Renren Inc - RENN - reported the release of its customized high-definition client application (”Renren HD”) for Microsoft’s Windows 8 application store. Renren HD is the first social networking application selected by Microsoft. Arena Pharmaceuticals Inc - ARNA - reported the filing of a Marketing Authorization Application with the European Medicines Agency for lorcaserin, an investigational drug candidate intended for weight control. Kratos Defense & Security Solutions Inc - KTOS - reported that its Herley EW Simulation Technology Limited subsidiary has received a single award contract valued at $9.4M from an international customer for the supply of two of its highly successful RSS8000 Radar Threat Simulator products.