** Shares of refiner Marathon Petroleum MPC.N jump ~3% to $260 premarket
** Co beats Q1 profit estimates, benefiting from stronger refining margins amid tighter global supply driven by the Middle East war
** Posts adjusted profit of $1.65 per share vs. analysts' average estimates of 75 cents per share - data compiled by LSEG
** MPC's refining and marketing margin stood at $17.74 per barrel during the reported quarter, compared with $13.38 per barrel a year earlier
** As of last close, MPC up 55.3% YTD
(Reporting by Dharna Bafna in Bengaluru)
((dharna.bafna@thomsonreuters.com))