Google is a traded on an open market organization, so there are in fact a large number of 'proprietors' or individuals who claim partakes in the organization. The biggest investors are Larry Page, Sergey Brin and Eric Schmidt who possess 27.4%, 26.9% and 5.5% of the organization, individually, as of April 6, 2015.
Insiders own almost all of the Class B shares: Larry Page and Sergey Brin each own a bit over 40% of the Class B shares, giving each of them therefore about 27% voting power. Eric Schmidt has a pretty big pile as well. But no individual has 50% voting power.