Investor confidence in the company is also strong. Warren Buffett's firm, Berkshire Hathaway (NYSE: BRK.B), has made a significant investment in Alphabet. As reported by Benzinga, Buffett personally initiated the purchase. Berkshire now holds over 54.2 million GOOGL shares valued at $15.6 billion and a separate $1 billion stake in GOOG shares. Alphabet's stock has a current market capitalization of approximately $4.5 trillion. Market capitalization is the total market value of a company's outstanding shares ...