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
Herb Pardes John J. Mack, chairman of the board of trustees, New York-Presbyterian Hospital, informed staff "that Dr. Herb Pardes has decided to retire at the end of 2011 as our President and Chief Executive Officer … While Dr. Pardes is stepping down as CEO at the end of 2011, the intention is that he will continue to play a vital role at the hospital beyond that time." In 2014, the Brain & Behavior Research Foundation announced a new Pardes Humanitarian Prize in Mental Health would be named in honor of Dr. Pardes for his profound impact on the lives of people