# Stuart Barkoff

> Stuart Barkoff is a private equity investor at GEF Capital Partners backing Energy and Agriculture. See 2 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [GEF Capital Partners](https://shizune.co/investors/profile/gef-capital-partners)
- Location: Arlington, United States
- Total investments: 2
- Last investment: Jan 2024
- Lead investor: 100%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/stuartbarkoff/

Stuart Barkoff is a private equity investor at GEF Capital Partners in Arlington focused on Energy and Agriculture. Stuart Barkoff is the founder & Partner at GEF Capital Partners, LLC. Stuart Barkoff attended Emory University in 1997.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Energy | 1 | 50% |
| Agriculture | 1 | 50% |
| Renewable Energy | 1 | 50% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Next Step Energy Solutions | Next Step Energy Solutions converts energy-efficient LED lighting by technology and software to conduct lighting audits. |  | Private Equity | Jan 17, 2024 |  |
| Bluesource | Bluesource is a market-maker, an advisor and a capital source for environmental markets. For over 20 years, the Company has been a leader in climate change and low carbon environmental products and services starting with its first transaction in 1996; the capture and large scale sequestration of vent-stack carbon dioxide. Today, Bluesource createsemission reductions from over 20 different technologies in over 85 locations across 46 states and 4 Canadian provinces. Bluesource has become the dominant player in environmental markets with deep expertise in carbon capture and storage, forestry, transportation, energy efficiency and food processing along with significant environmental market positions in energy production, ODS, mine methane and energy efficient cook stoves in developing countries. Environmental advisory services for the United States and Canada began in 2008 and cover private, public and NGO evaluations, strategy, product development and launches, support for environmental marketplace creation and development, and transactional support such as protocol development as a sampling. Over the past several years, Bluesource has developed expertise and transactional experience in renewable energy (RINs, RECs, RNG), environmental mitigation (land use, habitat protection, restoration) and climate change adaptation. |  | Private Equity |  |  |

2 of 2 investments shown.

## About GEF Capital Partners

VC Fund · Bethesda, United States

GEF Capital Partners is a private equity fund manager focused on companies that promote resource efficiency and positive environmental impact. They began operations in March 2018 following the completion of a collaborative transaction with Global Environment Fund, an early pioneer in sustainability and environmental investing in key emergingmarkets, globally, and in the US.

5 contacts available at GEF Capital Partners.

| Name | Title | Profile |
| --- | --- | --- |
| Alexandre Alvim | Founder & Managing Partner | https://shizune.co/investors/profile/alexandre-alvim |
| Catherine Lien | Principal | https://shizune.co/investors/profile/catherine-lien-lien |
| Daniel Prawda | Founder/Managing Partner – United States | https://shizune.co/investors/profile/daniel-prawda |
| Stuart Barkoff | Founder & Partner | https://shizune.co/investors/profile/stuart-barkoff |
| Anibal Wadih | Founder/Managing Partner – Latin America | https://shizune.co/investors/profile/anibal-wadih |

## Similar investors

### Similar stage
- [Foresight Group](https://shizune.co/investors/profile/foresight-group) — VC Fund
- [YFM Equity Partners](https://shizune.co/investors/profile/yfm-equity-partners) — VC Fund
- [Fondaction](https://shizune.co/investors/profile/fondaction) — VC Fund

## FAQ

### What does Stuart Barkoff invest in?

Stuart Barkoff invests primarily in Energy, Agriculture and Renewable Energy startups, most often at Private Equity stage. Most of the 2 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Stuart Barkoff last invest?

The most recent investment recorded for Stuart Barkoff closed in Jan 2024. Shizune tracks 2 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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