Castelion
PrivateLast Round
Series B
Dec 5, 2025
Est. Valuation
$2.8B
Total Funding Raised
$494.2M
Momentum Score
50 /100
Company Overview
Castelion Corporation is a U.S.-based defense technology startup founded in 2022 by former SpaceX engineers Bryon Hargis, Sean Pitt, and Andrew Kreitz. The company designs, tests, and manufactures next-generation military systems, with a primary focus on developing low-cost, mass-producible hypersonic missiles for the United States and its allies. Inspired by the rapid development and manufacturing processes of the commercial space industry, Castelion aims to restore America's industrial agility to strengthen national security and deter future conflicts. The company has secured contracts with the U.S. Air Force, Navy, and Army and has raised significant venture funding from investors including Lightspeed Venture Partners, Andreessen Horowitz (a16z), and Altimeter Capital. Headquartered in El Segundo, California, Castelion also has operations in Texas.
Sector
Frontier & Industrial Tech
Verticals
Defense Tech, Space Technology, Aviation & Drones, Advanced Materials, Sensors
Business Model
B2G
Customer Profile
Government Contracts, Hardware Sales, Services & Consulting
AI Layer
Non-AI
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Castelion Comps
Public and private peers based on sector, stage, and business model.
Castelion Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series B | Dec 5, 2025 | ||||
| Debt | Jan 29, 2025 | ||||
| Series A | Jan 29, 2025 | ||||
| Seed | Oct 5, 2023 |
Key People
Founding team and executive leadership
Castelion Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Andreessen Horowitz | Series B, Series A, Seed |
| Interlagos Capital | Series B, Series A |
| Lavrock Ventures | Series B, Series A, Seed |
| BlueYard Capital | Seed, Series B, Series A |
| Cantos Ventures | Series B, Series A |
| Space VC | Series B |
| General Catalyst | Series B |
Market signals
Structured signals derived from secondary market and firmographic data.
- Mar 10, 2026
Investing in a new missile manufacturing facility in New Mexico.
- Mar 5, 2026
Plans to scale production to thousands of units per year by 2026.
Castelion Filings
SEC and related filings with document metadata.
| Typed | Date | Amount Offered | Amount Sold | Filling | Pages | Download |
|---|---|---|---|---|---|---|
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Frequently Asked Questions
Common questions about Castelion's valuation, stock price, and market status.
