Buenaventura (BVN) reported Q1 non-GAAP earnings Thursday of $0.55 per share, up from $0.24 a year earlier.
An analyst polled by FactSet expected $0.25.
Revenue for the quarter ended March 31 was $307.7 million, up from $246.8 million a year earlier.
Three analysts surveyed by FactSet expected $296.9 million.