comScore, Inc, a leader in measuring the digital world, today released data from the comScore MobiLens service, reporting key trends in the U.S. smartphone industry during the three month average period ending March 2013. Apple ranked as the top smartphone manufacturer with 39 percent OEM market share, while Google Android led as the #1 smartphone platform with 52 percent platform market share.

Smartphone OEM Market Share

136.7 million people in the U.S. owned smartphones (58 percent mobile market penetration) during the three months ending in March, up 9 percent since December. Apple ranked as the top OEM with 39 percent of U.S. smartphone subscribers (up 2.7 percentage points from December). Samsung ranked second with 21.7 percent market share (up 0.7 percentage points), followed by HTC with 9 percent, Motorola with 8.5 percent and LG with 6.8 percent.

Smartphone Platform Market Share

Google Android ranked as the top smartphone platform with 52 percent market share (71.1 million subscribers), while Apple’s share increased 2.7 percentage points to 39 percent (53.3 million subscribers). BlackBerry ranked third with 5.2 percent share, followed by Microsoft (3 percent) and Symbian (0.5 percent).