With less than a week to go not only before Apple's Worldwide Developers Conference keynote, but also a forthcoming 7-for-1 stock split, investors pushed shares of the iPhone maker to a new 52-week high on Tuesday.

Shares of Apple closed the day at $625.71, up $11.58 from their previous close of $614.13. That marked the highest closing price for AAPL stock in the last year.

Apple is still a long way off from its all-time high of just north of $700, reached in September of 2012. Following that, shares of Apple tumbled throughout late 2012 and early 2013.

The iPhone maker has mounted a major comeback in recent weeks, hot off the success of a strong second fiscal quarter of 2014, and riding high on investor anticipation for new products. Apple broke the $600 threshold earlier this month.

Apple's 52-week high also comes less than a week before shares of Apple are set to undergo a 7-for-1 split next Monday. Existing shareholders who buy in before the deadline will be awarded six additional shares of AAPL stock, and split-adjusted trading will begin on June 9.