Larry Page using Android software and, by 2010, 17.2% of the handset market consisted of Android sales, overtaking Apple for the first time. Android became the world's most popular mobile operating system shortly afterward. Following a January 2011 announcement, Page officially became the chief executive of Google on April 4, 2011, while Schmidt stepped down to become executive chairman. By this time, Google had over $180 billion market capitalization and more than 24,000 employees. After Schmidt announced the end of his tenure as CEO on January 20, 2011, he jokingly tweeted on Twitter: "Adult-supervision no longer needed." Quartz organizational management reporter, Max
Stuart Gulliver then Group Chairman of HSBC, announced that he would step down, in order to accept the invitation of the UK Prime Minister to become Minister of State for Trade and Investment in January 2011. As a result of Stephen Green's decision to step down earlier than planned, Michael Geoghegan, the then Group CEO of HSBC, announced his retirement and Stuart Gulliver, who led HSBC's investment-banking division since 2006, was appointed as the new Group CEO of HSBC Holdings plc, effective 1 January 2011. He was also appointed the Chairman of The Hongkong and Shanghai Banking Corporation Limited, a wholly owned