Visit the Nasdaq website, and type AAPL into the search bar on Nasdaq's Real Time Quotes page to find the current value of Apple stock. Apple's Investor Relations section also has stock price information on its Stock Price page. However, this price is always 20 minutes old, notes Apple.
Apple stock trades on the Nasdaq Global Select Market, according to Apple. The company does not sell stock directly but makes it available through brokerage firms.
As of 2015, if a registered shareholder loses his stock certificates, wants to transfer ownership, or needs to change his contact information, he contacts Computershare Investor Services. Other investors make such changes through their brokerage firms, states Apple.