Apple has regained its status as a trillion dollar company by market cap, which is its total outstanding shares multiplied by its stock price.
Apple achieved this milestone by hitting a stock price above $221.28 in intraday trading today, giving it a market cap slightly over $1,000,000,000,000 based on its 4,519,180,000 outstanding shares as of July 19, 2019, which the company disclosed in its most recent quarterly 10-Q filing with the SEC.
Read more at MacRumors.com