261 seed energy investors
We list 261 seed energy investors as of November 2026: 139 have an SEC filing on file and 122 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 (58), New York (17) and Massachusetts (11).
Top 5 seed 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 seed 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.
Safar Partners
Type: VC firm · HQ: Cambridge, MA · Stages: Seed · Focus: Energy, 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); states energy as a focus; backs seed; 3 named decision-makers on file.
OpenAI Startup Fund
Type: Corporate VC · HQ: San Francisco, CA · Stages: Seed · Focus: Energy, AI, Healthtech, Legal Tech · Latest activity: New fund, Aug 2026 · Fund size on file: $400M (SEC Form D, 2026)
Latest fund filing dated Aug 2026; $400M fund on file (SEC Form D, 2026); states energy as a focus; backs seed; 2 named decision-makers on file.
Future Ventures
Type: VC firm · HQ: Los Altos, CA · Stages: Seed · Focus: Energy, Healthtech, AI, Biotech · Latest activity: New fund, Oct 2026 · Fund size on file: $200M (SEC Form D, 2021)
Latest fund filing dated Oct 2026; $200M fund on file (SEC Form D, 2021); states energy as a focus; backs seed; 4 named decision-makers on file.
Construct Capital
Type: VC firm · HQ: Washington, DC · Stages: Seed · Focus: Energy, AI, Industrial Tech, Defense Tech · Latest activity: New deal, Aug 2026 · Fund size on file: $150M (SEC Form D, 2026)
Dated new deal in Aug 2026; $150M fund on file (SEC Form D, 2026); states energy as a focus; backs seed; 6 named decision-makers on file.
Building Ventures
Type: VC firm · HQ: Boston, MA · Stages: Seed · Focus: Energy, Proptech, AI, Climate Tech · 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); states energy as a focus; backs seed; 8 named decision-makers on file.
First 25 of 261 seed energy investors
| Investor | Type | HQ | Stagesour research | Focusour research | Latest fund or deal | Fund sizeas filed or stated | Checked | Contacts |
|---|---|---|---|---|---|---|---|---|
| Safar Partners | VC firm | Cambridge, MA | Seed | Energy, Healthtech, Industrial Tech, Biotech | New deal, Aug 2026 | $300M (SEC Form D, 2023) | 4 Nov 2026 | 3 names, firm email · Unlock |
| OpenAI Startup Fund | Corporate VC | San Francisco, CA | Seed | Energy, AI, Healthtech, Legal Tech | New fund, Aug 2026 | $400M (SEC Form D, 2026) | 4 Nov 2026 | 2 names, firm email · Unlock |
| Future Ventures | VC firm | Los Altos, CA | Seed | Energy, Healthtech, AI, Biotech | New fund, Oct 2026 | $200M (SEC Form D, 2021) | 4 Nov 2026 | 4 names · Unlock |
| Construct Capital | VC firm | Washington, DC | Seed | Energy, AI, Industrial Tech, Defense Tech | New deal, Aug 2026 | $150M (SEC Form D, 2026) | 4 Nov 2026 | 6 names · Unlock |
| Building Ventures | VC firm | Boston, MA | Seed | Energy, Proptech, AI, Climate Tech | New deal, Sep 2026 | $100M (SEC Form D, 2021) | 5 Nov 2026 | 8 names · Unlock |
| Green Angel Ventures | SEIS/EIS fund | London, United Kingdom | Seed | Energy, Climate Tech, Industrial Tech, Fintech | Portfolio news, Aug 2026 | £60M (own site) | 4 Nov 2026 | 8 names · Unlock |
| LMNT Ventures | VC firm | Mercer Island, WA | Seed | Energy, Proptech, Robotics, Mobility | New fund, Sep 2026 | $80M (SEC Form D, 2026) | 4 Nov 2026 | 8 names · Unlock |
| Reveille | VC firm | New York, NY | Seed | Energy, Defense Tech, Space, AI | New fund, Nov 2026 | $40M (SEC Form D, 2025) | 4 Nov 2026 | 3 names, firm email · Unlock |
| Light Ray Ventures | VC firm | New York, NY | Seed | Energy, Robotics, Industrial Tech, Climate Tech | New deal, Oct 2026 | $21M (SEC Form D, 2023) | 5 Nov 2026 | 3 names, firm email · Unlock |
| K Street Capital | VC firm | Richmond, VA | Seed | Energy, Fintech, AI, Healthtech | New fund, Sep 2026 | $20M (SEC Form D, 2026) | 4 Nov 2026 | 4 names, firm email · Unlock |
| Toyota Ventures | Corporate VC | Los Altos, CA | Seed, Series A | Energy, AI, Climate Tech, Industrial Tech | Portfolio news, Oct 2026 | $928M (SEC Form ADV) | 5 Nov 2026 | LinkedIn page · Unlock |
| 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) | 4 Nov 2026 | 8 names · Unlock |
| Initialized | VC firm | San Francisco, CA | Pre-seed, Seed | Energy, AI, Generalist, Fintech | New fund, Sep 2026 | $520M (SEC Form D, 2021) | 4 Nov 2026 | 8 names · Unlock |
| Extantia | VC firm | Berlin, Germany | Seed, Series A | Energy, Climate Tech, Industrial Tech, Agritech | New deal, Aug 2026 | €204M (own site) | 4 Nov 2026 | 8 names, firm email · Unlock |
| 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) | 4 Nov 2026 | 8 names, firm email · Unlock |
| Rubio Impact Ventures | VC firm | Amsterdam, Netherlands | Seed, Series A | Energy, Impact, Climate Tech, Food and Beverage | New fund, Sep 2026 | €226M (own site) | 7 Nov 2026 | firm email · Unlock |
| Hallstone Ventures | VC firm | Hollywood, CA | Seed | Energy, Space, Robotics, Media | New fund, Oct 2026 | $11M (SEC Form D, 2025) | 4 Nov 2026 | 5 names · Unlock |
| New Stack | VC firm | Chicago, IL | Pre-seed, Seed | Energy, AI, Fintech, Healthtech | New fund, Sep 2026 | $125M (SEC Form D, 2024) | 4 Nov 2026 | 3 names · Unlock |
| Adara Ventures | VC firm | Madrid, Spain | Seed, Series A, Growth | Energy, Deep Tech, AI, Cybersecurity | New deal, Oct 2026 | €350M (own site) | 7 Nov 2026 | 5 names, firm email · Unlock |
| M13 | VC firm | Los Angeles, CA | Seed, Series A | Energy, AI, Healthtech, Ecommerce | New fund, Sep 2026 | $400M (SEC Form D, 2021) | 4 Nov 2026 | 8 names · Unlock |
| Défense Angels | Angel network | Paris, France | Seed | Energy, Deep Tech, Defense Tech, Space | Portfolio news, Nov 2026 | €3M (own site) | 7 Nov 2026 | 5 names, firm email · Unlock |
| 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) | 7 Nov 2026 | 5 names, firm email · Unlock |
| 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) | 5 Nov 2026 | 8 names · Unlock |
| 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) | 5 Nov 2026 | 8 names · Unlock |
| Scout Ventures | VC firm | Austin, TX | Seed | Energy, Defense Tech, AI, Deep Tech | New deal, May 2026 | $125M (SEC Form D, 2022) | 4 Nov 2026 | 8 names · Unlock |
You are seeing 25 of 261. The full list adds 236 more investors and 1,175 named decision-makers.
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How these 261 break down
By region
| Region | On this list | Share |
|---|---|---|
| United States | 140 | 54% |
| United Kingdom | 46 | 18% |
| Europe | 72 | 28% |
By US state
| US state | On this list | Share |
|---|---|---|
| California | 58 | 22% |
| New York | 17 | 7% |
| Massachusetts | 11 | 4% |
| Colorado | 7 | 3% |
| Florida | 7 | 3% |
| Texas | 5 | 2% |
| Illinois | 3 | 1% |
| Washington | 2 | 1% |
| Virginia | 2 | 1% |
| Maryland | 2 | 1% |
By European country
| European country | On this list | Share |
|---|---|---|
| France | 16 | 6% |
| Netherlands | 13 | 5% |
| Norway | 10 | 4% |
| Germany | 7 | 3% |
| Spain | 7 | 3% |
| Austria | 4 | 2% |
| Finland | 3 | 1% |
| Estonia | 3 | 1% |
By type
| Type | On this list | Share |
|---|---|---|
| VC firm | 197 | 75% |
| Corporate VC | 19 | 7% |
| Government or university fund | 13 | 5% |
| SEIS/EIS fund | 9 | 3% |
| Accelerator | 7 | 3% |
| Angel network | 6 | 2% |
Method and limits
- Source
- 139 of the 261 rows carry an SEC filing (Form D or Form ADV). All 261 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 seed.
- Order
- Firms with a published profile come first. 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 seed 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.
- Last refreshed
- November 2026. Rows on this list were checked between 4 Nov 2026 and 9 Nov 2026.
- Fill rates
- Of 261 rows: stage 261, sector 261, fund size 144, website 261. In the paid file: named decision-makers on 239 rows, firm email on 115, LinkedIn page on 162, check size on 67.
- Corrections
- Email hello@theinvestordatabase.com or use the update form. We act within 5 working days.
Questions
How many seed energy investors are there?
We list 261 as of November 2026. 136 of the 261 have a fund filing or a dated deal in the last 12 months.
Which seed energy investors raised a new fund in the last 12 months?
70 of the 261 have a fund filing dated in the last 12 months. The most recent on this list are Reveille (Nov 2026), Future Ventures (Oct 2026) and Tyche Partners VEIR (Oct 2026).
What is the typical fund size of seed energy investors?
The median fund size on file for this list is $75M, across the 102 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 159 do not disclose a size there.
How do I contact seed energy investors?
The paid file holds 1,175 named decision-makers across 239 of these 261 and a firm email for 115. 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 seed energy investors come from?
139 of the 261 rows have an SEC filing on file (Form D or Form ADV) and 122 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.
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