BlackBerry maker Research In Motion holds the biggest market share of all the U.S. smartphone platforms, with a 41.6% share—down from 42.6% in September 2009. Apple came in second with 25.3%, up 1.2%. Microsoft came in third, with 18% of the market, down 1%, followed by Palm accounting for 6.6% of the market, down from 8.3%. Google placed fifth with a 5.2% share, up 2.7% from September. The report ranked smartphone operating system platforms in the U.S. according to their share of current mobile subscribers age 13 and older.