The company had reported a 36% jump in third-quarter net income, beating Wall Street’s predictions, late on Thursday.
Friday’s stock surge took Google’s market capitalisation to about $333 billion, which is still way behind technology industry rival Apple, the world’s largest company by market cap at $462 billion.
Google’s strong profit figures showed that its declining average ad prices are being offset by a more people clicking on ads.
The company’s stock has more than doubled in value in the last five years. But the stock has slipped slightly in recent months, while the overall market has risen, amid worries about deteriorating ad prices.
Having diversified beyond its powerful search engine, Google now includes video sharing site YouTube, and the popular Android operating system that runs on close to 1 billion smartphones and tablets.
The company ranks as the No. 1 digital ad company by revenue, leaving rivals such as Yahoo and Facebook far behind.