Regeneron Executive and Leadership Team

June, 2026

Leadership Overview

Regeneron has 10 executives leading key functions including strategy, finance, marketing, and operations.

Driven by scientific advancement, Regeneron is dedicated to discovering, developing, and commercializing life-changing medicines for serious diseases, leveraging advanced science and proprietary technologies to address unmet medical needs globally.

Leadership Roles at Regeneron

  • Co-Chair, President & Chief Executive Officer - Leonard Schleifer
  • Board co-Chair, President & Chief Executive Officer - Leonard Schleifer
  • Chief Financial Officer & Senior VP, Finance - Robert Landry
  • Chief Marketing Officer - Peter Weber
  • Executive Assistant To the Chief Human Resources Officer - Wrechelle Nantes
  • Genetic Medicines Clinical Development Unit Chief of Staff - Michelle DeSimone
  • Head Operations Strategy, To Chief of Staff & Executive VP, Regulatory, Patient Safety & Quality - Kim Brenner
  • Chief Marketing Officer & Chief Medical Officer - Stephanie Moult
  • Director, Global Procurement & Chief Marketing Officer, Advanced Therapies - Erick Honores
  • Chief of Staff Regeneron - Garvin Hyatt
  • Leonard Schleifer - Co-Chair, President & Chief Executive Officer

    Leonard Schleifer, the Co-Chair, President & Chief Executive Officer at Regeneron, directs the overarching strategy and operational execution for the company's innovative medicine development. Schleifer guides Regeneron's mission to use advanced science and proprietary technologies to create life-changing treatments for serious diseases, including cancer, eye diseases, and inflammatory disorders. This leadership role involves setting the strategic direction for research and development pipelines, ensuring alignment with market needs and scientific breakthroughs. By overseeing global operations and commercialization efforts, Leonard Schleifer drives the company's expansion and impact in addressing critical health challenges. The Chief Executive Officer's focus remains on fostering a culture of scientific excellence and translating discoveries into tangible therapies that improve patient lives worldwide.
    Leonard Schleifer

    Leonard Schleifer - Board co-Chair, President & Chief Executive Officer

    Leonard Schleifer, the Board co-Chair, President & Chief Executive Officer at Regeneron, shapes the company's long-term vision and governance. Schleifer's dual role as Board co-Chair and Chief Executive Officer ensures robust oversight of Regeneron's strategic initiatives and commitment to scientific innovation. This leadership position involves guiding the company's efforts in discovering, developing, and commercializing novel medicines for serious diseases, including cancer, eye diseases, and inflammatory disorders. By championing the use of advanced science and proprietary technologies, Leonard Schleifer drives the creation of life-changing treatments. The Chief Executive Officer's responsibilities extend to fostering strong relationships with stakeholders and ensuring the company's continued growth and impact in the global biotechnology sector.
    Leonard Schleifer

    Robert Landry - Chief Financial Officer & Senior VP, Finance

    Robert Landry, the Chief Financial Officer & Senior VP, Finance at Regeneron, oversees the company's financial strategy and fiscal operations. Landry directs all aspects of financial planning, accounting, treasury, and investor relations, ensuring the financial health and sustainability of Regeneron's drug development and commercialization efforts. This leadership role is critical in allocating capital effectively to support research into life-changing medicines for serious diseases. By managing financial resources prudently, Robert Landry enables the company to pursue ambitious scientific goals and expand its global reach. The Chief Financial Officer's strategic financial management underpins Regeneron's capacity to innovate and deliver impactful therapies to patients worldwide.
    Robert Landry

    Peter Weber - Chief Marketing Officer

    Peter Weber, the Chief Marketing Officer at Regeneron, spearheads the strategic marketing initiatives for the company's innovative medicines. Weber directs the development and execution of comprehensive marketing plans designed to communicate the value of Regeneron's life-changing treatments for serious diseases to healthcare professionals and patients. This role involves understanding market dynamics, identifying key therapeutic areas, and crafting compelling narratives around scientific advancements. By overseeing brand strategy and market positioning, Peter Weber ensures that Regeneron's therapies reach those in need. The Chief Marketing Officer's efforts are crucial in translating scientific discoveries into accessible and impactful medical solutions, driving awareness and adoption across diverse patient populations and therapeutic areas.

    Wrechelle Nantes - Executive Assistant To the Chief Human Resources Officer

    Wrechelle Nantes, the Executive Assistant To the Chief Human Resources Officer at Regeneron, provides critical administrative and operational support to the Human Resources leadership. Nantes manages complex scheduling, coordinates executive communications, and facilitates the smooth functioning of the HR department's strategic initiatives. This role involves ensuring efficient workflow, preparing essential documentation, and acting as a key liaison for internal and external stakeholders. By maintaining organized operations, Wrechelle Nantes enables the Chief Human Resources Officer to focus on talent management, organizational development, and fostering a positive work environment. The Executive Assistant's contributions are vital to supporting Regeneron's commitment to its employees and its mission of developing life-changing medicines.

    Michelle DeSimone - Genetic Medicines Clinical Development Unit Chief of Staff

    Michelle DeSimone, the Genetic Medicines Clinical Development Unit Chief of Staff at Regeneron, drives operational efficiency and strategic alignment within the genetic medicines division. DeSimone coordinates critical projects, manages cross-functional communication, and supports the leadership in advancing the development of novel genetic therapies. This role involves ensuring seamless execution of clinical development plans, from early-stage research through regulatory submission. By optimizing resource allocation and streamlining processes, Michelle DeSimone enables the unit to accelerate the creation of life-changing treatments for rare and serious genetic diseases. The Chief of Staff's focus is on enhancing the unit's capacity to translate cutting-edge science into impactful patient solutions.

    Kim Brenner - Head Operations Strategy, To Chief of Staff & Executive VP, Regulatory, Patient Safety & Quality

    Kim Brenner, the Head Operations Strategy, To Chief of Staff & Executive VP, Regulatory, Patient Safety & Quality at Regeneron, shapes and implements strategic operational frameworks. Brenner directs the development of operational strategies that enhance efficiency and compliance across regulatory, patient safety, and quality assurance functions. This leadership position involves analyzing current operations, identifying areas for improvement, and designing scalable solutions to support Regeneron's mission of developing innovative medicines. By ensuring robust operational strategies, Kim Brenner contributes to the integrity and effectiveness of the company's drug development and commercialization processes. The Head of Operations Strategy's work is essential for maintaining high standards in patient safety and product quality.

    Stephanie Moult - Chief Marketing Officer & Chief Medical Officer

    Stephanie Moult, the Chief Marketing Officer & Chief Medical Officer at Regeneron, bridges scientific expertise with strategic market engagement. Moult directs both the clinical development and the commercialization strategies for Regeneron's therapeutic innovations. This dual role ensures that medical insights directly inform marketing efforts, creating a cohesive approach to bringing life-changing medicines to patients. By overseeing clinical trial execution and patient outcomes, Stephanie Moult guarantees the scientific rigor of the company's treatments. Simultaneously, the Chief Marketing Officer role drives market penetration and patient access. Moult's leadership integrates deep medical understanding with effective communication, accelerating the impact of Regeneron's therapies globally.

    Erick Honores - Director, Global Procurement & Chief Marketing Officer, Advanced Therapies

    Erick Honores, the Director, Global Procurement & Chief Marketing Officer, Advanced Therapies at Regeneron, manages critical supply chain functions and spearheads marketing for advanced therapeutic areas. Honores directs global procurement strategies to ensure the efficient acquisition of resources necessary for developing and manufacturing innovative medicines. Concurrently, as Chief Marketing Officer for Advanced Therapies, Erick Honores crafts and executes market strategies to introduce cutting-edge treatments for complex diseases. This dual focus ensures both operational readiness and effective market communication. Honores' leadership drives the successful delivery of Regeneron's most advanced therapeutic solutions to patients globally.
    Erick Honores

    Garvin Hyatt - Chief of Staff Regeneron

    Garvin Hyatt, the Chief of Staff Regeneron, provides strategic support and operational coordination across key leadership functions. Hyatt facilitates the execution of company-wide initiatives, manages cross-departmental projects, and ensures seamless communication between executive leadership and various teams. This role is integral to advancing Regeneron's mission of discovering and developing life-changing medicines by optimizing workflow and resource allocation. By streamlining operations and driving strategic alignment, Garvin Hyatt enhances the company's ability to bring innovative therapies for serious diseases from the laboratory to patients. The Chief of Staff's contributions are vital to maintaining momentum in Regeneron's pursuit of scientific breakthroughs.

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    Frequently Asked Questions Regarding Regeneron Top Executives and Leadership Team

    Who leads Regeneron?
    Regeneron is led by Leonard Schleifer (Co-Chair, President & Chief Executive Officer), along with executives such as Leonard Schleifer (Board co-Chair, President & Chief Executive Officer) and Robert Landry (Chief Financial Officer & Senior VP, Finance).
    Who is part of Regeneron’s executive team?
    The executive team of Regeneron includes leaders such as Leonard Schleifer (Co-Chair, President & Chief Executive Officer), Leonard Schleifer (Board co-Chair, President & Chief Executive Officer), Robert Landry (Chief Financial Officer & Senior VP, Finance) and other senior executives.
    How many executives does Regeneron have?
    Regeneron has 10 executives leading key business areas.
    What roles are included in Regeneron’s leadership team?
    The leadership team of Regeneron includes roles such as Co-Chair, President & Chief Executive Officer, Board co-Chair, President & Chief Executive Officer, Chief Financial Officer & Senior VP, Finance, Chief Marketing Officer, Executive Assistant To the Chief Human Resources Officer.