 Shares of Exelon Corp. EXC, 0.34 edged up 0.1 in premarket trading, to buck the selloff in the broader stock market, after the utility company reported a first-quarter profit that came up shy of forecasts while revenue was well above, and affirmed its full-year earnings outlook. Net income from continuing operations, fell to 481 million, or 49 cents a share, from 525 million, or 53 cents a share, in the year-ago period. 