Berkshire buys Delta, more Alphabet; sheds Amazon, UnitedHealth, Visa and Mastercard
By Jonathan Stempel May 15 (Reuters) - Berkshire Hathaway on Friday disclosed a new $2.65 billion investment in Delta Air Lines and a small stake in Macy's, and said it sold many of its smaller stock holdings including Amazon.com, UnitedHealth Group, and the credit card networks Visa and Mastercard.