Billionaire investor Warren Buffett announced Saturday that a successor has been chosen to lead his Berkshire Hathaway holding company, although he did not identify the person. Buffett, 81, wrote in a letter to investors that Berkshire Hathaway’s board of directors chose his successor and two back-up candidates.

Your Board is equally enthusiastic about my successor as CEO, an individual to whom they have had a great deal of exposure and whose managerial and human qualities they admire. (We have two superb back-up candidates as well.) When a transfer of responsibility is required, it will be seamless, and Berkshire’s prospects will remain bright. More than 98% of my net worth is in Berkshire stock, all of which will go to various philanthropies. Being so heavily concentrated in one stock defies conventional wisdom. But I’m fine with this arrangement, knowing both the quality and diversity of the businesses we own and the caliber of the people who manage them. With these assets, my successor will enjoy a running start. Do not, however, infer from this discussion that Charlie and I are going anywhere; we continue to be in excellent health, and we love what we do. – Warren Buffet