VC firm

Third Sphere

Kingmaker Tier

Kingmaker Tier: 92 out of 100

Also known as THIRD SPHERE FUND IV A, THIRD SPHERE FUND IV, LP, THIRD SPHERE FUND IV-A, LP

Investor type: VC
Investing status: Activeas of 2026-09-18Source (opens in a new tab)
Headquarters: LOS ANGELES, CA, United States
Founded: 2013
Latest fund size: $9.9MSEC amount sold, as of 2022-05-20Source (opens in a new tab)
Funds: 2
Check size: typically initially investing $250,000 to $1 millionSource (opens in a new tab)

Record updated 27 September 2026

About

We’re a climate-focused venture fund that’s been helping shape the landscape of early-stage climate investing for over a decade.

Thesis: We’re a climate-focused venture fund that’s been helping shape the landscape of early-stage climate investing for over a decade. With nearly 100 portfolio companies, we’ve built a thesis and approach that tackles climate change from unconventional angles—about two-thirds focused on mitigation, mostly via electrification, and one-third on resilience and adaptation. We like techno-economic assumptions that lead to better, faster and cheaper offerings. This means we don’t chase the latest hype cycles or stick to comfortable enterprise SaaS opportunities; we’re obsessed with transforming human systems to better align with planetary systems while generating massive returns.Source (opens in a new tab)
Reserves policy: For companies proving our thesis, we double down in follow-on rounds.
Eligibility: Founders working on climate-positive solutions who are willing to go all-in on using AI to minimize burn and achieve 10x faster outcomes.
Investing status notes: If you’re a startup responding to our call for startups, or otherwise seeking funding, you’re in the right place.

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