Zynga execs resign, Apple extends gains By: MarketWatch August 14, 2013 at 11:52 AM EDT Online gaming company Zynga says COO, other executives resign. Apple gets closer to $500 a share in wake of Carl Icahn saying he’s taken a stake in the company. Read More >> Related Stocks: Apple Cree Inc Facebook Google, Inc. Hewlett-Packard International Business Machines Microsoft Netflix Oracle Corp PHLX Semiconductor Sector Index Pandora Media Inc Yahoo Zynga Inc Cl A