Castellum (CTM) Institutional Ownership $1.12 -0.07 (-5.88%) Closing price 08/1/2025 04:10 PM EasternExtended Trading$1.14 +0.01 (+1.34%) As of 08/1/2025 07:59 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Ownership Stock AnalysisAnalyst ForecastsChartEarningsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestBuy This Stock Institutional Ownership Changes (13F Filings) for Castellum (NYSEAMERICAN:CTM)CurrentInstitutional OwnershipPercentage3.39%Number ofInstitutional Buyers(last 12 months)7TotalInstitutional Inflows(last 12 months)$4.00MNumber ofInstitutional Sellers(last 12 months)3TotalInstitutional Outflows(last 12 months)$696.09K Get CTM Insider Trade Alerts Want to know when executives and insiders are buying or selling Castellum stock? 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Email Address Skip Chart & View Institutional Buying and Selling Data CTM Institutional Buying and Selling by Quarter Castellum Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails5/15/2025Cubist Systematic Strategies LLC67,680$72K0.0%N/A0.097% 5/8/2025XTX Topco Ltd65,419$69K0.0%N/A0.094% 4/29/2025Bank of New York Mellon Corp600,002$636K0.0%-51.1%0.858% 4/17/2025Inscription Capital LLC250,000$265K0.0%N/A0.357% 2/14/2025Jane Street Group LLC449,001$898K0.0%+2,180.2%0.642% 2/12/2025Geode Capital Management LLC299,643$599K0.0%+49.9%0.428% 2/12/2025PKS Advisory Services LLC42,221$84K0.0%N/A0.060% 2/6/2025Meridian Wealth Management LLC589,400$1.18M0.1%-2.5%0.843% 2/4/2025Bank of New York Mellon Corp1,227,824$2.46M0.0%N/A1.756% 8/15/2024Armistice Capital LLC3,547,987$660K0.0%-23.8%6.691% 5/20/2024Virtu Financial LLC103,288$27K0.0%+82.2%0.195% 2/8/2024Meridian Wealth Management LLC503,500$150K0.0%+123.8%1.056% 1/18/2024Inscription Capital LLC250,000$74K0.0%N/A0.524% 10/17/2023Meridian Wealth Management LLC225,000$52K0.0%+44.2%0.473% 8/2/2023Meridian Wealth Management LLC156,000$78K0.0%-16.7%0.369% 7/19/2023 Magnus Financial Group LLC250,000$125K0.0%N/A0.592% 2/9/2023 Almanack Investment Partners LLC.50,000$63K0.0%N/A2.404% 2/1/2023Kestra Private Wealth Services LLC74,804$94K0.0%N/A3.596% 1/31/2023Kestra Advisory Services LLC73,519$93K0.0%N/A3.535% (Data available from 1/1/2016 forward) CTM Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of CTM shares? During the previous two years, 10 institutional investors and hedge funds held shares of Castellum. The most heavily invested institutionals were Meridian Wealth Management LLC ($1.18M), Jane Street Group LLC ($898K), Armistice Capital LLC ($660K), Bank of New York Mellon Corp ($636K), Geode Capital Management LLC ($599K), Inscription Capital LLC ($265K), and PKS Advisory Services LLC ($84K).Learn more on Castellum's institutional investors. What percentage of Castellum's stock is owned by institutional investors? 3.39% of Castellum's stock is owned by institutional investors. Learn more on CTM's institutional investor holdings. Which institutional investors have been buying Castellum's stock? Of the 9 institutional investors that purchased Castellum's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Bank of New York Mellon Corp ($1.23M), Inscription Capital LLC ($500K), Jane Street Group LLC ($429.31K), Meridian Wealth Management LLC ($347.50K), Geode Capital Management LLC ($99.71K), Cubist Systematic Strategies LLC ($67.68K), and XTX Topco Ltd ($65.42K). How much institutional buying is happening at Castellum? Institutional investors have bought a total of 2,182,168 shares in the last 24 months. This purchase volume represents approximately $4.00M in transactions. Which of Castellum's major shareholders have been selling company stock? The following institutional investors have sold Castellum stock in the last 24 months: Armistice Capital LLC ($1.11M), Bank of New York Mellon Corp ($627.82K), and Meridian Wealth Management LLC ($15.30K). How much institutional selling is happening at Castellum? Institutional investors have sold a total of 1,751,122 shares in the last 24 months. This volume of shares sold represents approximately $696.09K in transactions. Related Companies Conduent Institutional Ownership Paysign Institutional Ownership GRAVITY Institutional Ownership Rimini Street Institutional Ownership IBEX Institutional Ownership Zhihu Institutional Ownership Absci Institutional Ownership Lightbridge Institutional Ownership ReposiTrak Institutional Ownership Ooma Institutional Ownership This page (NYSEAMERICAN:CTM) was last updated on 8/2/2025 by MarketBeat.com Staff From Our PartnersElon’s Secret Social Security BombshellTo All Americans Born Before April 16th, 1963: Did Trump Just Give The Green Light To Radically RE-DO Social S...Banyan Hill Publishing | SponsoredMan Who Called Nvidia at $1.10 Says Buy This Now...In 2004, one man called Nvidia before just about anyone knew it existed. 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