Vale (VALE) reported a Q4 net loss Thursday of $0.90 per diluted share, widening from a $0.16 loss a year earlier.
Net operating revenue for the quarter was $11.06 billion, compared with $10.12 billion a year earlier.
Analysts polled by FactSet expected $11.01 billion.
The company's shares were down 1.3% in recent premarket activity Friday.