On October 13, 2025, Avantor, Inc. announced that Gregory L. Summe, a current independent director, will serve as the company’s next Chairman of the Board, effective January 1, 2026. The announcement also stated that Jonathan Peacock will step down as Chairman and as a director at the end of 2025 after nearly nine years of service.
Gregory L. Summe brings extensive experience as a former CEO and board member in the tools and life‑sciences sector. He has served on Avantor’s Board since 2020, chairing the Nominating and Governance Committee and participating on the Compensation Committee, positioning him to lead the board’s oversight of strategy and governance.
The transition follows the appointment of Emmanuel Ligner as CEO and the addition of Greg Lucier to the board. The change reflects Avantor’s ongoing effort to align its governance structure with its strategic focus on growth and profitability, and it signals continuity in leadership while preparing for the next phase of the company’s transformation.
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