Marinus Pharmaceuticals, Inc. is a biopharmaceutical company, which engages in the identification and development of neuropsychiatric therapeutics. Its clinical stage drug product candidate, ganaxolone, is a positive allosteric modulator being developed in three different dose forms: intravenous, capsule, and liquid. The company was founded by Geoffrey E. Chaiken, Harry H. Penner Jr., Vincent A. Pieribone and Kenneth R. Shaw on August 14, 2003 and is headquartered in Radnor, PA.