At a Glance
Helium-3 Ventures is a specialized venture capital firm focusing on deep technology investments across aerospace, defense, and frontier technologies. Led by partner Matthew Bellamy, the firm positions itself at the intersection of cutting-edge scientific advancement and commercial viability.
The firm's investment thesis centers on backing companies developing breakthrough technologies in aerospace and defense sectors, along with other deep tech verticals. Their approach spans multiple stages from pre-seed through Series B+, indicating a willingness to support portfolio companies through extended development cycles typical of deep tech ventures. While specific portfolio companies and fund details remain private, Helium-3 Ventures appears to target the growing market for dual-use technologies that can serve both commercial and defense applications, reflecting the increasing convergence between these traditionally separate sectors.
“Focuses on deep technology investments across aerospace, defense, and frontier technologies with partner Matthew Bellamy.”
Helium-3 Ventures Fund I, LP is the firm's only vehicle on file with the SEC. It was organized in Delaware in 2021 and filed its Form D on September 29, 2021 from 295 Madison Avenue in Manhattan. The notice elects an indefinite offering amount rather than a stated target and reported that the first sale had yet to occur; no amended filing disclosing an amount sold has followed, so the fund's size is not public. David Hendrickson is the only natural person listed as an executive officer, alongside Helium-3 Ventures Fund I GP, LP as general partner and Helium-3 Ventures Management Company, LLC as manager.
The portfolio now runs to roughly 35 companies with founding dates clustered between 2021 and 2024, weighted toward space, energy and hard-tech hardware: Astranis, Boom Supersonic, Stoke Space, Spaceforge, General Fusion, Quaise Energy, Sage Geosystems, Quidnet Energy, Figure AI, Machina Labs, Engineered Arts and Span, with software and consumer positions including Exa, Rho, Cart.com, Teamworks, Tixr and Pair Eyewear.
Helium-3 Ventures primarily invests at the Pre-Seed, Seed, Series A, Series B+ stages. This means they focus on companies that are at the earliest idea or prototype phase.
Helium-3 Ventures is headquartered in New York, NY. Many of their portfolio companies are also based in this region, though they invest across geographies.
Helium-3 Ventures focuses on investments in Aerospace & Defense, Deeptech, Other, Consumer, Fintech. Their portfolio reflects deep expertise and networks within these sectors.
Helium-3 Ventures's typical investment check size ranges from $. to $.. Actual amounts may vary based on the stage, sector, and specific opportunity.
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