15 energy investors in Massachusetts
We list 15 energy investors in Massachusetts as of November 2026: 14 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 (9), Cambridge (4) and Framingham (1).
Top 5 energy 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.
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; names the US as where it invests; 3 named decision-makers on file.
Inflection
Type: VC firm · HQ: Framingham, MA · Stages: Pre-seed, Seed · Focus: Energy, AI, Space, Defense Tech · Latest activity: New fund, Sep 2026 · Fund size on file: $50M (SEC Form D, 2026)
Latest fund filing dated Sep 2026; $50M fund on file (SEC Form D, 2026); states energy as a focus; names the US as where it invests; 3 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; names the US as where it invests; 8 named decision-makers on file.
Battery Ventures
Type: VC firm · HQ: Boston, MA · Stages: Any stage · Focus: Energy, Biotech, Future of Work, Data · 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); states energy as a focus; names the US as where it invests.
Wave Equity Partners
Type: VC firm · HQ: Boston, MA · Stages: Growth · Focus: Energy, Industrial Tech, Climate 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); states energy as a focus; 8 named decision-makers on file.
First 10 of 15 energy investors in Massachusetts
| 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 |
| 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 |
| 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 |
| Battery Ventures | VC firm | Boston, MA | Any stage | Energy, Biotech, Future of Work, Data | Portfolio news, Jul 2026 | $3.2B (own site) | 4 Nov 2026 | LinkedIn page · Unlock |
| Wave Equity Partners | VC firm | Boston, MA | Growth | Energy, Industrial Tech, Climate Tech, Mobility | New fund, Sep 2026 | $250M (SEC Form D, 2023) | 4 Nov 2026 | 8 names, firm email · Unlock |
| Timescale Ventures | VC firm | Marblehead, MA | Pre-seed, Seed | Energy, Industrial Tech, AI, Space | New fund, Sep 2026 | $50M (SEC Form D, 2025) | 4 Nov 2026 | 2 names, firm email · Unlock |
| Breakthrough Energy Ventures | VC firm | Boston, MA | Energy, Climate Tech | New fund, Aug 2026 | $100M (SEC Form D, 2026) | 4 Nov 2026 | 3 names · Unlock | |
| 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) | 5 Nov 2026 | 8 names, firm email · Unlock |
| Engine Ventures | VC firm | Cambridge, MA | Energy, AI, Deep Tech, Climate Tech | New fund, May 2026 | $500M (SEC Form D, 2026) | 4 Nov 2026 | 8 names, firm email · Unlock | |
| Azolla Ventures | VC firm | Cambridge, MA | Seed | Energy, Climate Tech, Industrial Tech, Agritech | New fund, Mar 2026 | $130M (SEC Form D, 2021) | 4 Nov 2026 | 3 names, firm email · Unlock |
You are seeing 10 of 15. The full list adds 5 more investors and 75 named decision-makers.
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How these 15 break down
By city
| City | On this list | Share |
|---|---|---|
| Boston | 9 | 60% |
| Cambridge | 4 | 27% |
By stage
| Stage | On this list | Share |
|---|---|---|
| Pre-Seed | 5 | 33% |
| Seed | 11 | 73% |
| Series A | 3 | 20% |
| Series B | 2 | 13% |
| Growth | 2 | 13% |
Stage is our research. A firm can back more than one stage.
Method and limits
- Source
- 14 of the 15 rows carry an SEC filing (Form D or Form ADV). All 15 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. 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 15 rows: stage 13, sector 15, fund size 14, website 15. In the paid file: named decision-makers on 14 rows, firm email on 9, LinkedIn page on 9, check size on 1.
- Corrections
- Email [email protected] or use the update form. We act within 5 working days.
Questions
How many energy investors in Massachusetts are there?
We list 15 as of November 2026. 10 of the 15 have a fund filing or a dated deal in the last 12 months. The cities with the most are Boston (9), Cambridge (4) and Framingham (1).
Which energy investors in Massachusetts raised a new fund in the last 12 months?
7 of the 15 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 Inflection (Sep 2026).
What is the typical fund size of energy investors in Massachusetts?
The median fund size on file for this list is $190M, across the 10 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 5 do not disclose a size there.
How do I contact energy investors in Massachusetts?
The paid file holds 75 named decision-makers across 14 of these 15 and a firm email for 9. 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 energy investors in Massachusetts come from?
14 of the 15 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
Energy venture capital firms in the US (249)Venture capital firms in Massachusetts (185)
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