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Analyse your fitInvestment thesis
Mach33 Financial Group is the Space Finance Group financing human expansion through a comprehensive suite of financial products and services dedicated exclusively to space. We are constructing the financial engine for the next generation of space infrastructure, built upon decades-long relationships. We firmly believe that this grand vision can only come to fruition when founded on trust and integrity. Our partners, investors, and operators all share a common vision of human expansion. We study expansion technologies poised to define the next era of human progress. Every investment we make is the direct result of that research. Mach33 is a physics-first, research-led investor. We test every claim through a concentric set of constraint envelopes. The physics envelope is the innermost. If the laws of nature do not permit it, we stop. Engineering, manufacturing, operations and reliability, and product market fit are each outer layers, tested in sequence.
Notable quotes
“Jeff's track record pioneering propulsion at SpaceX, Stratolaunch and [Amazon's Project] Kuiper gave us early confidence in Portal. But the team's rapid transformation of technical breakthroughs into staggering customer demand sealed our decision to double down this round.”
“We believe the same capital formation is required for the expansion of humanity…[and] our journey into the stars.”
“For investors evaluating SpaceX, I highly recommend seeing Starship launch. Don't delegate - go yourself. Forever changes one's perspective on this extraordinary company - and where humanity is headed. You'll have higher conviction to ride through the ups and downs…ultimately capturing stronger returns over time.”
Team
Recent investments
| Company | Round | Size | Date |
|---|---|---|---|
| Portal Space Systems | Series A | $50m | 2026-04 |
| Portal Space Systems | Seed | $18m | 2025 |
| Stoke Space | Series C | $260m | 2025-01 |
| Cosmic Shielding Corporation | Pre-seed | $1m | — |
| Orbital Composites | Unknown | — | — |
| Infinite Composites | Equity | $500k | — |
| Xairos | Unknown | — | — |
| Apptronik | Unknown | — | — |
| Interstellar Lab | Unknown | — | — |
| Relativity Space | Unknown | — | — |
Frequent co-investors
| VC firm | Deals together |
|---|---|
| AlleyCorp | 2 |
| FUSE | 2 |
| Geodesic Capital | 1 |
| ARK Invest | 1 |
| Booz Allen Ventures | 1 |
| SpaceFund | 1 |
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