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Hartree Partners is a global commodities trading firm specializing in energy and related markets, based in New York City, New York. The firm engages in physical and financial trading across asset classes like gas, power, renewables, metals, and agriculture, providing risk solutions and asset management. Hartree operates with over 600 traders and analysts, with over 4,500 employees across 54 offices worldwide, and maintains over $4 billion in capitalization. Privately held, Oaktree Capital Management is a key investor, acquiring Hess’s stake in 2015. The firm expanded its portfolio by acquiring a controlling interest in Sprague Resources LP in 2021 and ED&F Man Commodities’ core units in 2025. It was founded in 1997 by Stephen Semlitz, Stephen Hendel, and Guy Merison.
Key people at Hartree Partners.
Hartree Partners was founded in 1997 by Guy Merison (Co-Founder & Managing Director) and Stephen Hendel (Co-Founder & Managing Director) and Stephen Semlitz (Co-Founder & Managing Director).
Hartree Partners has 4 tracked investments across 4 companies. The latest tracked deal is $52.0M Series D in Insight M in February 2024.
| Date | Company | Round | Lead Investor(s) | Co-Investor(s) |
|---|---|---|---|---|
| Feb 1, 2024 | Insight M | $52.0M Series D | BlackRock | John Hamer, Dcvc (data Collective), Energy Innovation Capital, Ogci Climate Investments |
| Jun 1, 2023 | SustainCERT | $37.0M Series B | — | Energy Impact Partners, Innovacom, Microsoft, Jonathan Piquet, Rémi Said |
| Mar 1, 2023 | Hydrosat | $15.0M Series A | Alexander Küppers | 360 Capital Partners, Blue Bear Capital, Craft Ventures, Cultivation Capital, Expon Capital, Idea Fund OF LA Crosse, Industrious Ventures, Motier Ventures, OTB Ventures, Techstars, True Global Ventures, Eric Larchevêque, Pascal Gauthier, Pierre Lavaux, Sebastien Borget, Freeflow Ventures, Hemisphere Ventures, Santa Barbara Venture Partners |
| Feb 22, 2023 | Kita | $4.8M Seed | Natasha Jones | Chris Coleridge, TOM Graham, Stephen Brittain |
Key people at Hartree Partners.
Hartree Partners was founded in 1997 by Guy Merison (Co-Founder & Managing Director) and Stephen Hendel (Co-Founder & Managing Director) and Stephen Semlitz (Co-Founder & Managing Director).
