Rhea Space Activity key facts
- Developer of astrophysics technology designed to support national security objectives.
- It has raised $12.8M; the latest was Later Stage VC ($6.0M) in Apr 2026.
- Notable investors include Seraphim Space, National Aeronautics and Space Administration, Ligo Partners, The Catalyst Accelerator, New Mexico Vintage Fund — 17 tracked in total.
- Status: Privately Held (backing).
Who backs Rhea Space Activity
17+- ·The complete investor list: 17 names
- ·Watch Rhea Space Activity: the Monday email on marks, rounds and moves
Rhea Space Activity funding rounds
No funding rounds for Rhea Space Activity are on record yet — either the company hasn't raised institutional capital, or the raise hasn't surfaced in our sources.
Rhea Space Activity investors
17 investors are on record for Rhea Space Activity, including Seraphim Space, National Aeronautics and Space Administration, Ligo Partners and The Catalyst Accelerator.
About Rhea Space Activity
Developer of astrophysics technology designed to support national security objectives. The company develops a range of technologies across infrared satellites, directed energy, artificial intelligence, astroparticle physics, small satellites, autonomous underwater vehicles, and more, enabling governments and defense forces to fulfill their security objectives.
- Sector
- Business Products and Services (B2B)
- HQ
- Washington, DC, United States
- Founded
- 2018
- Employees
- 21
- Website
- rheaspaceactivity.com/
- Ownership
- Privately Held (backing)
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Rhea Space Activity doesn't have a valuation on record yet — one is published once a priced round, a reported valuation, fund marks, or secondary prints surface in our sources. The rest of the record below builds toward it.