Peabody Energy (BTU) reported a Q2 loss Wednesday of $0.74 per diluted share, widening from a loss of $0.23 a year earlier.
Three analysts surveyed by FactSet expected a loss of $0.57 per share.
Revenue for the quarter ended June 30 was $1.0 billion, up from $890.1 million a year earlier.
Analysts expected $1.02 billion.
Shares of the company were down nearly 11% in Wednesday premarket activity.