Climate and pollution-focused private equity firm

GEF Capital Partners

  • HeadquartersArlington, VA S4
  • Founded2018 S1
  • Websitegefcapital.com
  • Last verifiedNovember 5, 2026

At a glance

Latest fundGEF US Climate Solutions Fund II, $325M (Apr 2024) S6
Deal typesPlatform S6
GeographyUnited States, Canada S6
SectorsEnvironmental & Waste, Industrial & Manufacturing

What GEF Capital Partners buys

GEF Capital Partners is a private equity firm based in the Washington, D.C. area, formed in 2018 as a spinout from Global Environment Fund. This profile covers its US strategy; it also runs separate programs in Brazil and India. The US fund takes control positions in lower middle market companies in the United States and Canada that are profitable and founder-led, with proven technology that addresses climate change or pollution. Its range spans waste, water, clean energy, energy efficiency and resource efficiency.

The firm publishes no EBITDA, revenue or check range. Its GEF US Climate Solutions Fund II closed at $325 million in April 2024. Since then it has built two environmental platforms: VIYA Environmental, formed from soil and water remediation firms McMillan-McGee and ORIN Technologies, and EverMetal, a critical metals recycler started with Custom Alloys in August 2025. A smaller remediation or specialty recycling company would most likely meet GEF as an add-on to one of those platforms.

Recent deals

Announced in the 24 months before November 5, 2026.

DateCompanyTypeSectorSource
Feb 2026VIYA EnvironmentalMcMillan-McGee and ORIN Technologies launched as one remediation company under GEF's ownershipInvestmentEnvironmental & WasteSource
September 2025Veristar EnergyAtSite Energy became Veristar after merging Vergent Power Solutions and Lone Star Power Solutions into one onsite energy platformInvestmentSource
Aug 2025McMillan-McGee and ORIN TechnologiesPurchase of two soil and water remediation firms to start a pollution remediation platform; the date is the firm's news post, not the deal datePlatformEnvironmental & WasteSource
August 2025EverMetal / Custom AlloysCritical metals recycling platform formed with the purchase of Custom Alloys, a superalloy scrap processor in Belvidere, IllinoisPlatformEnvironmental & WasteSource

Portfolio by sector

From the firm's portfolio page S10.

United States

  • VIYA Environmental (McMillan-McGee and ORIN Technologies)
  • EverMetal
  • Veristar Active (unconfirmed)
  • Polargy Active (unconfirmed)
  • InSite Active (unconfirmed)
  • Lifecycle Renewables Active (unconfirmed)
  • Murf E-Bikes Active (unconfirmed)
  • Civic Renewables Active (unconfirmed)
  • Next Step Energy Solutions Active (unconfirmed)

Past investments: Bluesource

Greymont’s take

How GEF Capital Partners fits a seller

GEF suits founders of profitable environmental companies, especially remediation, specialty recycling and energy efficiency businesses, who want a control investor that knows their market and tracks environmental results alongside financial ones. It fits a company with proven technology better than an early-stage idea, because the US fund looks for businesses that already make money.

In both of its recent environmental platforms GEF bought established specialists and built around them, and a seller should expect that kind of change: McMillan-McGee and ORIN became VIYA in February 2026. Owners should ask early whether their company is large enough, since no size range is published, how much of the $325 million fund remains for new deals, and whether their company would keep its name inside a platform.

Questions owners ask

Does GEF Capital buy environmental services companies?

Yes. VIYA Environmental, a soil and water remediation company formed from McMillan-McGee and ORIN Technologies, names GEF as its owner. GEF also lists EverMetal, which recycles critical metals through Custom Alloys in Belvidere, Illinois.

What size company does GEF Capital look for?

Its US fund describes its target only as the lower mid-market and publishes no EBITDA, revenue or check range. The fund closed at $325 million in April 2024, so an owner should ask directly about fit.

Does GEF Capital take control of the companies it buys?

Yes, in the US. Its April 2024 fund announcement said Fund II makes control investments in lower middle-market companies in the United States and Canada.

Sources

  1. S1GEF Capital Partners: About Us Accessed November 5, 2026
  2. S2GEF Capital Partners: U.S. Investment Strategy Accessed November 5, 2026
  3. S3GEF Capital Partners: Investment Strategy Accessed November 5, 2026
  4. S4GEF Capital Partners: Contact Accessed November 5, 2026
  5. S5GEF Capital Partners: News & Insights Accessed November 5, 2026
  6. S6GEF Capital Partners completes final closing on $325 Million US Climate Solutions Fund II (April 22, 2024) Accessed November 5, 2026
  7. S7VIYA Environmental: VIYA Launches to Address Longstanding Gap in Pollution Remediation Delivery (February 4, 2026) Accessed November 5, 2026
  8. S8GEF Capital Partners: EverMetal Accessed November 5, 2026
  9. S9GEF Capital Partners: Veristar Accessed November 5, 2026
  10. S10GEF Capital Partners: company listing Accessed November 5, 2026

Compiled by Greymont Advisors from public sources, including the firm’s own website and press releases. Greymont is not affiliated with GEF Capital Partners. Figures are as reported on the dates shown and may have changed. Request a correction

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