55 Series B energy investors

Top 5 Series B energy investors, 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 (35: full marks within 3 months, then stepping down at 6, 12 and 24 months), share of the observed portfolio in this sector (25; half of that when the sector is stated only), stage focus (15: all of it when Series B is the only stage the firm states, split evenly when it states more), size of the fund on file on a log scale (15) and completeness of the public record (10). Stage focus is 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. Cathay Innovation

   Type: VC firm · HQ: Paris, France · Stages: Seed, Series A, Series B, Growth, Late stage · Focus: Energy, AI, Robotics, Fintech · Latest activity: Portfolio news, Aug 2026 · Fund size or assets: €2.5B (own site)

   Portfolio news dated Aug 2026; €2.5B on file (own site); states energy as a focus; backs seed, Series A, Series B; 5 named decision-makers on file.

2. Energy Impact Partners

   Type: VC firm · HQ: United States (London office) · Stages: Seed, Series A, Series B, Growth · Focus: Energy, Climate Tech, 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); states energy as a focus; backs seed, Series A, Series B; 8 named decision-makers on file.

3. Parkwalk Advisors

   Type: SEIS/EIS fund · HQ: London, United Kingdom · Stages: Seed, Series A, Series B, Growth · Focus: Energy, Healthtech, AI, Industrial Tech · Latest activity: New fund, Sep 2026 · Fund size or assets: £500M (own site)

   Latest fund filing dated Sep 2026; £500M on file (own site); states energy as a focus; backs seed, Series A, Series B; 8 named decision-makers on file.

4. Bison Ventures

   Type: VC firm · HQ: San Francisco, CA · Stages: Pre-seed, Seed, Series A, Series B · Focus: Energy, AI, Healthtech, Biotech · Latest activity: New fund, Oct 2026 · Fund size on file: $160M (SEC Form D, 2025)

   Latest fund filing dated Oct 2026; $160M fund on file (SEC Form D, 2025); states energy as a focus; backs pre-seed, seed, Series A; 2 named decision-makers on file.

5. Energize Ventures

   Type: VC firm · HQ: Chicago, IL · Stages: Series A, Series B, Growth, Any stage · Focus: Energy, AI, Industrial Tech, Climate Tech · Latest activity: New deal, Sep 2026 · Fund size on file: $328M (SEC Form D, 2020)

   Dated new deal in Sep 2026; $328M fund on file (SEC Form D, 2020); states energy as a focus; backs Series A, Series B, growth-stage; 8 named decision-makers on file.

First 25 of 55 Series B energy investors

You are seeing 25 of 55. The full list adds 30 more investors and 283 named decision-makers.

How these 55 break down

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