TransAlta (TAC) reported Q1 net earnings Wednesday of CA$0.15 ($0.11) per share, down from CA$0.72 a year earlier.
Analysts polled by FactSet expected C$0.11.
Revenue for the quarter ended March 31 was CA$758 million, down from CA$947 million a year earlier.
A single analyst surveyed by FactSet expected CA$733 million.
The company's shares were down 1.5% in recent premarket activity.
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