162 seed climate tech investors in the US

Top 5 seed climate tech investors in the US, ranked by recent fund activity

Among firms with a published profile and a dated fund or deal in the last 24 months. The rule: Activity score out of 100: recency of the latest fund filing or dated deal (30: full marks within 3 months, then stepping down at 6, 12 and 24 months), share of the observed portfolio in this sector (20; half of that when the sector is stated only), stage focus (15: all of it when seed is the only stage the firm states, split evenly when it states more), stated focus on the US (15: full marks when the firm names the US as where it invests, half when it says global), size of the fund on file on a log scale (12) and completeness of the public record (8). Stage and regional focus are our research, not an SEC figure. It is a measure of activity and fit, not of quality or returns. The same rule orders the whole list; it is repeated in the method box.

1. Toyota Ventures

   Type: Corporate VC · HQ: Los Altos, CA · Stages: Seed, Series A · Focus: Climate Tech, AI, Energy, Industrial Tech · Latest activity: Portfolio news, Oct 2026 · Private fund assets: $928M (SEC Form ADV)

   Portfolio news dated Oct 2026; $928M on file (SEC Form ADV); 37% of its observed portfolio is climate tech; backs seed, Series A; names the US as where it invests.

2. Building Ventures

   Type: VC firm · HQ: Boston, MA · Stages: Seed · Focus: Climate Tech, Proptech, AI, Energy · Latest activity: New deal, Sep 2026 · Fund size on file: $100M (SEC Form D, 2021)

   Dated new deal in Sep 2026; $100M fund on file (SEC Form D, 2021); 26% of its observed portfolio is climate tech; backs seed; names the US as where it invests; 8 named decision-makers on file.

3. Light Ray Ventures

   Type: VC firm · HQ: New York, NY · Stages: Seed · Focus: Climate Tech, Robotics, Industrial Tech, Energy · Latest activity: New deal, Oct 2026 · Fund size on file: $21M (SEC Form D, 2023)

   Dated new deal in Oct 2026; $21M fund on file (SEC Form D, 2023); 29% of its observed portfolio is climate tech; backs seed; names the US as where it invests; 3 named decision-makers on file.

4. Energy Impact Partners

   Type: VC firm · HQ: United States (London office) · Stages: Seed, Series A, Series B, Growth · Focus: Climate Tech, Energy, AI, Cybersecurity · Latest activity: Portfolio news, Nov 2026 · Fund size or assets: $4.5B (own site)

   Portfolio news dated Nov 2026; $4.5B on file (own site); 40% of its observed portfolio is climate tech; backs seed, Series A, Series B; names the US as where it invests; 8 named decision-makers on file.

5. Safar Partners

   Type: VC firm · HQ: Cambridge, MA · Stages: Seed · Focus: Climate Tech, Healthtech, Industrial Tech, Biotech · Latest activity: New deal, Aug 2026 · Fund size on file: $300M (SEC Form D, 2023)

   Dated new deal in Aug 2026; $300M fund on file (SEC Form D, 2023); 10% of its observed portfolio is climate tech; backs seed; names the US as where it invests; 3 named decision-makers on file.

First 25 of 162 seed climate tech investors in the US

You are seeing 25 of 162. The full list adds 137 more investors and 837 named decision-makers.

How these 162 break down

Questions

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