** Shares of Delta Air Lines DAL.N and department store operator Macy’s M.N rise premarket while health insurer UnitedHealth UNH.N falls after Berkshire BRKa.N disclosed portfolio changes
** DAL and M climb 2.5% and 5.6%, respectively, after BRKa revealed a $2.65 bln investment in Delta and a smaller stake in Macy’s after markets closed on Friday.
** Berkshire said it also more than tripled its stake in Alphabet GOOGL.O; at $16.6 bln, the stock is now among the firm's largest common stock investments
** Added that it also more than doubled holding in the New York Times NYT.N, owning 9.4% of the publisher
** Filing shows BRKa bought $15.94 bln and sold $24.09 bln of stocks during January to March
** Berkshire exited or trimmed several positions, including Amazon AMZN.O, UnitedHealth UNH.N, Visa V.N and Mastercard MA.N
** UNH fell 5.1%
** The changes in the portfolio were part of first-quarter reshuffling that followed the promotion of Greg Abel to succeed Warren Buffett as Berkshire's CEO
(Reporting by Tharuniyaa Lakshmi in Bengaluru)
((tharuniyaa@thomsonreuters.com))