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
Massey Energy to A. T. Massey Coal Company, initiating a period of significant growth through acquisitions. In 1992 Don Blankenship was appointed President, Chairman and CEO of A.T. Massey Coal Company; he served as the Chairman and CEO of Massey for 18 years. Blankenship oversaw continued company growth, including several more acquisitions and the establishment of several subsidiaries. A.T. Massey completed a reverse spin-off from Fluor Corporation in 2000 and was renamed Massey Energy Company. As of 2010, Massey Energy produced, processed, and sold bituminous coal of steam and metallurgical grades, primarily of low sulfur content, through its 22 processing and shipping