Post Holdings Executive and Leadership Team

July, 2026

Leadership Overview

Post Holdings has 4 executives leading key functions including human resources, operations, finance, and legal.

Driven by a commitment to excellence, Post Holdings is dedicated to delivering a diverse portfolio of high-quality food products that meet evolving consumer needs across breakfast, refrigerated foods, and private label categories, solidifying its market presence through strategic brand management and operational efficiency.

Leadership Roles at Post Holdings

  • Chief Financial Officer & Treasurer - Matthew Mainer
  • Executive VP & Chief Operating Officer - Nicolas Catoggio
  • Chief Human Resources Officer - Karen Little
  • Executive VP, General Counsel & Chief Administrative Officer - Diedre Gray
  • Matthew Mainer - Chief Financial Officer & Treasurer

    Matthew Mainer, the Chief Financial Officer & Treasurer at Post Holdings, directs all financial planning, accounting, and treasury functions. Managing the company's fiscal health, Matthew Mainer oversees capital allocation, investor relations, and financial risk management across Post Holdings' diverse portfolio, including its well-known brands in breakfast cereals and pet food. This Chief Financial Officer & Treasurer role is pivotal in ensuring financial stability and supporting strategic growth initiatives, such as acquisitions and market expansion. By providing critical financial insights and managing the company's liquidity, Matthew Mainer enables Post Holdings to navigate the complexities of the global consumer packaged goods market. The Treasurer's responsibilities also include managing debt and equity financing to fuel ongoing operations and future development.

    Nicolas Catoggio - Executive VP & Chief Operating Officer

    Nicolas Catoggio, the Executive VP & Chief Operating Officer at Post Holdings, oversees the operational execution across the company's varied business units. Driving efficiency and synergy within the manufacturing, marketing, and distribution of branded and private label food products, Nicolas Catoggio ensures seamless operations from production to market. This executive VP & Chief Operating Officer role encompasses managing the supply chain, optimizing production processes for categories like egg products and cheese, and enhancing the delivery of foodservice and nutritional products. By focusing on operational excellence, Nicolas Catoggio directly supports Post Holdings' ability to maintain a strong market presence and deliver consistent quality. The Chief Operating Officer's strategic oversight is critical for scaling operations and integrating new product lines effectively.
    Nicolas Catoggio

    Karen Little - Chief Human Resources Officer

    Karen Little, the Chief Human Resources Officer at Post Holdings, directs all human capital strategies and organizational development initiatives. Overseeing talent acquisition, employee relations, and compensation and benefits programs, Karen Little ensures Post Holdings attracts and retains top talent essential for its diverse consumer packaged goods operations. This leadership role involves fostering a positive and productive work environment across all business segments, from ready-to-eat cereals to private brand foods. By aligning HR policies with the company's strategic objectives, Karen Little supports the integration of acquired businesses and drives employee engagement. The Chief Human Resources Officer's focus remains on building a robust workforce capable of executing Post Holdings' mission to deliver quality food products worldwide.
    Karen Little

    Diedre Gray - Executive VP, General Counsel & Chief Administrative Officer

    Diedre Gray, the Executive VP, General Counsel & Chief Administrative Officer at Post Holdings, leads the company's legal affairs and oversees critical administrative functions. Ensuring compliance with all regulatory requirements and managing corporate governance, Diedre Gray provides strategic legal counsel across Post Holdings' global operations, encompassing everything from peanut butter and sausage production to private brand foods. This Executive VP, General Counsel & Chief Administrative Officer role also involves managing corporate services, facilities, and ensuring the smooth functioning of administrative departments that support the company's diverse business segments. By safeguarding the company's legal interests and optimizing administrative processes, Diedre Gray contributes significantly to Post Holdings' operational integrity and strategic execution. The General Counsel's expertise is vital for navigating complex legal landscapes in the food industry.
    Diedre Gray

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    Frequently Asked Questions Regarding Post Holdings Top Executives and Leadership Team

    Who leads Post Holdings?
    Post Holdings is led by Matthew Mainer (Chief Financial Officer & Treasurer), along with executives such as Nicolas Catoggio (Executive VP & Chief Operating Officer) and Karen Little (Chief Human Resources Officer).
    Who is part of Post Holdings’s executive team?
    The executive team of Post Holdings includes leaders such as Matthew Mainer (Chief Financial Officer & Treasurer), Nicolas Catoggio (Executive VP & Chief Operating Officer), Karen Little (Chief Human Resources Officer) and other senior executives.
    How many executives does Post Holdings have?
    Post Holdings has 4 executives leading key business areas.
    What roles are included in Post Holdings’s leadership team?
    The leadership team of Post Holdings includes roles such as Chief Financial Officer & Treasurer, Executive VP & Chief Operating Officer, Chief Human Resources Officer, Executive VP, General Counsel & Chief Administrative Officer.