Denison Mines (DNN) reported a Q1 loss late Monday of CA$0.05 ($0.04) per diluted share, wider than a loss of CA$0.02 a year earlier.
Analysts polled by FactSet expected a loss of CA$0.02.
Revenue for the quarter ended March 31 was CA$1.4 million compared with CA$832,000 a year earlier.
An analyst surveyed by FactSet expected CA$1.1 million.