Songa Holding, the key company owned by Norwegian investor Arne Blystad, has revealed a slide in profit margin amid slumping revenues in its shipping business.

A just-released financial report shows Songa Holding posted a pre-tax profit of NOK 502m ($62.5m) against a NOK 825m profit in 2016. Net profit dropped to nearly NOK 517m from just under NOK 779m a year earlier.