Castellan Defense Systems
Castellan Defense Systems
Senior notes on a transportable gas-cooled microreactor under a defense prototyping contract. Accredited only.
Roughly half of the casualties in recent land campaigns occurred in or around fuel convoys. A three megawatt reactor that fits in shipping containers and runs for five years without refueling removes that convoy. Castellan holds a construction permit under Department of Energy authorization and a prototyping contract with options for eight units.
$24,900,000 committed of $30,000,000
$17,430,000 released · 83% subscribed
- Minimum
- $25,000
- Target coupon
- 7.15%
- Term
- 6 yr
- Investors
- 88
$1,000 per unit
Annual, fixed
Closes November 15, 2026 · 63 days remaining
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Offering documents
The filing set is determined by the rail. This offering is a Regulation D, Rule 506(c) offering.
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Form D notice of exempt offering
Form D · 12 pages · filed Feb 2, 2026
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Subscription agreement
Agreement · 49 pages · filed Feb 2, 2026
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Audited financial statements
Financials · 86 pages · filed Feb 2, 2026
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TRL assessment report
TRL report · 123 pages · filed Feb 2, 2026
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Milestone and capital release schedule
Schedule · 160 pages · filed Feb 2, 2026