Alphabet Inc. (commonly known as Alphabet and stylized as Alphabet) is an American multinational conglomerate created in 2015 as the parent company of Google and several other companies previously owned by or tied to Google. The company is based in California and headed by Google's co-founders, Larry Page and Sergey Brin, with Page serving as CEO and Brin as President. The reorganization of Google into Alphabet was completed on October 2, 2015. Alphabet's portfolio encompasses several industries, including technology, life sciences, investment capital, and research. Some of its subsidiaries include Google, Calico, Google Ventures, Google Capital, Google X, and Nest Labs. Following the restructuring Page became CEO of Alphabet while Sundar Pichai took his position as CEO of Google. Shares of Google's stock have been converted into Alphabet stock, which trade under Google's former ticker symbols of "GOOG" and "GOOGL".
The establishment of Alphabet was prompted by a desire to make the core Google internet services business "cleaner and more accountable" while allowing greater autonomy to group companies that operate in businesses other than internet services.