CENTER VALLEY, PA – The merger of Avantor™ Performance Materials and NuSil™ Technology LLC has been successfully completed. Terms of the transaction were not disclosed.

Michael Stubblefield, who has served as CEO of Avantor Performance Materials since 2014, will serve as CEO of the combined entity. New Mountain Capital, the majority owner of both legacy companies, remains as the majority owner post-merger.

Avantor provides performance materials and solutions for the production and research needs of more than 6,500 customers across the biotechnology, pharmaceutical, medical device, diagnostics, aerospace and defense, and semiconductor industries. The company’s product portfolio includes more than 30,000 products. Its performance chemistries include the J.T.Baker®, Macron Fine Chemicals™, Rankem™, BeneSphera™, and POCH™ brands. Avantor’s brands of advanced silicones include the NuSil, Trelyst, CareSil and MediSil.