Hearth Microreactor, Series A

Preferred equity in a five megawatt heat-pipe reactor with a witnessed prototype and no pumps to fail.

Heat pipes move heat by evaporation and condensation inside a sealed tube. No pumps, no coolant loop, no loss-of-flow accident to design against. Hearth has demonstrated a full-power thermal prototype under third-party witness at a national laboratory and is preparing a construction permit application for a five megawatt unit at Idaho Falls.

Idaho Innovation Campus · Idaho Falls, IDConstruction permit filedEscrow: Cadence Escrow Services

TRL 6 of 9, band 5.4 to 6.5, signed by Dr. Samuel Adeyemi, PhD Nuclear Engineering; ASME Section III reviewer, on Jun 9, 2026.See the evidence it rests on

$3,860,000 committed of $5,000,000

$1,930,000 released · 77% subscribed

Released to the issuerCommitted, held in escrowRemaining

Minimum: $100
Instrument: Preferred equity
Term: None
Investors: 1,412

Closes October 15, 2026 · 32 days remaining

Eligibility depends on residency, accreditation status and how much you have already invested this year.
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No payment processor is connected. The commitment flow runs end to end, through amount, agreement, signature and receipt, and records a simulated position rather than a charge.

Instrument and terms

Instrument: Preferred equity
Risk tier: Tier I · Emerging Technology
Target coupon: Not applicable
Expected term: None
Price per unit: $13
Minimum investment: $100
Target raise: $5,000,000
Opens: June 8, 2026
Closes: October 15, 2026
Escrow agent: Cadence Escrow Services

Regulatory rail

Exemption: Regulation Crowdfunding
Offering ceiling: $5M / 12 mo
Who can buy: All investors, subject to individual caps
Resale: Restricted 12 months
Resale restriction: 12 months
Residency: No restriction
Accreditation: Not required

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