Castelion: Funding, Investors & Team (Sep 2026)
Castelion is a startup company in the defense technology sector that is funded by investors. They are using advanced hardware development and manufacturing techniques to address important national security issues, focusing on making solutions more cost-effective, scalable, and resilient in the supply chain.
Castelion has raised $1.2B across 4 funding rounds on record, the most recent a Series C of $800M announced in Aug 2026.
That round is above the $7.3M median round size for Government and Military companies tracked on FundedIQ over the last two years.
Castelion Company Profile and Key Stats
Latest funding round on record: Aug 2026.
Castelion Funding Rounds
Castelion raised $14.2M in a Seed announced in Oct 2023.
1.3 years later, a Series A of $70.0M was announced in Jan 2025.
11 months later, a Series B of $350M was announced in Dec 2025.
8 months later, a Series C of $800M was announced in Aug 2026.
Castelion Investors
23 investors are recorded in total; the 5 named above are those the record identifies.
Castelion Founders and Leadership Team
Contact details for the Castelion team: 3 of 3 have an email address on file, 2 have a LinkedIn profile.
Start 14-day free trial →Castelion Funding Compared to Other Government and Military Startups
Castelion's latest round of $800M is above the median round in Government and Military. Medians cover the last 24 months of disclosed rounds.
Funded Startups Like Castelion in Government and Military and El Segundo
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Castelion Funding FAQs
What does Castelion do?
Castelion is a startup company in the defense technology sector that is funded by investors. They are using advanced hardware development and manufacturing techniques to address important national security issues, focusing on making solutions more cost-effective, scalable, and resilient in the supply chain.
How much funding has Castelion raised?
Castelion has raised $1.2B across 4 rounds on record. The most recent is a Series C of $800M announced in Aug 2026.
When did Castelion last raise funding?
Castelion's most recent funding round on record is a Series C of $800M, announced in Aug 2026.
Who has invested in Castelion?
Investors on record for Castelion include Andreessen Horowitz, General Catalyst, Valor Equity Partners, Lightspeed Venture Partners, Silent Ventures. FundedIQ records 23 investors in total.
Who founded Castelion?
FundedIQ lists Andrew Kreitz (Founder), Sean Pitt (Founder) at Castelion.
Who is the CEO of Castelion?
Bryon Hargis is listed as CEO at Castelion.
Where is Castelion headquartered?
Castelion is based in El Segundo, California, United States.
How many employees does Castelion have?
Castelion is in the 11-50 employee band.
When was Castelion founded?
Castelion was founded in 2022.
How does Castelion's funding compare to other Government and Military startups?
Castelion's latest round of $800M is above the $7.3M median round size for Government and Military companies on FundedIQ across 244 tracked companies over the last two years.
About FundedIQ's Castelion 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 Castelion is left off this page rather than filled in.
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