Funding rounds
Announced	Stage	Amount	Valuation	Lead investors	Other investors	Confidence
Apr 9, 2026	Series A	$50.0M	$250M	Geodesic Capital, Mach33 Financial Group	AlleyCorp, Booz Allen Ventures, FUSE	Confirmed
Apr 3, 2025	Seed	$17.5M	—	AlleyCorp	First In, FUSE, Mach33 Financial Group	Reported

Series A
Led by Geodesic Capital, Mach33 Financial Group
With AlleyCorp, Booz Allen Ventures, FUSE
Valuation $250M
Confirmed
$50.0M
Apr 9, 2026
Seed
Led by AlleyCorp
With First In, FUSE, Mach33 Financial Group
$17.5M
Apr 3, 2025

Raised counts equity rounds; debt, secondary sales and grants are totaled separately. Amounts in other currencies are converted at the announcement month's average rate. A ~ marks an estimated or converted amount.

Systems3

HEX Thruster

A 3D‑printed thruster that combines the heat exchanger and nozzle into a single component with no internal interfaces or moving parts.

Maturity not rated

Starburst

An ESPA‑class rapid‑maneuverability spacecraft.

Maturity not rated

Supernova

A maneuverable, solar‑thermal spacecraft engineered for persistent delta‑v, on‑demand autonomy, and real‑time control.

Maturity not rated

Newest unveiled first. Open a system for its milestone timeline, components and sources.

People3

All 3 people →

Jeff Thornburg
Founder
Ian Vorbach
COO
Jeff Thornburg
CEO

Sources8

Systems1

1
CompanyPortal Space
Portal Space Systems · Supports Organization · name, System
“Portal Space Systems Raises $50 Million Series A to Advance Rapidly Maneuverable Spacecraft Capabilities”

Funding5

2
CompanyPortal Space Systems Raises $50 Million Series A to Advance Rapidly Maneuverable Spacecraft Capabilities
Portal Space Systems · Apr 9, 2026 · Supports Funding round · amount, Funding round · announced on, Funding round · investors, Organization
“today announced it has raised $50 million in Series A funding. The round was led by Geodesic Capital and Mach33”
3
Regulatory filingPortal Space Systems Inc. - SEC Form D (0001231919-26-000275)
U.S. Securities and Exchange Commission · Mar 26, 2026 · Supports Funding round
“Total Amount Sold $61,476,510 USD”
4
DatabaseBuy and Sell Portal Space Systems Stock, $250M Valuation - Forge
Forge Global · Supports Funding round · post money valuation usd
“04/09/2026 Series A-1 $49.48M $10.87 $250M”
5
NewsPortal Space Systems Raises Staggering $17.5M Seed
Payload · Supports Funding round, Funding round · amount
“AlleyCorp led the round, which included additional participation from Mach33, FUSE, First In, TFX, Offline Ventures, and Atypical.”
6
NewsPortal Space Systems' $50M Series A
Exterra JSC · Supports Funding round · post money valuation usd
“closed a $50 million Series A in April 2026, valuing the company at $250 million”

People2

7
NewsPortal Space Systems - Wikipedia
en.wikipedia.org · Supports Role
“Portal Space Systems was founded in 2021 by Jeff Thornburg, a former propulsion executive at SpaceX and Amazon Project Kuiper, alongside Ian Vorbach and Prashaanth Ravindran.”
8
CompanyPortal emerges from stealth with $3M DoD Funding
Portal Space Systems · Supports Role
“"We are proud to develop solutions that enhance our nation's space capabilities by building in constant collaboration with our government partners," said Ian Vorbach, COO of Portal Space Systems.”

Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.