Apple Inc. trades on the NASDAQ under the AAPL symbol. Apple incorporated on January 3, 1977 and went public on December 12, 1980 at $22 a share.
Although AAPL flirted with bankruptcy following the ouster of Steve Jobs, following Jobs return, a series of breakthrough products including iMac, iPod, iTunes, Apple Retail, iPhone, and iPad, and the subsequent succession by Tim Cook saw market cap surge past oil giants like Exxon to become the largest in the world, and its stock price exceed $700. AAPL has more recently been under considerable pressure, greatly reducing its price. Unlike other tech companies, Apple's price to earnings ratio is almost laughably small, and the market exhibits little confidence that the company that keeps re-inventing computing will ever be able to do it again. (Hey, who said markets were rational?)