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Active energy investors in Massachusetts — 2026

130 investors backed 13 energy offerings by companies in Massachusetts in the last 12 months, per SEC Form D. Companies file a Form D with the SEC when they raise money under Regulation D, and report how many investors have already put money in. Funds file one too when they raise, which is how we list the venture and private equity funds based in Massachusetts. Figures come straight from SEC EDGAR and refresh daily.

Investors in these offerings
130
Form D “total number already invested” · All 13 offerings, Sep 28, 2025 – Sep 28, 2026
New energy offerings
13
Companies in Massachusetts that filed a new Form D, Sep 28, 2025 – Sep 28, 2026
Amount sold
$263.5M
As reported in Form D · All 13 offerings, Sep 28, 2025 – Sep 28, 2026

Offerings are matched on the Form D industry group (Coal Mining, Electric Utilities, Energy Conservation, Environmental Services, Oil and Gas, Other Energy) and the company’s business address, one offering per company, funds excluded. Each filing reports how many investors have already invested, not who they are, so an investor in two offerings counts twice. Run the same search on sec.gov.

Venture and private equity funds based in Massachusetts

SEC EDGAR Form D filings

Funds file a Form D when they raise from their own investors. These are recent filings by venture capital and private equity funds with a business address in Massachusetts, from the last 45 days, newest first.

Recent Form D filings by venture capital and private equity funds in Massachusetts
FundTypeCityFund sizeFiledFiling
Altimeter Growth Olympic Fund VIII, L.P.Venture capital fundBOSTON$100.0MSep 28, 2026 · amendmentForm Dfor Altimeter Growth Olympic Fund VIII, L.P. on sec.gov
Solamere Paragon Feeder Fund-A, LPPrivate equity fundBOSTONIndefiniteSep 28, 2026Form Dfor Solamere Paragon Feeder Fund-A, LP on sec.gov
OT YC Fund IV, LLCVenture capital fundBOSTONIndefiniteSep 25, 2026 · amendmentForm Dfor OT YC Fund IV, LLC on sec.gov
GC Venture XIII (LL) Arranger, L.P.Venture capital fundCAMBRIDGEIndefiniteSep 25, 2026Form Dfor GC Venture XIII (LL) Arranger, L.P. on sec.gov
GC Venture XIII (LL), L.P.Venture capital fundCAMBRIDGEIndefiniteSep 25, 2026Form Dfor GC Venture XIII (LL), L.P. on sec.gov
VALSPRING CAPITAL FUND II, L.P.Private equity fundBOSTONIndefiniteSep 22, 2026Form Dfor VALSPRING CAPITAL FUND II, L.P. on sec.gov
Altimeter Catskill Fund I, L.P.Venture capital fundBOSTON$25.0MSep 21, 2026Form Dfor Altimeter Catskill Fund I, L.P. on sec.gov
Catalyst Fund Resilience I, L.P.Venture capital fundCAMBRIDGEIndefiniteSep 18, 2026 · amendmentForm Dfor Catalyst Fund Resilience I, L.P. on sec.gov
021T Capital SPV PSI, L.P.Venture capital fundCAMBRIDGE$7.8MSep 17, 2026 · amendmentForm Dfor 021T Capital SPV PSI, L.P. on sec.gov
Summit Partners Co-Invest (Cipher), L.P.Private equity fundBOSTONIndefiniteSep 17, 2026Form Dfor Summit Partners Co-Invest (Cipher), L.P. on sec.gov
Fiduciary Trust International Private Equity Access Program LPPrivate equity fundLINCOLNIndefiniteSep 16, 2026 · amendmentForm Dfor Fiduciary Trust International Private Equity Access Program LP on sec.gov

Funds with “Energy”, “Climate”, “Clean”, “Cleantech” in their name

Form D doesn’t say what a fund invests in, so this is a keyword match on the fund’s name, not a stated energy focus. Venture capital and private equity funds in Massachusetts that filed in the last 12 months.

Funds in Massachusetts with a energy keyword in their name
FundTypeCityFund sizeFiledFiling
Breakthrough Energy Ventures Special Situations I, L.P.EnergyVenture capital fundBOSTON$100.0MAug 11, 2026Form Dfor Breakthrough Energy Ventures Special Situations I, L.P. on sec.gov
MIF III Village Solar Co-Invest L.P.SolarPrivate equity fundBOSTONIndefiniteApr 21, 2026Form Dfor MIF III Village Solar Co-Invest L.P. on sec.gov
Private Energy I, LPEnergyPrivate equity fundBOSTONIndefiniteMar 24, 2026Form Dfor Private Energy I, LP on sec.gov
Breakthrough Energy Ventures Select Fund II, L.P.EnergyVenture capital fundBOSTON$600.0MFeb 18, 2026Form Dfor Breakthrough Energy Ventures Select Fund II, L.P. on sec.gov

Organisation-level public data from SEC EDGAR. We don’t publish personal names or contact details on this page. Fund size is the offering amount in the fund’s Form D; “Indefinite” means the filing didn’t state one.

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