Stewart John Hen

Warburg Pincus LLC (Warburg Pincus) is a private equity subsidiary of Warburg Pincus & Company US LLC founded in 1966. The firm is headquartered in New York.

Neurogen Corp. operated as a drug discovery and development company. The company was headquartered in Branford, CT.

Altus Pharmaceuticals, Inc. develops therapeutic products for gastrointestinal and metabolic diseases. Its principal activity is protein crystallization which is used to develop therapeutic products for gastrointestinal and metabolic diseases. The company was founded in October 1992 and is headquartered in Waltham, MA.

Allos Therapeutics, Inc. is a biopharmaceutical company committed to the development and commercialization of innovative anti-cancer therapeutics. It focuses on the development and commercialization FOLOTYN a pralatrexate injection. FOLOTYN is a folate analogue metabolic inhibitor designed to accumulate preferentially in cancer cells. It targets the inhibition of dihydrofolate reductase, or DHFR, an enzyme critical in the folate pathway, thereby interfering with DNA and RNA synthesis and triggering cancer cell death. Allos Therapeutics is also developing FOLOTYN in other hematologic malignancies and solid tumors. The company was founded on September 1, 1992 and is headquartered in Westminster, CO.

Melinta Subsidiary Corp. develops and markets pharmaceutical products for the treatment of life-threatening infections. It also develops novel classes of antibiotics to treat the multi- and extremely-drug-resistant pathogens for which there are few to no options, known collectively as ESKAPE pathogens. The company was founded by John N. Abelson, Harry F. Noller, Susan Froshauer, Harry H. Penner, Jr., William L. Jorgensen, Thomas A. Steitz, and Peter Moore in October 2000 and is headquartered in New Haven, CT.

Alita Pharmaceuticals, Inc. develops, manufactures and distributes urologic and female healthcare products. It offers product testing, research and development services. The company was founded by Carole S. Ben-Maimon and Warburg Pincus in September 2006 and is headquartered in Radnor, PA.

Prestwick Pharmaceuticals, Inc. develops drugs for diseases related to the central nervous system. Its drugs are used in curing diseases such as Huntington's, Parkinson's, restless legs syndrome, schizophrenia, autism, Alzheimer's, and sleep apnea diseases. The company was founded in 2002 and is headquartered in Washington DC.