Author: Sean Williams, The Motley Fool

These brand-name income stocks, with yields ranging from 4.8% to 6%, have been irresistible to billionaire investors.

A reasonably small amount of money can go a long way when it’s invested in time-tested businesses trading at a discount.

Right now, it stands out as historically inexpensive and ripe for the picking.

The Oracle of Omaha has consistently been using Berkshire Hathaway’s capital to buy shares of these three companies.

Portfolio concentration has played a sizable role in Buffett’s vast outperformance of the S&P 500.