27 Series B climate tech investors in the US
We list 27 Series B climate tech investors in the US as of November 2026: 25 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 5 Nov 2026. The cities with the most head offices on this list are San Francisco (3), New York (3) and Chicago (3).
Top 5 Series B climate tech 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 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. The same rule orders the whole list; it is repeated in the method box.
Energy Impact Partners
Type: VC firm · HQ: United States (London office) · Stages: Seed, Series A, Series B, Growth · Focus: Climate Tech, Energy, AI, Cybersecurity · Latest activity: Portfolio news, Nov 2026 · Fund size or assets: $4.5B (own site)
Portfolio news dated Nov 2026; $4.5B on file (own site); 40% of its observed portfolio is climate tech; backs seed, Series A, Series B; names the US as where it invests; 8 named decision-makers on file.
Bison Ventures
Type: VC firm · HQ: San Francisco, CA · Stages: Pre-seed, Seed, Series A, Series B · Focus: Climate Tech, AI, Healthtech, Energy · Latest activity: New fund, Oct 2026 · Fund size on file: $160M (SEC Form D, 2025)
Latest fund filing dated Oct 2026; $160M fund on file (SEC Form D, 2025); 21% of its observed portfolio is climate tech; backs pre-seed, seed, Series A; names the US as where it invests; 2 named decision-makers on file.
Greycroft
Type: VC firm · HQ: New York, NY · Stages: Series A, Series B, Growth · Focus: Climate Tech, AI, Industrial Tech, Defense Tech · Latest activity: New deal, Oct 2026 · Fund size on file: $600M (SEC Form D, 2022)
Dated new deal in Oct 2026; $600M fund on file (SEC Form D, 2022); 13% of its observed portfolio is climate tech; backs Series A, Series B, growth-stage; names the US as where it invests; 5 named decision-makers on file.
G2 Venture Partners
Type: VC firm · HQ: Portola Valley, CA · Stages: Series B, Growth · Focus: Climate Tech, AI, Industrial Tech, Mobility · Latest activity: New deal, Aug 2026 · Fund size on file: $53M (SEC Form D, 2026)
Dated new deal in Aug 2026; $53M fund on file (SEC Form D, 2026); 25% of its observed portfolio is climate tech; backs Series B, growth-stage; names the US as where it invests; 8 named decision-makers on file.
Energize Ventures
Type: VC firm · HQ: Chicago, IL · Stages: Series A, Series B, Growth, Any stage · Focus: Climate Tech, Energy, AI, Industrial Tech · Latest activity: New deal, Sep 2026 · Fund size on file: $328M (SEC Form D, 2020)
Dated new deal in Sep 2026; $328M fund on file (SEC Form D, 2020); 55% of its observed portfolio is climate tech; backs Series A, Series B, growth-stage; 8 named decision-makers on file.
First 13 of 27 Series B climate tech investors in the US
| Investor | Type | HQ | Stagesour research | Focusour research | Latest fund or deal | Fund sizeas filed or stated | Checked | Contacts |
|---|---|---|---|---|---|---|---|---|
| Energy Impact Partners | VC firm | United States (London office) | Seed, Series A, Series B, Growth | Climate Tech, Energy, 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 | Climate Tech, AI, Healthtech, Energy | New fund, Oct 2026 | $160M (SEC Form D, 2025) | 4 Nov 2026 | 2 names, firm email · Unlock |
| Greycroft | VC firm | New York, NY | Series A, Series B, Growth | Climate Tech, AI, Industrial Tech, Defense Tech | New deal, Oct 2026 | $600M (SEC Form D, 2022) | 4 Nov 2026 | 5 names · Unlock |
| G2 Venture Partners | VC firm | Portola Valley, CA | Series B, Growth | Climate Tech, AI, Industrial Tech, Mobility | New deal, Aug 2026 | $53M (SEC Form D, 2026) | 4 Nov 2026 | 8 names, firm email · Unlock |
| Energize Ventures | VC firm | Chicago, IL | Series A, Series B, Growth, Any stage | Climate Tech, Energy, AI, Industrial Tech | New deal, Sep 2026 | $328M (SEC Form D, 2020) | 5 Nov 2026 | 8 names · Unlock |
| Autotech Ventures | VC firm | Menlo Park, CA | Pre-seed, Seed, Series A, Series B | Climate Tech, Mobility, AI, Logistics | New fund, Aug 2026 | $25M (SEC Form D, 2026) | 4 Nov 2026 | 8 names · Unlock |
| Overlap Holdings | VC firm | Hicksville, NY | Seed, Series A, Series B | Climate Tech, AI, Energy, Healthtech | New fund, Oct 2026 | $16M (SEC Form D, 2023) | 4 Nov 2026 | 8 names · Unlock |
| How Women Invest | VC firm | Oakland, CA | Pre-seed, Seed, Series A, Series B | Climate Tech, Healthtech, AI, B2B | New fund, Sep 2026 | $12M (SEC Form D, 2026) | 4 Nov 2026 | 8 names · Unlock |
| New System Ventures | VC firm | New York, NY | Pre-seed, Seed, Series A, Series B | Climate Tech, Energy, Fintech, Industrial Tech | New deal, Aug 2026 | $30M (SEC Form D, 2023) | 4 Nov 2026 | 3 names, firm email · Unlock |
| Westly Capital Partners | VC firm | Menlo Park, CA | Pre-seed, Seed, Series A, Series B, Growth | Climate Tech, AI, Energy, Industrial Tech | New fund, May 2026 | $500M (SEC Form D, 2026) | 4 Nov 2026 | 8 names · Unlock |
| Earthshot Ventures | VC firm | San Francisco, CA | Pre-seed, Seed, Series A, Series B | Climate Tech, AI, Energy, Industrial Tech | New fund, Oct 2026 | $77M (SEC Form D, 2026) | 4 Nov 2026 | 8 names, firm email · Unlock |
| Atlas Ventures | VC firm | Chicago, IL | Seed, Series A, Series B | Climate Tech, Logistics, AI, Cybersecurity | New fund, Sep 2026 | $23M (SEC Form D, 2026) | 4 Nov 2026 | 3 names · Unlock |
| Claritas Signal Partners | VC firm | Nashville, TN | Seed, Series A, Series B, Growth | Climate Tech, Healthtech, AI, Media | New deal, Aug 2026 | $14M (SEC Form D, 2021) | 5 Nov 2026 | 8 names · Unlock |
You are seeing 13 of 27. The full list adds 14 more investors and 187 named decision-makers.
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How these 27 break down
By US state
| US state | On this list | Share |
|---|---|---|
| California | 8 | 30% |
| New York | 4 | 15% |
| Illinois | 4 | 15% |
| New Jersey | 2 | 7% |
| Massachusetts | 2 | 7% |
By type
| Type | On this list | Share |
|---|---|---|
| VC firm | 25 | 93% |
| Corporate VC | 1 | 4% |
| Accelerator | 1 | 4% |
Method and limits
- Source
- 25 of the 27 rows carry an SEC filing (Form D or Form ADV). All 27 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 climate tech 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
- 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 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.
- Last refreshed
- November 2026. Rows on this list were checked between 4 Nov 2026 and 5 Nov 2026.
- Fill rates
- Of 27 rows: stage 27, sector 27, fund size 26, website 27. In the paid file: named decision-makers on 27 rows, firm email on 12, LinkedIn page on 22, check size on 7.
- Corrections
- Email [email protected] or use the update form. We act within 5 working days.
Questions
How many Series B climate tech investors in the US are there?
We list 27 as of November 2026. 19 of the 27 have a fund filing or a dated deal in the last 12 months. The cities with the most are San Francisco (3), New York (3) and Chicago (3).
Which Series B climate tech investors in the US raised a new fund in the last 12 months?
14 of the 27 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 climate tech investors in the US?
The median fund size on file for this list is $77M, across the 21 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 6 do not disclose a size there.
How do I contact Series B climate tech investors in the US?
The paid file holds 187 named decision-makers across 27 of these 27 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 climate tech investors in the US come from?
25 of the 27 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 5 Nov 2026 at the latest. The whole file is re-verified twice a year.
Broader lists
Climate tech venture capital firms in the US (256)Series B investors in the US (165)Series B climate tech investors (98)
Related lists
Seed climate tech investors in the US (162)Series B AI investors in the US (126)Series B SaaS investors in the US (108)Pre-seed climate tech investors in the US (84)Series B healthtech investors in the US (69)Series A climate tech investors in the US (60)Series B fintech investors in the US (59)Series B deep tech investors in the US (41)Series B cybersecurity investors in the US (37)Series B medtech investors in the US (36)Growth-stage climate tech investors in the US (34)Series B biotech investors in the US (34)Series B energy investors in the US (29)Series B industrial tech investors in the US (29)Series B consumer investors in the US (29)Series B hardware investors in the US (28)Series B B2B investors in the US (27)Series B developer tools investors in the US (21)
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