Repligen Corp. is a global life sciences company, which engages in providing bioprocessing technologies and solutions used in the process of manufacturing biological drugs. The company is headquartered in Waltham, Massachusetts and currently employs 2,000 full-time employees. Its franchises include filtration, chromatography, process analytics and proteins. Its filtration franchise includes product offering covering upstream and downstream technologies. Its filtration products include XCell Alternating Tangential Flow (ATF) Cell Retention Systems, Flat Sheet Cassettes, Hollow Fiber Consumables, Tangential Flow Filtration Systems and Fluid Management. Its chromatography franchise includes products used in downstream purification, development, manufacturing and quality control of biological drugs. Its chromatography franchise includes OPUS Pre-Packed Columns, KRM Chromatography Systems and other additional chromatography products. Its process analytics include Downstream process analytical technology (PAT) and Upstream PAT. Its Proteins include Protein A Affinity Ligands, AVIPure Resins for New Modalities and Growth Factors.