After US markets closed on 2 October 2015, Alphabet replaced Google as the publicly traded company that will house Google's search and Web advertising businesses, maps, YouTube and its "moonshot" ventures such as driverless cars. Google’s class A shares and class C shares automatically converted into the same number of Alphabet class A shares and class C shares and started trading on the Nasdaq from 5 October 2015. The ticker symbols will not change. The structural overhaul, announced in August 2015, is intended to separate the company's core businesses from ventures such as the driverless cars, glucose monitoring contact lenses and Internet-connected high-altitude balloons