Alphabet公司（英语：Alphabet Inc.）是一家设在美国加州的控股公司，于2015年10月2日成立，公司前身为Google。公司重整后，Google成为Alphabet Inc.之最大子公司。此外，Alphabet旗下拥有Verily、Google X、Google Fiber、Google Ventures、Google Capital、Calico和Nest Labs七家子公司。原有「GOOG」及「GOOGL」的股票代号保持不变。

Alphabet Inc. (commonly known as Alphabet, and frequently informally referred to as Google) is an American multinational conglomerate created in 2015 as the parent company of Google and several other companies previously owned by Google. The company is based in Mountain View, 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, GV, Google Capital, X, and Google Fiber. Some of the subsidiaries of Alphabet have altered their names since leaving Google—Google Ventures becoming GV, Google Life Sciences becoming Verily and Google X becoming just X. 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".