Portal Space Systems

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Highlights

Total Raised

—

1 rounds

Latest Round

$50

Apr 12, 2026

Stage

energy

Employees

Headquarters

News Coverage

—

Talent Signals

—

SEC Filings

—

Backers

AlleyCorp

ARK Invest

Booz Allen Ventures

FUSE

Geodesic Capital

Mach33

Funding History

$50

2026

Series A

SEC Form D Editorial

Apr 12, 2026

$50 millionSeries A · Editorial

Investors: Geodesic Capital, Mach33, Booz Allen Ventures, ARK Invest, AlleyCorp, FUSE

Portal Space Systems develops solar thermal propulsion technology for spacecraft and is pursuing future nuclear thermal propulsion systems, raising $50 million Series A to advance next-generation space propulsion.

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