Moving the company and headquarters may be easier than you´d think, since it´s a separate company, Norwegian Long Haul A/S. Do not underestimate Björn Kjos, the CEO. He´s been doing remarkably well so far.
Going by the posts here, entrepreneurs like that are not welcomed in Norway, he should just pick up sticks and move the whole lot to Ireland, they would welcome him with open arms.
He probably does not give a toss where he is based.