Warren Buffett’s Berkshire invests in 4 pharma firms including Pfizer

Warren Buffett's Berkshire Hathaway on Monday said it has invested in stocks of four large drugmakers as of September 30. The firm disclosed investments of $1.8 billion each in AbbVie, Bristol Myers Squibb, Merck & Co and $136 million in Pfizer. Berkshire also added a $276 million stake in T-Mobile, bought more Bank of America stocks and cut Apple stocks.