Castellum: Funding, Investors & Team (Sep 2026)
Castellum, Inc. is a recently established technology company that focuses on acquiring businesses in the fields of cyber security, information technology, information warfare, and electronic warfare. They appointed a new management team in June 2019 with the specific objective of pursuing a growth strategy through acquisitions. The company successfully completed its first acquisition in November 2019. Interested in working with us? We are listed on the New York Stock Exchange under the ticker symbol CTM. We have contract vehicles with the General Services Administration, including the General Services Schedule and the Navy Seaport-e. You can find our stock ticker for CTM on the NYSE website: https://www.nyse.com/quote/XASE:CTM.
Castellum has raised $12.6M across 3 funding rounds on record, the most recent an undisclosed round of $5.0M announced in Jun 2025.
That round is below the $6.0M median round size for Information Technology companies tracked on FundedIQ over the last two years.
Castellum Company Profile and Key Stats
Latest funding round on record: Jun 2025.
Castellum Funding Rounds
Castellum raised $4.0M in an undisclosed round announced in Nov 2023.
1.1 years later, an undisclosed round of $3.6M was announced in Dec 2024.
6 months later, an undisclosed round of $5.0M was announced in Jun 2025.
Castellum Founders and Leadership Team
Contact details for the Castellum team: 1 of 1 has an email address on file.
Start 14-day free trial →Castellum Funding Compared to Other Information Technology Startups
Castellum's latest round of $5.0M is below the median round in Information Technology. Medians cover the last 24 months of disclosed rounds.
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Castellum Funding FAQs
What does Castellum do?
Castellum, Inc. is a recently established technology company that focuses on acquiring businesses in the fields of cyber security, information technology, information warfare, and electronic warfare. They appointed a new management team in June 2019 with the specific objective of pursuing a growth strategy through acquisitions. The company successfully completed its first acquisition in November 2019. Interested in working with us? We are listed on the New York Stock Exchange under the ticker symbol CTM. We have contract vehicles with the General Services Administration, including the General Services Schedule and the Navy Seaport-e. You can find our stock ticker for CTM on the NYSE website: https://www.nyse.com/quote/XASE:CTM.
How much funding has Castellum raised?
Castellum has raised $12.6M across 3 rounds on record. The most recent is an undisclosed round of $5.0M announced in Jun 2025.
When did Castellum last raise funding?
Castellum's most recent funding round on record is an undisclosed round of $5.0M, announced in Jun 2025.
Who founded Castellum?
FundedIQ lists Mark C Fuller (Founder) at Castellum.
Where is Castellum headquartered?
Castellum is based in Bethesda, Maryland, United States.
How many employees does Castellum have?
Castellum is in the 11-50 employee band.
How does Castellum's funding compare to other Information Technology startups?
Castellum's latest round of $5.0M is below the $6.0M median round size for Information Technology companies on FundedIQ across 3,144 tracked companies over the last two years.
About FundedIQ's Castellum Funding Data
FundedIQ tracks announced funding rounds and refreshes this profile every week. Round dates, stages and amounts are normalised to a single format, converted to US dollars, and de-duplicated: two records of the same round announced days apart are merged, and two genuinely different rounds are kept apart on the amounts they disclose. Amounts shown are the disclosed figures only — a round announced without a number is listed and excluded from the total rather than estimated.
Employee counts are reported bands, not exact headcounts. Founder and executive names carry the job title on record. Anything we do not hold for Castellum is left off this page rather than filled in.
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