Interlune Adds $5M SAFE for Lunar Helium-3 Mining Plans
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Interlune has raised another $5 million through a Simple Agreement for Future Equity. Both existing and new investors took part. The company used the same structure in early 2026 for an identical $5 million Seed raise.
Founded in 2020 and based in Seattle, Interlune started out focused on technologies for extracting valuable resources from lunar regolith.
Helium-3 is the target for this space company. The isotope is rare on Earth but present in significant quantities on the Moon, and its value can exceed $9 million per 500 grams. Interlune points to three areas where it matters: medical imaging systems, quantum computing, and future fusion energy.
The business plan has widened since the early days. Rather than sticking to resource extraction alone, the Washington company is now developing the infrastructure and life support systems needed to operate on the Moon, with an emphasis on using resources already present there.
In July the company expanded its partnership with US industrial equipment manufacturer Vermeer to build specialized construction equipment for lunar use, machinery expected to feature in NASA’s plans for building infrastructure on the Moon.
The first payload, a mineralogical mapping device, is scheduled to reach the Moon in 2026 aboard the Griffin-1 lander from Voyager Technologies. Later missions will survey helium-3 reserves and test soil extraction technology in practice. Interlune aims to begin mining helium-3 in the 2030s and to set up logistics for delivering it back to Earth.
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