

$4,227

0.07%

5,872

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	5,872	$4,227	100.0%	Defined

Cape Investment Advisory, Inc.

$1,440

0.03%

2,000

TD Waterhouse Canada Inc.

$360

0.01%

500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TORONTO DOMINION BANK	500	$360	100.0%	Defined

OSAIC HOLDINGS, INC.

$154

0.00%

215

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	215	$154	100.0%	Defined

HARBOUR INVESTMENTS, INC.

$108

0.00%

150

Clearstead Advisors, LLC

$72

0.00%

100

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SEI TRUST CO	121,574	$71,728	100.0%	Sole

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	7,040	$4,153	100.0%	Defined

Key facts CIK 1877939 CUSIP 14838T204 13F (30d) 35 filings 35 filers Visit website Investor relations