Google's Co-founders Larry Page and Sergey Brin have added $3.5 billion to their combined wealth since Thursday, after Google's parent Alphabet released its third-quarter earnings report. Larry Page's net worth is now $48.2 billion and Sergey Brin's is $46.9 billion. Notably, at least 5 of top 10 names on Forbes list of World's Billionaires are founders of US technology companies.