---
title: "55 Series B Energy Investors (Nov 2026)"
last_updated: "2026-11-09"
rows: "55"
free_rows: "25"
source: "SEC Form D filings and our own research"
canonical: "https://theinvestordatabase.com/lists/series-b-energy-investors/"
---

# 55 Series B energy investors

We list 55 Series B energy investors as of November 2026: 28 have an SEC filing on file and 27 were checked on the firm's own website or an official register, and the list was last checked on 9 Nov 2026. The states with the most are California (8), New York (5) and Illinois (2).

- 55 investors
- 31 with a fund filing or dated deal in the last 12 months
- $100M median fund size on file (SEC Form D, 23 firms)
- 283 named decision-makers on file

## First 25 of 55 Series B energy investors

| Investor | Type | HQ | Stages (our research) | Focus (our research) | Latest fund or deal | Fund size | Checked | Profile |
|---|---|---|---|---|---|---|---|---|
| Cathay Innovation | VC firm | Paris, France | Seed, Series A, Series B, Growth, Late stage | Energy, AI, Robotics, Fintech | Portfolio news, Aug 2026 | €2.5B (own site) | 2026-11-07 | https://theinvestordatabase.com/investors/cathay-innovation/ |
| 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/ |
| Parkwalk Advisors | SEIS/EIS fund | London, United Kingdom | Seed, Series A, Series B, Growth | Energy, Healthtech, AI, Industrial Tech | New fund, Sep 2026 | £500M (own site) | 2026-11-04 | https://theinvestordatabase.com/investors/parkwalk/ |
| 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/ |
| 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/ |
| 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/ |
| 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/ |
| 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/ |
| ETF Partners | VC firm | London, United Kingdom | Series B, Growth | Energy, Fintech, Climate Tech, Quantum | New deal, Oct 2026 |  | 2026-11-04 | https://theinvestordatabase.com/investors/etf-partners/ |
| 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/ |
| Systemiq Capital | VC firm | London, United Kingdom | Seed, Series A, Series B | Energy, AI, Climate Tech, Mobility | Portfolio news, Sep 2026 |  | 2026-11-05 | https://theinvestordatabase.com/investors/systemiq-capital/ |
| 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/ |
| Valia Ventures | VC firm | London, United Kingdom | Pre-seed, Seed, Series A, Series B, Growth | Energy, AI, Healthtech, Generalist | Portfolio news, Aug 2026 | $50M (SEC Form D, 2022) | 2026-11-05 | https://theinvestordatabase.com/investors/valia-ventures/ |
| 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/ |
| New System Ventures | VC firm | New York, NY | Pre-seed, Seed, Series A, Series B | Energy, Fintech, Industrial Tech, Climate Tech | New deal, Aug 2026 | $30M (SEC Form D, 2023) | 2026-11-04 | https://theinvestordatabase.com/investors/new-system-ventures/ |
| Partech | VC firm | Paris, France | Seed, Series A, Series B, Growth | Energy, Climate Tech, Industrial Tech, SaaS | Portfolio news, Oct 2026 |  | 2026-11-04 | https://theinvestordatabase.com/investors/partech/ |
| Novastar Ventures | VC firm | London, United Kingdom | Seed, Series A, Series B, Growth | Energy, Climate Tech, Logistics, Agritech | New fund, May 2026 | $350M (own site) | 2026-11-05 | https://theinvestordatabase.com/investors/novastar-ventures/ |
| Sandwater | VC firm | Oslo, Norway | Seed, Series A, Series B | Energy, Industrial Tech, Climate Tech, Healthtech | New fund, Dec 2025 | €125M (own site) | 2026-11-07 | https://theinvestordatabase.com/investors/sandwater-as/ |
| Future Energy Ventures | Corporate VC | Essen, Germany | Series A, Series B, Growth | Energy, Climate Tech, AI, Mobility | New deal, Jul 2026 |  | 2026-11-07 | https://theinvestordatabase.com/investors/future-energy-ventures-management-gmbh/ |
| Wind | VC firm | Paris, France | Pre-seed, Seed, Series A, Series B | Energy, Deep Tech, Climate Tech, Defense Tech | New deal, May 2026 |  | 2026-11-07 | https://theinvestordatabase.com/investors/wind-venture/ |
| FJ Labs | VC firm | New York, NY | Pre-seed, Seed, Series A, Series B, Growth | Energy, AI, Fintech, Insurtech | New fund, Mar 2026 | $122M (SEC Form D, 2021) | 2026-11-04 | https://theinvestordatabase.com/investors/fj-labs/ |
| Carnrite Ventures | VC firm | Houston, TX | Pre-seed, Seed, Series A, Series B | Energy, AI, Biotech, Healthtech | New fund, Mar 2026 | $25M (SEC Form D, 2023) | 2026-11-04 | https://theinvestordatabase.com/investors/carnrite-ventures/ |

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

Get all 55 investors and 283 named contacts, $49, one-time: https://theinvestordatabase.com/buy/list/series-b-energy-investors
This page: https://theinvestordatabase.com/lists/series-b-energy-investors/

## Method and limits
- Source: 28 of the 55 rows carry an SEC filing (Form D or Form ADV). All 55 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 (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.
- Fill rates: Of 55 rows: stage 55, sector 55, fund size 35, website 55. In the paid file: named decision-makers on 49 rows, firm email on 27, LinkedIn page on 37, check size on 14.

## Questions
### How many Series B energy investors are there?
We list 55 as of November 2026. 31 of the 55 have a fund filing or a dated deal in the last 12 months.

### Which Series B energy investors raised a new fund in the last 12 months?
16 of the 55 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?
The median fund size on file for this list is $100M, across the 23 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 32 do not disclose a size there.

### How do I contact Series B energy investors?
The paid file holds 283 named decision-makers across 49 of these 55 and a firm email for 27. 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 come from?
28 of the 55 rows have an SEC filing on file (Form D or Form ADV) and 27 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 9 Nov 2026 at the latest. The whole file is re-verified twice a year.