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.

Third Sphere targets pre-seed and seed rounds, with occasional follow-on investments into Series A and later stages. The firm typically leads or co-leads early rounds, with initial checks ranging from several hundred thousand dollars to a few million dollars.

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.

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.

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.