Buffett is known for his long-term investment philosophies and willingness to hold winning stocks, even if they become significant portions of his portfolio. Just four winning stocks make up 57% of Berkshire Hathaway's $277 billion stock portfolio. Here they are, and why they are still excellent buy-and-hold candidates for any long-term investor.

Other fund managers also hold major stakes in Berkshire Hathaway Class B shares. BlackRock owns nearly 111.6 million Class B shares, roughly 8.3% of the total outstanding shares. State Street Corporation ranks high on the list as well, with nearly 71.7 million Class B shares making up 5.35% of the total.

In today’s CEO Daily: Shawn Tully on what Greg Abel will do now he has officially taken over from Warren Buffett at Berkshire Hathaway. The big story: U.S. and China agree to slash trade tariffs. The markets: Everything is up!