The sale of the West Link toll bridge in Dublin has boosted NTR's profits for the six months to the end of September, but profits fell when this was stripped out.
Operating profits of €426.8m included an exceptional pre-tax gain of €420.4m from the sale of the West Link toll facility to the State.
But operating profits before this were €6.5m, down from €9.4m a year earlier. This reflected strong performances from its wind energy business Airtricity and waste business Greenstar, but there were losses in its Bioverda subsidiary due a 'difficult' biodiesel market in Germany.
NTR has announced a 10% higher interim dividend of 1.82 cent.
Airtricity recently announced the sale of its North American business.