Google's share price topped $800 for the first time today amid renewed confidence in its ability to reap steadily higher profits from its dominance of Internet search and prominence in the increasingly important mobile device market.

The milestone comes more than five years after Google's shares initially barreled through $700.

But not long after breaking that barrier in October 2007, the US economy collapsed into the worst recession since World War II.

Google's stock tumbled into a prolonged malaise that eventually led to a change in leadership.

Besides enriching Google's employees and other shareholders, the company's resurgent stock is an implicit endorsement of co-founder Larry Page.

Google's stock has now risen by about 35% since Page replaced Eric Schmidt as chief executive in April 2011.