I.W. Tremont Co., Inc.

I.W. Tremont Co., Inc. is a US-based manufacturer of analytical and diagnostic filtration products specializing in glass microfiber and high purity cellulose media with emerging advanced materials capabilities. Founded in 1979, the company serves laboratory distributors, analytical instrument manufacturers, IVD and medical device manufacturers, and technical markets as a private label and OEM supplier of filter media. The company offers a wide range of products including qualitative and quantitative cellulose filter papers, specialty glass microfiber media (MultiDensity™, D-23®, NanoGF™), cellulose extraction thimbles, syringe filters, and membranes. I.W. Tremont is ISO 9001:2015 registered with TUV Rheinland and GMP compliant. The company operates from its headquarters in Hawthorne, New Jersey, and serves three primary markets: Analytical, OEM and Industrial. In July 2025, I.W. Tremont acquired the complete assets of Filter Holdings, Inc., expanding its capabilities in the specialty filtration market.