New York, New York--(Newsfile Corp. - November 17, 2025) - WHY: Rosen Law Firm, a global investor rights law firm, reminds purchasers of common stock of Avantor, Inc. (NYSE: AVTR) between March 5, 2024 and October 28, 2025, both dates inclusive (the "Class Period"), of the important December 29, 2025 lead plaintiff deadline.SO WHAT: If you purchased Avantor common stock during the Class Period you may be entitled to compensation without payment of any out of pocket fees or costs through a contingency fee a ...