While Ren Tech reduced its stake in Class C shares by 31% during the third quarter to 282,060 shares valued at $171.61 million, the firm increased its holding in Class A shares by 371% to 257,648 shares valued at $164.48 million. Both classes of the tech giant's stock have posted gains above 30% since the start of this year. The company is now trying to get a slice of local advertising as it announced a partnership with IAC's HomeAdvisor, which entails that homeowners looking for contractors like plumbers or electricians will now be able to get HomeAdvisor screened and approved results. According to Neil Doshi, an analyst at Mizuho Securities, the local advertising is a $50 billion opportunity. Andreas Halvorsen 's Viking Global held about 2.74 million class A shares of Alphabet Inc (NASDAQ:GOOGL) and 1.15 million shares of the class C stock at the end of June.