Castelion designs, tests, and manufactures next-generation military systems rapidly and at massive scale to deter future wars.
Employees: 11-50
Total raised: $464.2M
Founded date: 2022
Investors 5
| Date | Name | Website |
| - | Space.VC | spacevc.co |
| - | FirstIn | wearefirst... |
| - | Forward De... | deployed.v... |
| - | Space VC | spacevc.co... |
| 26.10.2023 | Lavrock Ve... | lavrockvc.... |
Funding Rounds 3
| Date | Series | Amount | Investors |
| 08.12.2025 | Series B | $350M | - |
| 17.02.2025 | Series A | $100M | - |
| 06.10.2023 | - | $14.2M | - |
Mentions in press and media 18
| Date | Title | Description |
| 08.12.2025 | Castelion Closes $350M Series B Funding | Castelion, a Torrance, CA-based defense technology company, raised $350M in Series B funding. The round was led by Altimeter Capital and Lightspeed Venture Partners, with participation from Lavrock Ventures, Andreessen Horowitz, General Cat... |
| 07.12.2025 | Castelion: $350 Million Series B Closed To Advance U.S. Hypersonic Weapons Production | Castelion has raised $350 million in Series B financing to scale the domestic production of affordable hypersonic weapons, advancing one of the Pentagon’s highest modernization priorities. The Series B round was led by Altimeter Capital and... |
| 02.04.2025 | As US Defense Tech Surges, Europe Lags | 3 Shares Email Facebook Twitter LinkedIn Last week, news broke that Anduril Industries — perhaps the poster child for defense tech startups — is considering plans to open a factory in the U.K. The startup, valued now at $14 billion, recentl... |
| 06.03.2025 | The Surge of Defense and Tech Funding: A New Era of Innovation | February 2025 marked a seismic shift in the funding landscape, with defense technology and cybersecurity startups leading the charge. The infusion of capital into these sectors reflects a growing recognition of their importance in an increa... |
| 06.03.2025 | Defense Tech Startup Shield AI Hits $5.3B Valuation Mark | 4 Shares Email Facebook Twitter LinkedIn The direct hits just keep coming for the defense tech sector. Just a day after anti-drone tech startup Epirus raised a $250 million Series D, defense and aerospace startup Shield AI locked up a $240 ... |
| 05.03.2025 | Defense Startup Epirus Secures $250M For Anti-Drone Tech | 0 Shares Email Facebook Twitter LinkedIn Startup Epirus raised a $250 million Series D led by 8VC 1 and Washington Harbour Partners in the latest example of a defense tech raising big. The Los Angeles-based company has developed a high-ener... |
| 17.02.2025 | Castelion Scores $100M in Financing A changing defense industry | - |
| 12.02.2025 | Defense Tech Venture Funding Gains Traction | 9 Shares Email Facebook Twitter LinkedIn Venture funding for defense tech startups grew last year, but despite some large and notable funding rounds the total amount invested was lower than some might have anticipated. Funding to VC-backed ... |
| 04.02.2025 | Castelion: Defense Manufacturing Company Raises $100 Million | Castelion – a new defense manufacturer helping America and its allies preserve peace through deterrence with long-range hypersonic strike weapons – announced it has raised $100 million in debt and equity financing. And with rising tensions ... |
| 03.02.2025 | Drone Defense Startup Hidden Level Locks Up $100M in Two Rounds | 3 Shares Email Facebook Twitter LinkedIn Another day and another big round for a defense tech firm. Hidden Level raised a $65 million Series C led by DFJ Growth with participation from Booz Allen Ventures, Revolution Capital, Costanoa Ventu... |
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