MOUNTAIN VIEW, California: Google's rampant success in the world of web search and the increasing migration of advertisers online have propelled the company's share price through the $600 (€427; £295) barrier.

Investors have high hopes for the online titan's third-quarter earnings, due to be announced next week, and this latest surge places Google's market value at around $187 billion.

The company is now worth more than more than Wal-Mart, Coca-Cola, Hewlett-Packard and IBM. It was floated just over three ago at $85 per share.

Google's founders, Larry Page and Sergey Brin, are now worth more than $17bn each.

Data sourced from Financial Times Online; additional content by WARC staff