Berkshire Hathaway first bought Apple ( AAPL 1.86%) shares in the first quarter of 2016. That was a wildly successful decision, as the "Magnificent Seven" stock has soared 797% since the start of that year (as of Jan. 31).

The late Senator Everett Dirksen once reportedly said, "A billion here, a billion there, and pretty soon you're talking about real money." With that quote in mind, Warren Buffett's dividend income this year will be real money.

Warren Buffett’s Berkshire Hathaway has spent another $54 million to purchase Sirius XM stock, giving it a stake of more than 35% in the satellite-radio company.