While Apple accounts for over 28% of Berkshire's portfolio, Buffett only began buying it in the first quarter of 2016. That makes it a relative newcomer compared to three other iconic names Buffett picked up way back in the first quarter of 2001 – and still hasn't let go of. With the Berkshire Hathaway portfolio holding onto these shares for over two decades, these positions reveal how Buffett's best investments aren't always the flashiest – they're the most enduring. Read Also: Warren Buffett Says He Is 'E ...