Third Sphere
Built from this firm's Form D filings. The firm files no SEC adviser report.
- Website
- https://thirdsphere.com
- HQ
- CA
Third Sphere is a climate-focused early-stage investor that backs founders building hardware-enabled solutions, usually with software components that address climate challenges. Its team includes Stonly Baptiste Blue, Yana Andrea Klimova, Shaun Abrahamson, Miela Mayer, Shilpi Kumar, and Roscel Asuncion. Listed portfolio companies include Arbor, Blocpower, Blueprint, ChargeLab, Domatic, and Urbio.
New fund likely raising soon
The firm's newest fund is 4 to 7 years past its first sale and no newer Form D has been filed.
01 · Says / Does
| Tag | Says | Does |
|---|---|---|
| Stages | Pre-seed, Seed | Not enough dated deals |
| Sectors | Climate hardware, Energy, Hardware | Not enough dated deals |
| Regions | US | Not enough dated deals |
Says: what the firm's funds state. Does: from 0 dated deals in the last 24 months.
02 · Fund history
| Fund | Year | Size | Status |
|---|---|---|---|
| THIRD SPHERE FUND IV-A, LP Third Sphere is a climate-focused early-stage venture investor backing hardware-enabled solutions, usually with software components, that address climate challenges through mitigation, mostly electrification, and resilience and adaptation. Inferred from the firm's website | 2022 | $2.9M to $100M (Form D) | Late investment period |
| THIRD SPHERE FUND IV, LP Third Sphere is a climate-focused early-stage venture investor backing hardware-enabled solutions, usually with software components, that address climate challenges through mitigation, mostly electrification, and resilience and adaptation. Inferred from the firm's website | 2022 | $9.88M to $100M (Form D) | Late investment period |
03 · People across funds
- SHAUN ABRAHAMSON, MANAGING PARTNER
THIRD SPHERE FUND IV-A, LP (Named on Form D); THIRD SPHERE FUND IV, LP (Named on Form D)
- SHILPI KUMAR, PARTNER
THIRD SPHERE FUND IV-A, LP (Named on Form D); THIRD SPHERE FUND IV, LP (Named on Form D)
- STONLY BLUE, PARTNER
THIRD SPHERE FUND IV-A, LP (Named on Form D); THIRD SPHERE FUND IV, LP (Named on Form D)
- Miela Mayer
THIRD SPHERE FUND IV-A, LP (Team); THIRD SPHERE FUND IV, LP (Team)
- Roscel Asuncion
THIRD SPHERE FUND IV-A, LP (Team); THIRD SPHERE FUND IV, LP (Team)
- Stonly Baptiste Blue
THIRD SPHERE FUND IV-A, LP (Team); THIRD SPHERE FUND IV, LP (Team)
- Yana Andrea Klimova
THIRD SPHERE FUND IV-A, LP (Team); THIRD SPHERE FUND IV, LP (Team)
04 · Recent deals
No dated deals found yet.
05 · Latest from the firm
No news from the firm's website yet.
06 · Sources
- https://thirdsphere.com
- https://thirdsphere.com/about/
- https://thirdsphere.com/portfolio/affordable-clean-energy/
Fund dates and sizes are from SEC Form D filings.
Last verified: Oct 28, 2026