The search giant closed at US$806.85 on the Nasdaq exchange, up 1.8 percent from Friday, having hit a high of US$807 during the day.
Shares have risen 33 percent over the last year, and 14 percent from the beginning of 2013. Last month the company reported fourth-quarter profit increases of 6.7 percent from a year earlier. Google’s earnings grew by 10 percent to US$10.74 billion, with revenues of more than US$50 billion.
The company’s Android operating system has been dominating smartphone sales, while it also recently announced it was to sell advertisements on Yahoo!
Google still faces challenges, however, with a Harvard University study finding Google adverts could be racially biased and Microsoft running a negative advertising campaign against the company’s use of personal data.
