Babcock & Wilcox Enterprises (BW) reported a Q1 loss Monday of $0.60 per diluted share, widening from a loss of $0.26 a year earlier.
Three analysts surveyed by FactSet expected a loss of $0.03.
Revenue for the quarter ended March 31 was $214.4 million, up from $148.6 million a year earlier.
Three analysts surveyed by FactSet expected $149.7 million.
Shares were up 23% in Monday's premarket activity.