Warren Buffett Says He Has Prostate Cancer But "Feels Great" Credit: Daniel Acker/Bloomberg/Getty Images Billionaire businessman Warren Buffett told shareholders that he has stage I prostate cancer in a letter on Tuesday afternoon. Buffett, 81, said his doctors said his condition "is not remotely life-threatening or even debilitating in any meaningful way." The CEO and chairman of Berkshire Hathaway said he received his diagnosis last Wednesday. He and his doctors have decided on a two-month treatment of daily radiation that will begin in mid-July, restricting travel but not his daily routine, he wrote. "I feel great - as if I were in my normal excellent health - and my energy level is 100 percent," he wrote. A leader entwined with his company's identity, Buffett said in February he and Berkshire Hathaway's board have identified a successor. Though Buffett has said the successor does not know he or she has been selected. Called "The Oracle," for his business acumen, Buffett has remained silent about his succession plan despite investors who have pushed for more information.