What is the current stock price of Berkshire Hathway series A? What is its P/E ratio? Does it pay a dividend? Who is its CEO? What were the latest earnings per share? How does the financial performance of Berkshire Hathway compare to its competitors? What is its stock symbol? What stock exchange does it trade on? You may add any other financial information you would like to share about Berkshire Hathway series A.