California: Tech giant Google appointed Indian-origin Sundar Pichai as the chief executive officer (CEO) of Alphabet, replacing Sergey Brin as the head of the parent firm.

Alphabet was established in 2015 as a "collection of companies" that separates Google from Other Bets which are not part of its core businesses like Waymo (self-driving cars), Verily (life sciences), Calico (biotech R&D), Sidewalk Labs (urban innovation) and Loon (rural internet access via balloon).

Google co-founders Larry Page and Brin, the CEO and president of Alphabet, will continue their involvement as co-founders, shareholders and members of Alphabet's Board of Directors.

On the other hand, Pichai has become the CEO of both Google and Alphabet. He will assume the role of managing the Alphabet's investment in its portfolio of Other Bets. Pichai will remain a member of the Alphabet's Board of Directors.

"With Alphabet now well-established, and Google and the Other Bets operating effectively as independent companies, it's the natural time to simplify our management structure. We have never been ones to hold on to management roles when we think there's a better way to run the company. Alphabet and Google no longer need two CEOs and a President. Going forward, Sundar will be the CEO of both Google and Alphabet," Page and Brin said in a statement.

"He (Pichai) will be the executive responsible and accountable for leading Google and managing Alphabet's investment in our portfolio of Other Bets. We are deeply committed to Google and Alphabet for the long term and will remain actively involved as Board members, shareholders and co-founders. In addition, we plan to continue talking with Sundar regularly, especially on topics we are passionate about!" they added.

In 2015, Pichai was appointed as Google CEO replacing Page, who led the newly formed Alphabet that came into existence in that year.