The company is locked in a fierce battle with some formidable foes for share in the North American PC market, which is continuing to shrink. In the first quarter, Lenovo's U.S. PC shipments fell 4.8 percent on a year-over-year basis, but the company was still able to climb to the No. 3 spot, surpassing Apple, according to research firm Gartner. Its 1.6 million units shipped in the U.S. put it well behind the top two finishers, Dell and HP Inc., with 3.4 million and 3.3 million units shipped respectively, according to Gartner.