I don't think Buffett invests in Union Pacific. His company fully owns BNSF which holds a duopoly with Union Pacific in the Western United States. It looks lik

I don't think Buffett invests in Union Pacific. His company fully owns BNSF which holds a duopoly with Union Pacific in the Western United States. It looks like Buffett owned Union Pacific shares a while back, but sold them in 2009 so that they could buy BNSF.