--- title: "29 Series B Energy Investors in the US (Nov 2026)" last_updated: "2026-11-06" rows: "29" free_rows: "14" source: "SEC Form D filings and our own research" canonical: "https://theinvestordatabase.com/lists/series-b-energy-investors-us/" --- # 29 Series B energy investors in the US We list 29 Series B energy investors in the US as of November 2026: 27 have an SEC filing on file and 2 were checked on the firm's own website or an official register, and the list was last checked on 6 Nov 2026. The cities with the most head offices on this list are San Francisco (4), New York (4) and Boston (2). - 29 investors - 19 with a fund filing or dated deal in the last 12 months - $111M median fund size on file (SEC Form D, 22 firms) - 181 named decision-makers on file ## First 14 of 29 Series B energy investors in the US | Investor | Type | HQ | Stages (our research) | Focus (our research) | Latest fund or deal | Fund size | Checked | Profile | |---|---|---|---|---|---|---|---|---| | Energy Impact Partners | VC firm | United States (London office) | Seed, Series A, Series B, Growth | Energy, Climate Tech, AI, Cybersecurity | Portfolio news, Nov 2026 | $4.5B (own site) | 2026-11-05 | https://theinvestordatabase.com/investors/energy-impact-partners/ | | Bison Ventures | VC firm | San Francisco, CA | Pre-seed, Seed, Series A, Series B | Energy, AI, Healthtech, Biotech | New fund, Oct 2026 | $160M (SEC Form D, 2025) | 2026-11-04 | https://theinvestordatabase.com/investors/bison-ventures/ | | G2 Venture Partners | VC firm | Portola Valley, CA | Series B, Growth | Energy, AI, Industrial Tech, Mobility | New deal, Aug 2026 | $53M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/g2-venture-partners/ | | Massive VC | VC firm | Boulder, CO | Seed, Series A, Series B | Energy, Space, AI, Cybersecurity | New fund, May 2026 | $30M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/massive-vc/ | | Westly Capital Partners | VC firm | Menlo Park, CA | Pre-seed, Seed, Series A, Series B, Growth | Energy, AI, Industrial Tech, Cybersecurity | New fund, May 2026 | $500M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/westly-capital-partners/ | | Energize Ventures | VC firm | Chicago, IL | Series A, Series B, Growth, Any stage | Energy, AI, Industrial Tech, Climate Tech | New deal, Sep 2026 | $328M (SEC Form D, 2020) | 2026-11-05 | https://theinvestordatabase.com/investors/energize-ventures/ | | Earthshot Ventures | VC firm | San Francisco, CA | Pre-seed, Seed, Series A, Series B | Energy, AI, Industrial Tech, Proptech | New fund, Oct 2026 | $77M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/earthshot-ventures/ | | Infinite | VC firm | West Palm Beach, FL | Pre-seed, Seed, Series A, Series B, Growth | Energy, AI, Deep Tech, Crypto and Web3 | New fund, Oct 2026 | $100M (SEC Form D, 2026) | 2026-11-05 | https://theinvestordatabase.com/investors/infinite/ | | Cerberus Ventures | VC firm | New York, NY | Pre-seed, Seed, Series A, Series B | Energy, AI, Industrial Tech, Quantum | New fund, Jun 2026 | $75M (SEC Form D, 2024) | 2026-11-04 | https://theinvestordatabase.com/investors/cerberus-ventures/ | | Overlap Holdings | VC firm | Hicksville, NY | Seed, Series A, Series B | Energy, AI, Climate Tech, Healthtech | New fund, Oct 2026 | $16M (SEC Form D, 2023) | 2026-11-04 | https://theinvestordatabase.com/investors/overlap-holdings/ | | SV Angel | VC firm | San Francisco, CA | Seed, Series B, Growth | Energy, AI, Consumer, Crypto and Web3 | New fund, Jun 2026 | $575M (SEC Form D, 2025) | 2026-11-04 | https://theinvestordatabase.com/investors/sv-angel/ | | B Capital | VC firm | Manhattan Beach, CA | Seed, Series A, Series B, Growth | Energy, AI, Fintech, Healthtech | New fund, Jul 2025 | $307M (SEC Form D, 2023) | 2026-11-04 | https://theinvestordatabase.com/investors/b-capital/ | | Isogon Ventures | VC firm | New York, NY | Seed, Series A, Series B | Energy, AI, Logistics, Industrial Tech | New deal, Jul 2026 | $150M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/isogon-ventures/ | | HG Ventures | Corporate VC | Indianapolis, IN | Seed, Series A, Series B, Growth | Energy, Industrial Tech, AI, Proptech | Portfolio news, Apr 2026 | | 2026-11-04 | https://theinvestordatabase.com/investors/hg-ventures/ | You are seeing 14 of 29. The full list adds 15 more investors and 181 named decision-makers. Get all 29 investors and 181 named contacts, $49, one-time: https://theinvestordatabase.com/buy/list/series-b-energy-investors-us This page: https://theinvestordatabase.com/lists/series-b-energy-investors-us/ ## Method and limits - Source: 27 of the 29 rows carry an SEC filing (Form D or Form ADV). All 29 have a website we checked. Filing date and fund size are SEC data where a filing exists. Stage, sector and check size are our research. - Inclusion rule: Organizations that back startups. Individuals, buyout funds and firms we found to be inactive are left out. Sector: the firm states energy as a focus on its own site, or we observed it in the firm's portfolio. Stage: the firm states that it invests at Series B. - Order: 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 Series B 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. - Fill rates: Of 29 rows: stage 29, sector 29, fund size 26, website 29. In the paid file: named decision-makers on 28 rows, firm email on 12, LinkedIn page on 21, check size on 4. ## Questions ### How many Series B energy investors in the US are there? We list 29 as of November 2026. 19 of the 29 have a fund filing or a dated deal in the last 12 months. The cities with the most are San Francisco (4), New York (4) and Boston (2). ### Which Series B energy investors in the US raised a new fund in the last 12 months? 15 of the 29 have a fund filing dated in the last 12 months. The most recent on this list are Bison Ventures (Oct 2026), Overlap Holdings (Oct 2026) and Earthshot Ventures (Oct 2026). ### What is the typical fund size of Series B energy investors in the US? The median fund size on file for this list is $111M, across the 22 firms with a size on an SEC Form D. The fund on file is each firm's main fund, which is not always its newest. The other 7 do not disclose a size there. ### How do I contact Series B energy investors in the US? The paid file holds 181 named decision-makers across 28 of these 29 and a firm email for 12. We publish the address a firm lists itself, never a personal email. Each free row links to a profile with the firm's website. ### Where does the data on Series B energy investors in the US come from? 27 of the 29 rows have an SEC filing on file (Form D or Form ADV) and 2 were checked on the firm's own website or an official register. Filing date and fund size come from the filing. Stage, sector and check size are our research. Rows on this list were last checked on 6 Nov 2026 at the latest. The whole file is re-verified twice a year.