Cleveland-Cliffs (CLF) reported a Q1 adjusted loss Wednesday of $0.92 per diluted share, swinging from profit of $0.18 a year earlier.
Analysts polled by FactSet expected a loss of $0.82.
Revenue for the quarter ended March 31 was $4.63 billion compared with $5.20 billion a year earlier.
Analysts surveyed by FactSet expected $4.63 billion.
Shares were down more than 9% in after-market activity Wednesday.