140 seed energy investors in the US
We list 140 seed energy investors in the US as of November 2026: 137 have an SEC filing on file and 3 were checked on the firm's own website or an official register, and the list was last checked on 7 Nov 2026. The cities with the most head offices on this list are San Francisco (17), New York (16) and Boston (6).
Top 5 seed energy investors in the US, 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 (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 seed 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. 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; names the US as where it invests; 3 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; names the US as where it invests; 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; names the US as where it invests; 8 named decision-makers on file.
Light Ray Ventures
Type: VC firm · HQ: New York, NY · Stages: Seed · Focus: Energy, Robotics, Industrial Tech, Climate Tech · Latest activity: New deal, Oct 2026 · Fund size on file: $21M (SEC Form D, 2023)
Dated new deal in Oct 2026; $21M fund on file (SEC Form D, 2023); states energy as a focus; backs seed; names the US as where it invests; 3 named decision-makers on file.
K Street Capital
Type: VC firm · HQ: Richmond, VA · Stages: Seed · Focus: Energy, Fintech, AI, Healthtech · Latest activity: New fund, Sep 2026 · Fund size on file: $20M (SEC Form D, 2026)
Latest fund filing dated Sep 2026; $20M fund on file (SEC Form D, 2026); states energy as a focus; backs seed; names the US as where it invests; 4 named decision-makers on file.
First 25 of 140 seed energy investors in the US
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Inflection | VC firm | Framingham, MA | Pre-seed, Seed | Energy, AI, Space, Defense Tech | New fund, Sep 2026 | $50M (SEC Form D, 2026) | 4 Nov 2026 | 3 names, firm email · 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 |
| 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) | 4 Nov 2026 | 2 names, firm email · Unlock |
| Brainstorm Ventures | VC firm | San Francisco, CA | Seed | Energy, AI, Fintech, Generalist | New fund, Jun 2026 | $25M (SEC Form D, 2026) | 4 Nov 2026 | 5 names · Unlock |
| Ecosphere Ventures | VC firm | Sugar Land, TX | Pre-seed, Seed | Energy, Climate Tech, Industrial Tech, Defense Tech | New fund, Sep 2026 | $10M (SEC Form D, 2026) | 4 Nov 2026 | 8 names · 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 |
| Union Square Ventures | VC firm | New York, NY | Seed, Series A | Energy, AI, Generalist, Robotics | New deal, Oct 2026 | $3M (SEC Form D, 2026) | 4 Nov 2026 | 8 names · 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 |
| Commonweal Ventures | VC firm | New York, NY | Pre-seed, Seed | Energy, AI, Legal Tech, Fintech | New fund, Jul 2026 | $75M (SEC Form D, 2022) | 4 Nov 2026 | 5 names, firm email · Unlock |
| Phoenix Venture Partners | VC firm | San Mateo, CA | Seed | Energy, AI, Healthtech, Quantum | Portfolio news, Jul 2026 | $109M (SEC Form D, 2021) | 5 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 |
| Refactor Capital | VC firm | Burlingame, CA | Seed | Energy, AI, Healthtech, Biotech | New fund, May 2026 | $50M (SEC Form D, 2021) | 4 Nov 2026 | 3 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 |
| Atoms VC | VC firm | Chicago, IL | Seed | Energy, Proptech, Deep Tech, Healthtech | New fund, Feb 2026 | $25M (SEC Form D, 2026) | 4 Nov 2026 | 4 names · Unlock |
| Lichen Ventures | VC firm | Baltimore, MD | Seed | Energy, Climate Tech, Industrial Tech, Biotech | New fund, Jun 2026 | $20M (SEC Form D, 2025) | 4 Nov 2026 | 5 names · Unlock |
| Techsquare Ventures | VC firm | Atlanta, GA | Pre-seed, Seed, Series A | Energy, AI, Data, Cybersecurity | New fund, May 2026 | $49M (SEC Form D, 2025) | 4 Nov 2026 | 8 names, firm email · Unlock |
You are seeing 25 of 140. The full list adds 115 more investors and 716 named decision-makers.
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How these 140 break down
By US state
| US state | On this list | Share |
|---|---|---|
| California | 58 | 41% |
| New York | 17 | 12% |
| Massachusetts | 11 | 8% |
| Colorado | 7 | 5% |
| Florida | 7 | 5% |
| Texas | 5 | 4% |
| Illinois | 3 | 2% |
| Virginia | 2 | 1% |
| Washington | 2 | 1% |
| Maryland | 2 | 1% |
By type
| Type | On this list | Share |
|---|---|---|
| VC firm | 135 | 96% |
| Corporate VC | 4 | 3% |
Method and limits
- Source
- 137 of the 140 rows carry an SEC filing (Form D or Form ADV). All 140 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 (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 seed 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.
- Last refreshed
- November 2026. Rows on this list were checked between 4 Nov 2026 and 7 Nov 2026.
- Fill rates
- Of 140 rows: stage 140, sector 140, fund size 116, website 140. In the paid file: named decision-makers on 136 rows, firm email on 44, LinkedIn page on 74, check size on 14.
- Corrections
- Email [email protected] or use the update form. We act within 5 working days.
Questions
How many seed energy investors in the US are there?
We list 140 as of November 2026. 86 of the 140 have a fund filing or a dated deal in the last 12 months. The cities with the most are San Francisco (17), New York (16) and Boston (6).
Which seed energy investors in the US raised a new fund in the last 12 months?
68 of the 140 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 in the US?
The median fund size on file for this list is $75M, across the 100 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 40 do not disclose a size there.
How do I contact seed energy investors in the US?
The paid file holds 716 named decision-makers across 136 of these 140 and a firm email for 44. 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 in the US come from?
137 of the 140 rows have an SEC filing on file (Form D or Form ADV) and 3 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 7 Nov 2026 at the latest. The whole file is re-verified twice a year.
Broader lists
Energy venture capital firms in the US (249)Seed investors in the US (1,043)Seed energy investors (261)
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