Avantor CEO Michael Stubblefield to step down upon successor appointment

Avantor, Inc.

Stubblefield to step down as CEO and from board; will remain non-executive advisor until Feb 28, 2026.
Transition agreement signed April 24; he continues in current role until successor named or End Date.
Eligible for involuntary separation payments under existing employment agreement if employed through End Date.

item 5.02 item 8.01 item 9.01

Executive movements

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Departed

Michael Stubblefield

Director, President and Chief Executive Officer

AVTR · Avantor, Inc.

Filed: April 28, 2025, 7:59 PM ET

Michael Stubblefield and Avantor, Inc. (the “Company”) agreed to initiate a leadership transition and Mr. Stubblefield agreed to step down from his role as Director, President and Chief Executive Officer of the Company, effective upon the appointment of his successor.

Key facts

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Executive change SEC 8-K Item 5.02 confidence 0.95

Michael Stubblefield departed as Director, President and Chief Executive Officer at Avantor, Inc..

Action: step down
Role: Director, President and Chief Executive Officer

Exact text from the filing

Michael Stubblefield and Avantor, Inc. (the “Company”) agreed to initiate a leadership transition and Mr. Stubblefield agreed to step down from his role as Director, President and Chief Executive Officer of the Company, effective upon the appointment of his successor.

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Avantor, Inc. filing history →

Source: SEC EDGAR

accession 0001722482-25-000087

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