What stocks/private companies do you wish BRK would have bought (or owned a majority of) in the last few decades?

I am salivating at the thought if BRK back in 2006, 2010, bought CMG and Panera respectively. Before Panera went private again their stock moves were insane. Those would have been clutch buys along with acquisition of Dairy Queen. Really cannot go wrong in the food department. What other companies do you wish they bought outright or had a major amount of shares accumulated?