Castelion
Builds low-cost, mass-producible hypersonic strike missiles for defense
$1BSeries C
Role not disclosedA
Altimeter
Activity from announced rounds
Activity in this selectionOct 24, 2026 · Defense tech · Jan 1, 2026
Altimeter is an investment firm identified in financing coverage for Hadrian and in Crusoe’s own funding announcement.
Recorded funding activity
Crusoe builds AI infrastructure spanning GPU cloud services, data centers and modular computing systems. Other activity recorded here includes a lead role in SciFin’s seed financing for enterprise revenue operations and participation in Castelion’s hypersonic defence systems. These examples are specific financing relationships rather than a complete firm strategy.
Sources
- Rounds participated in
- 3
- Confirmed lead rounds
- 0 2 roles undisclosed
- New companies
- 3 First participation on record · 0 follow-on
- Funding in participating rounds
- $2.9B 3 disclosed · full round size, not this investor’s share