How much funding has Castelion raised?

Castelion has raised $870.0M in total funding, most recently a Series B round.

Where is Castelion headquartered?

Castelion is headquartered in El Segundo, California, United States.

What industry is Castelion in?

Castelion operates in Aerospace, Defense Tech.

How many employees does Castelion have?

Castelion has 51-200 employees.

Castelion

Q: Who are Castelion's investors?

Castelion's investors include Lightspeed VP, Andreessen Horowitz, Altimeter Capital.

formerly Castellion

Peace Through Deterrence

El Segundo, United States · Founded 2022 · $870.0M raised

Aerospace

Defense Tech

Headquarters: El Segundo, California
Employees: 51–200
Founded: 2022
Business Model: B2G

Website: castelion.com
Total Funding: $870.0M
Last Round: $350.0M Series BDec 2025
Rounds: 5

About

Castelion designs and manufactures affordable hypersonic strike weapons for the US military, combining rapid iteration, vertical integration, and scalable manufacturing inspired by the WWII and Apollo engineering eras. Founded by former SpaceX executives, the company focuses on restoring America's conventional deterrence capabilities through credible, non-nuclear long-range strike systems. The company raised $350M in a December 2025 Series B and secured a $49.9M Navy contract in early 2026.

Summary

Castelion is an Aerospace company based in El Segundo, United States, founded in 2022. It has raised $870.0M in total across 5 rounds, most recently a $350.0M Series B round in Dec 2025. Investors include Lightspeed VP, Andreessen Horowitz and Altimeter Capital.

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