# Third Sphere

Third Sphere is a Private Equity based in Santa Monica, United States.

## Overview

- **Organization type:** Private Equity
- **Headquarters:** Santa Monica, United States
- **Region:** North America
- **Address:** New York, NY, United States
- **Founded:** 2013
- **Assets under management:** Undisclosed
- **Website:** thirdsphere.com
- **LinkedIn:** https://www.linkedin.com/company/third-sphere

## Regulatory record

- **CRD number:** 301287
- **Registration status:** Registered
- **Reports private funds:** Yes
- **IAPD record:** https://adviserinfo.sec.gov/firm/summary/301287

## About

Third Sphere is a climate-focused venture fund that has helped shape early-stage climate investing for over a decade. With nearly 100 portfolio companies, about two-thirds of its thesis focuses on mitigation (mostly via electrification) and one-third on resilience and adaptation. It backs founders building hardware-enabled solutions (80% of the portfolio), usually with software components, and concentrates on pre-seed and seed stages with typical initial checks of $250,000 to $1 million.

## Sectors

- ClimateTech
- Energy Transition & Renewables
- Mobility & Transportation
- Real Estate
- AI/ML

## People

- Shaun Abrahamson — Managing Partner
- Stonly Baptiste — Managing Partner
- Tim He — Managing Partner

## Questions

### Who runs investment decisions at Third Sphere?

Managing partners Shaun Abrahamson, Stonly Baptiste, and Tim He jointly lead investment decisions. All three have been with the firm since its founding as Urban.Us in 2013. The firm has not disclosed additional investment partners or an investment committee beyond the three managing partners.

### How is Third Sphere different from a generalist seed fund?

Third Sphere applies a thematic lens that demands fluency in physical-world systems — building codes, grid interconnection, urban land-use regulation — alongside typical software diligence. The partnership has been working at this intersection since 2013, giving it a sourcing network and technical due-diligence capability that pure software funds rarely build.

### Which sectors does Third Sphere explicitly avoid?

Third Sphere's published focus is exclusively on climate technology, specifically the intersection of digital solutions with energy, mobility, industrial systems, and the built environment. The firm does not invest in pure software-as-a-service companies without a physical-world emissions impact pathway, nor in consumer internet, fintech, biotech, or media.

### Does Third Sphere participate in fund commitments or only direct deals?

Third Sphere operates as a direct venture investor and does not publicly disclose a fund-of-funds or LP commitment strategy. Its model is to lead or co-lead equity rounds in early-stage companies, with reserve capital for follow-on investments.

## Related profiles

- [Third Rome Investment Solutions](https://altss.com/profile/third-rome-investment-solutions)
- [Thirdstream Partners](https://altss.com/profile/thirdstream-partners)

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Last updated: 2026-08-11T15:08:18.003Z

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