Ero Copper (ERO) reported Q3 adjusted earnings late Tuesday of $0.27 per diluted share, up from $0.18 a year earlier.
Analysts polled by Capital IQ expected $0.25.
Revenue for the quarter ended Sept. 30 rose to $124.8 million from $105.2 million a year earlier.
Three analysts surveyed by Capital IQ expected $133.1 million.
Separately, Ero Copper said that Chairman Noel Dunn will retire from the board, and Chief Executive David Strang will become the executive chairman.
The company named President and Chief Operating Officer Makko DeFilippo as CEO and president. Senior Vice President of Operations Gelson Batista will become the company's new COO.
Ero Copper said the changes will be effective Jan. 1.
The company's shares were down 2% in after-hours activity.
Price: 18.24, Change: -0.38, Percent Change: -2.04
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