19 climate tech investors in Massachusetts, including 18 in Boston
We list 19 climate tech investors in Massachusetts as of November 2026: 18 have an SEC filing on file and 1 was checked on the firm's own website or an official register, and the list was last checked on 6 Nov 2026. The cities with the most head offices on this list are Boston (12), Cambridge (5) and Marblehead (1). 18 of the 19 are in the Boston metro area, so this page is also our list of climate tech investors in Boston.
Top 5 climate tech investors in Massachusetts, 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), 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 (15) and completeness of the public record (10). Regional 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.
Battery Ventures
Type: VC firm · HQ: Boston, MA · Stages: Any stage · Focus: Climate Tech, Energy, Biotech, Future of Work · Latest activity: Portfolio news, Jul 2026 · Fund size or assets: $3.2B (own site)
Portfolio news dated Jul 2026; $3.2B on file (own site); 100% of its observed portfolio is climate tech; names the US as where it invests.
Building Ventures
Type: VC firm · HQ: Boston, MA · Stages: Seed · Focus: Climate Tech, Proptech, AI, Energy · 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); 26% of its observed portfolio is climate tech; names the US as where it invests; 8 named decision-makers on file.
Wave Equity Partners
Type: VC firm · HQ: Boston, MA · Stages: Growth · Focus: Climate Tech, Energy, Industrial Tech, Mobility · Latest activity: New fund, Sep 2026 · Fund size on file: $250M (SEC Form D, 2023)
Latest fund filing dated Sep 2026; $250M fund on file (SEC Form D, 2023); 71% of its observed portfolio is climate tech; 8 named decision-makers on file.
Safar Partners
Type: VC firm · HQ: Cambridge, MA · Stages: Seed · Focus: Climate Tech, 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); 10% of its observed portfolio is climate tech; names the US as where it invests; 3 named decision-makers on file.
Clean Energy Ventures
Type: VC firm · HQ: Boston, MA · Stages: Seed, Series A · Focus: Climate Tech, Energy, Fintech, Deep Tech · Latest activity: New deal, May 2026 · Fund size on file: $306M (SEC Form D, 2022)
Dated new deal in May 2026; $306M fund on file (SEC Form D, 2022); 62% of its observed portfolio is climate tech; 8 named decision-makers on file.
First 10 of 19 climate tech investors in Massachusetts
| Investor | Type | HQ | Stagesour research | Focusour research | Latest fund or deal | Fund sizeas filed or stated | Checked | Contacts |
|---|---|---|---|---|---|---|---|---|
| Battery Ventures | VC firm | Boston, MA | Any stage | Climate Tech, Energy, Biotech, Future of Work | Portfolio news, Jul 2026 | $3.2B (own site) | 4 Nov 2026 | LinkedIn page · Unlock |
| Building Ventures | VC firm | Boston, MA | Seed | Climate Tech, Proptech, AI, Energy | New deal, Sep 2026 | $100M (SEC Form D, 2021) | 5 Nov 2026 | 8 names · Unlock |
| Wave Equity Partners | VC firm | Boston, MA | Growth | Climate Tech, Energy, Industrial Tech, Mobility | New fund, Sep 2026 | $250M (SEC Form D, 2023) | 4 Nov 2026 | 8 names, firm email · Unlock |
| Safar Partners | VC firm | Cambridge, MA | Seed | Climate Tech, Healthtech, Industrial Tech, Biotech | New deal, Aug 2026 | $300M (SEC Form D, 2023) | 4 Nov 2026 | 3 names, firm email · Unlock |
| Clean Energy Ventures | VC firm | Boston, MA | Seed, Series A | Climate Tech, Energy, Fintech, Deep Tech | New deal, May 2026 | $306M (SEC Form D, 2022) | 5 Nov 2026 | 8 names, firm email · Unlock |
| Timescale Ventures | VC firm | Marblehead, MA | Pre-seed, Seed | Climate Tech, Energy, Industrial Tech, AI | New fund, Sep 2026 | $50M (SEC Form D, 2025) | 4 Nov 2026 | 2 names, firm email · Unlock |
| Equal Opportunity Ventures | VC firm | Cambridge, MA | Pre-seed | Climate Tech, Healthtech, Fintech, Food and Beverage | New deal, Apr 2026 | $152M (SEC Form ADV) | 5 Nov 2026 | 8 names · Unlock |
| Breakthrough Energy Ventures | VC firm | Boston, MA | Climate Tech, Energy | New fund, Aug 2026 | $100M (SEC Form D, 2026) | 4 Nov 2026 | 3 names · Unlock | |
| Azolla Ventures | VC firm | Cambridge, MA | Seed | Climate Tech, Energy, Industrial Tech, Agritech | New fund, Mar 2026 | $130M (SEC Form D, 2021) | 4 Nov 2026 | 3 names, firm email · Unlock |
| Material Impact | VC firm | Boston, MA | Pre-seed | Climate Tech, Industrial Tech, Deep Tech, Robotics | New deal, Dec 2025 | $325M (SEC Form D, 2022) | 5 Nov 2026 | 8 names, firm email · Unlock |
You are seeing 10 of 19. The full list adds 9 more investors and 93 named decision-makers.
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18 climate tech investors in Boston
11 of the 18 have a fund filing or a dated deal in the last 12 months; the median fund size on file is $250M (SEC Form D, 11 firms); the most recent fund filings are from Wave Equity Partners (Sep 2026), Breakthrough Energy Ventures (Aug 2026) and Engine Ventures (May 2026); of the 16 with a stage on file, seed (12), pre-seed (9) and Series A (3); the count covers the metro area, by city: Boston (12), Cambridge (5) and Wellesley Hills (1); the paid file holds 91 named decision-makers for them.
The first 5 in list order: Battery Ventures, Building Ventures, Wave Equity Partners, Safar Partners and Clean Energy Ventures. They are ranked with the rest of the list, by the same rule.
How these 19 break down
By city
| City | On this list | Share |
|---|---|---|
| Boston | 12 | 63% |
| Cambridge | 5 | 26% |
By stage
| Stage | On this list | Share |
|---|---|---|
| Pre-Seed | 10 | 53% |
| Seed | 13 | 68% |
| Series A | 3 | 16% |
| Series B | 2 | 11% |
| Growth | 2 | 11% |
Stage is our research. A firm can back more than one stage.
Method and limits
- Source
- 18 of the 19 rows carry an SEC filing (Form D or Form ADV). All 19 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. Place: head office in Massachusetts.
- 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), 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 (15) and completeness of the public record (10). Regional 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 6 Nov 2026.
- Fill rates
- Of 19 rows: stage 17, sector 19, fund size 18, website 19. In the paid file: named decision-makers on 18 rows, firm email on 10, LinkedIn page on 10, check size on 1.
- Corrections
- Email [email protected] or use the update form. We act within 5 working days.
Questions
How many climate tech investors in Massachusetts are there?
We list 19 as of November 2026. 12 of the 19 have a fund filing or a dated deal in the last 12 months. The cities with the most are Boston (12), Cambridge (5) and Marblehead (1).
Which climate tech investors in Massachusetts raised a new fund in the last 12 months?
7 of the 19 have a fund filing dated in the last 12 months. The most recent on this list are Wave Equity Partners (Sep 2026), Timescale Ventures (Sep 2026) and Breakthrough Energy Ventures (Aug 2026).
What is the typical fund size of climate tech investors in Massachusetts?
The median fund size on file for this list is $190M, across the 12 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 7 do not disclose a size there.
How do I contact climate tech investors in Massachusetts?
The paid file holds 93 named decision-makers across 18 of these 19 and a firm email for 10. 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 climate tech investors in Massachusetts come from?
18 of the 19 rows have an SEC filing on file (Form D or Form ADV) and 1 was 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 6 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)Venture capital firms in Massachusetts (185)
Related lists
Climate tech investors in California (98)AI investors in Massachusetts (61)Healthtech investors in Massachusetts (58)SaaS investors in Massachusetts (55)Climate tech investors in New York (40)Medtech investors in Massachusetts (37)Biotech investors in Massachusetts (37)Fintech investors in Massachusetts (26)Industrial tech investors in Massachusetts (23)Deep tech investors in Massachusetts (20)Hardware investors in Massachusetts (16)Energy investors in Massachusetts (15)
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