Hartree Executive and Leadership Team

August, 2026

Leadership Overview

Hartree has 4 executives leading key functions including strategy, finance, technology, and global operations.

Driven by a commitment to commodity market excellence, Hartree maintains a global merchant focus by identifying value across the production, refinement, and transportation sectors to capture supply chain opportunities.

Leadership Roles at Hartree

  • Chief Financial Officer - Kalyan Popuri
  • Global Chief Operating Officer, Head of Trading & Asset Operations, Hartree Holdco - John Tonielli
  • Chief Technology Officer - Glenn Shaw
  • Founding Managing Director - Guy Merison
  • Kalyan Popuri - Chief Financial Officer

    Kalyan Popuri, the Chief Financial Officer at Hartree, manages the firm's global financial health and capital allocation strategies. Overseeing complex fiscal reporting and risk management frameworks, the Chief Financial Officer ensures the firm maintains robust liquidity to support large-scale commodity transactions. This leadership role involves close collaboration with investment partners to optimize the balance sheet against volatile energy market conditions. Kalyan Popuri directs the financial planning processes that underpin the firm's merchant activities, ensuring that capital deployment aligns with long-term growth objectives. By implementing sophisticated accounting controls, the Chief Financial Officer mitigates exposure across the firm's international operations. Popuri monitors global economic indicators to provide the strategic insights necessary for informed decision-making at the executive level. Through disciplined financial oversight, the Chief Financial Officer protects the firm's assets while enabling the agility required to capitalize on emerging opportunities within the global energy supply chain.

    John Tonielli - Global Chief Operating Officer, Head of Trading & Asset Operations, Hartree Holdco

    John Tonielli, the Global Chief Operating Officer, Head of Trading & Asset Operations, Hartree Holdco at Hartree, executes the firm's operational strategy across all commodity trading desks. Overseeing the logistics of physical asset movement, the Global Chief Operating Officer, Head of Trading & Asset Operations, Hartree Holdco ensures that supply chain operations remain efficient and compliant with international regulations. This leadership role involves coordinating with regional heads to streamline the transportation and storage of energy products. John Tonielli directs the daily activities of the trading teams, ensuring that execution remains consistent with the firm's risk appetite. By managing the complexities of global asset operations, the Global Chief Operating Officer, Head of Trading & Asset Operations, Hartree Holdco maintains the operational stability necessary for sustained profitability. Tonielli drives process improvements that enhance the firm's ability to capture value in volatile markets, ensuring that every link in the supply chain functions with maximum precision.

    Glenn Shaw - Chief Technology Officer

    Glenn Shaw, the Chief Technology Officer at Hartree, architects the digital infrastructure required to support high-frequency commodity trading and global asset management. Overseeing the development of proprietary analytical tools, the Chief Technology Officer ensures the firm maintains a technological edge in identifying market discrepancies. This leadership role involves integrating advanced data systems to track the refinement and transportation of commodities across diverse geographic regions. Glenn Shaw directs the cybersecurity and data integrity initiatives that safeguard the firm's intellectual property and trade secrets. By optimizing the technological stack, the Chief Technology Officer enables seamless communication between the firm's eleven global offices. Shaw drives innovation in algorithmic trading platforms, allowing the firm to react instantly to market fluctuations. Through the implementation of scalable cloud solutions, the Chief Technology Officer supports the firm's mission to remain at the forefront of the energy industry's digital transformation.

    Guy Merison - Founding Managing Director

    Guy Merison, the Founding Managing Director at Hartree, directs the firm's overarching strategic vision within the global commodities landscape. By identifying inefficiencies in the production and consumption of energy assets, the Founding Managing Director architects long-term value creation across international markets. This leadership role involves constant evaluation of supply chain dynamics to anticipate market shifts before competitors. Guy Merison maintains deep oversight of the firm's merchant activities, ensuring alignment with the core mission of capturing value in under-valued commodities. Through rigorous analysis of global trade flows, the Founding Managing Director secures the firm's position as a leader in alternative investments. Merison drives the expansion of the firm's footprint, ensuring that the eleven global offices operate with unified strategic intent. By fostering a culture of precision and market foresight, the Founding Managing Director sustains the firm's competitive advantage in complex energy sectors.

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    Frequently Asked Questions Regarding Hartree Top Executives and Leadership Team

    Who leads Hartree?
    Hartree is led by Kalyan Popuri (Chief Financial Officer), along with executives such as John Tonielli (Global Chief Operating Officer, Head of Trading & Asset Operations, Hartree Holdco) and Glenn Shaw (Chief Technology Officer).
    Who is part of Hartree’s executive team?
    The executive team of Hartree includes leaders such as Kalyan Popuri (Chief Financial Officer), John Tonielli (Global Chief Operating Officer, Head of Trading & Asset Operations, Hartree Holdco), Glenn Shaw (Chief Technology Officer) and other senior executives.
    How many executives does Hartree have?
    Hartree has 4 executives leading key business areas.
    What roles are included in Hartree’s leadership team?
    The leadership team of Hartree includes roles such as Chief Financial Officer, Global Chief Operating Officer, Head of Trading & Asset Operations, Hartree Holdco, Chief Technology Officer, Founding Managing Director.