Castellum, Inc. CTM

Institutional shares held 7.92 Million

0 calls

0 puts

Total value of holdings $9.19M

$0 calls

$0 puts

Market Cap $48.2M

41,513,100 Shares Out.

Institutional ownership 19.08%

# of Institutions 43

We take great care to ensure that the data presented and summarized in this overview for Castellum, Inc. is accurate and up-to-date, based on a comprehensive analysis of 13F filing forms for institutional ownership and form 4 filings for insider transactions. Please note that this data may differ from other sources and should not be relied upon as the sole basis for investment decisions.

Quarterly Institutional Activity in CTM

Shares Bought

Shares Sold

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Top Institutions Holding CTM

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Latest Institutional Activity in CTM

Top Purchases

Q3 2025

Goldman Sachs Group Inc Shares Held: 369K ($428K)

369K Shares purchased

New Holding

Q3 2025

Vanguard Group Inc Shares Held: 1.28M ($1.48M)

226K Shares purchased

21.48% Added

Q3 2025

State Street Corp Shares Held: 304K ($353K)

148K Shares purchased

94.81% Added

Q3 2025

Jane Street Group, LLC Shares Held: 336K ($389K)

141K Shares purchased

72.39% Added

Q3 2025

Geode Capital Management, LLC Shares Held: 724K ($839K)

124K Shares purchased

20.75% Added

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Top Sells

Q3 2025

Cubist Systematic Strategies, LLC Shares Held: 26.3K ($30.5K)

67.9K Shares sold

72.1% Reduced

Q3 2025

Citigroup Inc Shares Held: 29K ($33.6K)

2.65K Shares sold

8.38% Reduced

Q3 2025

Susquehanna International Group, LLP Shares Held: 17.7K ($20.5K)

19 Shares sold

0.11% Reduced

Q2 2025

Inscription Capital, LLC Shares Held: 12.5K ($14.5K)

238K Shares sold

95.0% Reduced

Q1 2025

Kestra Private Wealth Services, LLC Shares Held: 27.3K ($31.6K)

1K Shares sold

3.54% Reduced

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About CTM

Insider Transactions at CTM

Insider Transaction List

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Date	Insider	Transaction	Ownership Type	Shares Traded	Value / Price
Dec 12 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	11,000 -0.15%	$11,000 $1.16 P/Share
Dec 11 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	50,000 -0.69%	$50,000 $1.16 P/Share
Dec 10 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	127,000 -1.72%	$127,000 $1.21 P/Share

Dec 01 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	35,000 -0.47%	$35,000 $1.05 P/Share
Nov 28 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	18,000 -0.24%	$18,000 $1.05 P/Share
Nov 17 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	10,000 -0.13%	$10,000 $1.16 P/Share
Nov 14 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	90,000 -1.2%	$90,000 $1.15 P/Share
Nov 13 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	160,000 -2.08%	$160,000 $1.17 P/Share
Nov 11 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	60,000 -0.77%	$60,000 $1.18 P/Share
Sep 16 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	50,000 -0.64%	$50,000 $1.11 P/Share
Sep 15 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	50,000 -0.64%	$50,000 $1.1 P/Share
Sep 12 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	73,000 -0.92%	$73,000 $1.12 P/Share
Sep 11 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	90,000 -1.12%	$90,000 $1.12 P/Share
Sep 10 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	70,000 -0.87%	$70,000 $1.12 P/Share
Sep 09 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	150,000 -1.82%	$150,000 $1.12 P/Share
Sep 08 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	250,227 -2.95%	$250,227 $1.12 P/Share
Sep 05 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	46,473 -0.55%	$46,473 $1.08 P/Share
Sep 03 2025	Mark C Fuller	SELL Open market or private sale	Direct	500,000 -7.56%	$500,000 $1.12 P/Share

Aug 28 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	24,000 -0.28%	$24,000 $1.05 P/Share
Aug 27 2025	Jay O Wright General Counsel, Secretary	SELL Open market or private sale	Direct	40,000 -0.47%	$40,000 $1.04 P/Share

View All Transactions

Last 12 Months Summary

Buy / Acquisition

225K Shares

From 1 Insiders

Exercise of conversion of derivative security	225K shares

Sell / Disposition

4.39M Shares

From 4 Insiders

Other acquisition or disposition	291K shares
Open market or private sale	4.1M shares

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Castellum, Inc. CTM

Quarterly Institutional Activity in CTM

Top Institutions Holding CTM

Latest Institutional Activity in CTM

Top Purchases

Top Sells

About CTM

Insider Transactions at CTM

Insider Transaction List

Last 12 Months Summary

Track Institutional and Insider Activities on CTM

Institutional Portfolio Updates

Insider Trading

News