While total worldwide numbers have not been made available, WP now boasts an 8.2% share of the total OS market across EU5 markets (Germany, Great Britain, Italy, Spain and France). Moreover, the report posits Microsoft's OS as the the number two in Mexico, following a massive 10.5% increase to the current 12.5% share WP enjoys, overtaking Apple's iOS in the meantime. Speaking of Mexico, while traditionally a BlackBerry bastion, the OS from the company formerly known as RIM has dropped a whopping 25% year-on-year (though still sold slightly better than iOS).
So what about Android and iOS? While Android takes home a mind-numbingly large piece of the total pie, especially in European countries and China, it's actually losing traction in the US. iOS appears to have mounted a successful counter-charge, growing its sales to 43.4%, against Android's now diminished share of 51.1%.
Last in the race remains BlackBerry (well, Symbian, actually, but that one's definitely headed towards extinction), which now accounts for just 1.2% in the States, and a tad higher 2.4% in the aforementioned EU5 markets.
source: Kantar Worldpanel