Castellum, Inc.
Castellum, Inc. (NYSE American: CTM) provides technology services, solutions, and products focused on cybersecurity, information technology, electronic and information warfare, systems modernization, and information operations. Its primary customers are U.S. government defense, intelligence, and civilian agencies,… From the company’s description.
Over the twelve months to Sep 30, 2026, Castellum, Inc. reported revenue of $55.42M, up 9.5% from a year earlier, and a net loss of $3.15M. Its operating margin was −6.8%, and operations generated $0.41M in cash. In fiscal 2025, it reported revenue of $52.87M, up 18.1% from fiscal 2024, and a net loss of $2.40M.
Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.
What Castellum, Inc. does
In the company’s own words
Castellum, Inc. (NYSE American: CTM) provides technology services, solutions, and products focused on cybersecurity, information technology, electronic and information warfare, systems modernization, and information operations. Its primary customers are U.S. government defense, intelligence, and civilian agencies, along with state and local governments; it also serves commercial clients, including in financial services and legal sectors. Its offerings include software and systems engineering, cybersecurity, data analytics, intelligence analysis, mission planning, platform modernization, secure IT, and training and simulation. The company organizes its offerings across five market areas: Digital Solutions; C4ISR, Cyber & Space; Engineering Services; IT Services; and Mission Support. It has completed seven acquisitions since 2019. At December 31, 2025, Castellum employed 244 full- and part-time employees, and 97% held security clearances. Its website is www.castellumus.com.
Company details
- Sector
- Industrials
- Industry (SIC)
- Professional Services
- Headquarters
- VIENNA, VA
- Fiscal year end
- December
- CIK
- 1877939
- SIC
- 8742
Financial performance, year by year
Fiscal 2022–2025 · USDThe full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.
Who owns Castellum, Inc. — and what changed
Funds as of 2026Q2 · superinvestors as of 2026-06-30
Largest fund holders · Castellum, Inc.’s weight in each
Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Could not be determined for this company: bond issues.
Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.
Recent filings
All filings →Each filing opens into its own statements and disclosures here.
Put this business in context.
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