OMAHA, Nebraska AP – Billionaire Warren Buffett will likely use a few lines in his annual letter to Berkshire Hathaway shareholders to welcome new investors the company acquired along with BNSF railroad. But he’ll also have a busy year at the company’s 80-odd subsidiaries to explain when the letter is released this weekend.

The shareholder letter Buffett writes remains one of the best-read and most-quoted business documents every year because so many people follow Buffett, the so-called Oracle of Omaha.