---
title: "139 Series A Energy Investors (Nov 2026)"
last_updated: "2026-11-09"
rows: "139"
free_rows: "25"
source: "SEC Form D filings and our own research"
canonical: "https://theinvestordatabase.com/lists/series-a-energy-investors/"
---

# 139 Series A energy investors

We list 139 Series A energy investors as of November 2026: 59 have an SEC filing on file and 80 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 (19), New York (9) and Colorado (6).

- 139 investors
- 73 with a fund filing or dated deal in the last 12 months
- $75M median fund size on file (SEC Form D, 45 firms)
- 644 named decision-makers on file

## First 25 of 139 Series A energy investors

| Investor | Type | HQ | Stages (our research) | Focus (our research) | Latest fund or deal | Fund size | Checked | Profile |
|---|---|---|---|---|---|---|---|---|
| Toyota Ventures | Corporate VC | Los Altos, CA | Seed, Series A | Energy, AI, Climate Tech, Industrial Tech | Portfolio news, Oct 2026 | $928M (SEC Form ADV) | 2026-11-05 | https://theinvestordatabase.com/investors/toyota-ventures/ |
| At One Ventures | VC firm | Menlo Park, CA | Seed, Series A | Energy, Climate Tech, Agritech, Industrial Tech | New deal, Sep 2026 | $375M (SEC Form D, 2022) | 2026-11-04 | https://theinvestordatabase.com/investors/at-one-ventures/ |
| Extantia | VC firm | Berlin, Germany | Seed, Series A | Energy, Climate Tech, Industrial Tech, Agritech | New deal, Aug 2026 | €204M (own site) | 2026-11-04 | https://theinvestordatabase.com/investors/extantia/ |
| Electric Capital | VC firm | Palo Alto, CA | Pre-seed, Seed, Series A | Energy, Crypto and Web3, AI, Fintech | New fund, Sep 2026 | $532M (SEC Form D, 2021) | 2026-11-04 | https://theinvestordatabase.com/investors/electric-capital/ |
| Rubio Impact Ventures | VC firm | Amsterdam, Netherlands | Seed, Series A | Energy, Impact, Climate Tech, Food and Beverage | New fund, Sep 2026 | €226M (own site) | 2026-11-07 | https://theinvestordatabase.com/investors/rubio-fund-management-b-v/ |
| Adara Ventures | VC firm | Madrid, Spain | Seed, Series A, Growth | Energy, Deep Tech, AI, Cybersecurity | New deal, Oct 2026 | €350M (own site) | 2026-11-07 | https://theinvestordatabase.com/investors/adara-ventures-sgeic-s-a/ |
| M13 | VC firm | Los Angeles, CA | Seed, Series A | Energy, AI, Healthtech, Ecommerce | New fund, Sep 2026 | $400M (SEC Form D, 2021) | 2026-11-04 | https://theinvestordatabase.com/investors/m13/ |
| 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/ |
| Aramco Ventures | Corporate VC | Saudi Arabia (London office) | Seed, Series A, Growth, Late stage | Energy, Climate Tech, Industrial Tech, AI | Portfolio news, Sep 2026 | $7.5B (own site) | 2026-11-05 | https://theinvestordatabase.com/investors/aramco-ventures/ |
| 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/ |
| Aurelia Foundry | VC firm | Denver, CO | Seed, Series A | Energy, Space, Mobility, Climate Tech | New fund, Oct 2026 | $75M (SEC Form D, 2023) | 2026-11-04 | https://theinvestordatabase.com/investors/aurelia-foundry/ |
| 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/ |
| First Imagine! | VC firm | London, United Kingdom | Series A | Energy, AI, Industrial Tech, Climate Tech | New deal, Oct 2026 |  | 2026-11-05 | https://theinvestordatabase.com/investors/first-imagine-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/ |
| Longrun Capital | VC firm | San Francisco, CA | Seed, Series A | Energy, Climate Tech, Industrial Tech, AI | New deal, Sep 2026 | $22M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/longrun-capital/ |
| 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/ |
| Clean Energy Ventures | VC firm | Boston, MA | Seed, Series A | Energy, Climate Tech, Fintech, Deep Tech | New deal, May 2026 | $306M (SEC Form D, 2022) | 2026-11-05 | https://theinvestordatabase.com/investors/clean-energy-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/ |
| Blackhorn Ventures | VC firm | Denver, CO | Seed, Series A | Energy, AI, Developer Tools, Industrial Tech | New deal, Jul 2026 | $250M (SEC Form D, 2022) | 2026-11-04 | https://theinvestordatabase.com/investors/blackhorn-ventures/ |
| Cherry Ventures | VC firm | London, United Kingdom | Pre-seed, Seed, Series A | Energy, Generalist, AI, SaaS | New deal, Sep 2026 | $5M (SEC Form D, 2025) | 2026-11-04 | https://theinvestordatabase.com/investors/cherry-ventures/ |
| Union Square Ventures | VC firm | New York, NY | Seed, Series A | Energy, AI, Generalist, Robotics | New deal, Oct 2026 | $3M (SEC Form D, 2026) | 2026-11-04 | https://theinvestordatabase.com/investors/union-square-ventures/ |
| Emerald Technology Ventures | VC firm | Zurich, Switzerland | Series A, Growth | Energy, Climate Tech, Deep Tech, AI | New deal, Jun 2026 | €100M (own site) | 2026-11-07 | https://theinvestordatabase.com/investors/emerald-technology-ventures-ag/ |
| 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/ |

You are seeing 25 of 139. The full list adds 114 more investors and 644 named decision-makers.

Get all 139 investors and 644 named contacts, $49, one-time: https://theinvestordatabase.com/buy/list/series-a-energy-investors
This page: https://theinvestordatabase.com/lists/series-a-energy-investors/

## Method and limits
- Source: 59 of the 139 rows carry an SEC filing (Form D or Form ADV). All 139 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 A.
- 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 A 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 139 rows: stage 139, sector 139, fund size 76, website 139. In the paid file: named decision-makers on 124 rows, firm email on 75, LinkedIn page on 94, check size on 43.

## Questions
### How many Series A energy investors are there?
We list 139 as of November 2026. 73 of the 139 have a fund filing or a dated deal in the last 12 months.

### Which Series A energy investors raised a new fund in the last 12 months?
25 of the 139 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 A energy investors?
The median fund size on file for this list is $75M, across the 45 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 94 do not disclose a size there.

### How do I contact Series A energy investors?
The paid file holds 644 named decision-makers across 124 of these 139 and a firm email for 75. 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 A energy investors come from?
59 of the 139 rows have an SEC filing on file (Form D or Form ADV) and 80 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.