PPL gains on first-quarter profit beat
** Shares of electric utility PPL Corp PPL.N gain 1.4% to $37.25 premarket ** Co beats estimates for first-quarter profit, driven by higher segment retail rates ** Quarterly earnings at its Kentucky segment rose 16.7% to 35 cents per share ** Posts adjusted profit of 63 cents per share, compared with analysts' average estimates of 62 cents per share ** As of last close, stock up 5% YTD (Reporting by Pranav Mathur in Bengaluru) ((Pranav.Mathur@thomsonreuters.com;))