Tuesday’s movers: Omthera, Tesla Motors By: MarketWatch May 28, 2013 at 08:22 AM EDT Shares of Omthera Pharmaceuticals shares shot up nearly 100% in premarket trade on Tuesday while Tesla Motors and Tiffany shares attracted attention. Read More >> Related Stocks: Astrazeneca Plc ADR Canadian Solar Inc Exelon Corp Tesla, Inc. Tiffany & Co