Castelion
Low-cost hypersonic and long-range strike weapons, built by SpaceX alumni
Defense
📍 El Segundo, CA
Founded 2022
Current Valuation
Private
as of 2026-Q2 (reported target, The Information)
PRIVATE
Castelion is a defense-technology startup founded by SpaceX alumni (led by CEO Bryon Hargis) developing low-cost hypersonic and long-range strike weapons. It applies a SpaceX-style approach — vertical integration, rapid hardware iteration, and volume manufacturing — to munitions, targeting the 'magazine depth' gap exposed by recent conflicts. The Information reported in June 2026 that the company is targeting a valuation of roughly $12 billion in a new raise; that figure is a reported target and was not independently verified.
Company Profile
Growth
Reportedly targeting a ~$12B valuation (The Information, Jun 2026)
IPO Status
no imminent plans
Fundraising Status
no imminent plans
Founders & Key People
Bryon Hargis
Products
- Hypersonic strike weapons
- Low-cost long-range missiles
Competitors
Lockheed Martin (LMT) · RTX · Northrop Grumman (NOC) · Anduril Industries · Mach Industries
DefenseDefense TechHypersonicsMissiles
Private-company numbers are not real-time. Reflects publicly disclosed valuations from press releases, news reports, and tender offers as of 2026-Q2 (reported target, The Information). Refreshed quarterly.