No. 2 Samsung
Samsung has taken a piece of Apple's pie by more than doubling its tablet sales year-over-year, increasing from 12.4 percent of the market share last year to 20.4 percent at the end of the third quarter this year. The second most relevant brand across the globe, Samsung increased tablet shipments from 4.3 million devices in the third quarter of 2012 to 9.7 million devices in the third quarter of 2013. The company's Galaxy Tab and Galaxy Note series, offered in a wide variety of sizes and targeted at several specific verticals, all support a version of the Android operating system. According to IDC, much of Samsung's tablet shipments happen in conjunction with other Samsung products including smartphones and televisions.