Nyxoah (NYXH) reported a Q4 loss late Thursday of 0.59 euros ($0.68), widening from a loss of 0.46 euros a year earlier.
Analysts polled by FactSet expected a loss of 0.45 euros.
Revenue for the quarter ended Dec. 31 was 5.6 million euros, up from 1.3 million euros a year earlier.
Analysts surveyed by FactSet expected 10.9 million euros.