Following the announcement of the tax, the share price initially fell significantly, as Norway is Mowi's largest and most profitable market and the increase represented a risk for Mowi.

Source: https://seekingalpha.com/article/4659349-mowi-asa-the-future-of-fish-farming?source=feed_all_articles

However, with Mowi's size and scale, they can afford to have 1-2 segments that don't operate at the same superbly high level as others, while trying to improve them.

Source: https://seekingalpha.com/article/4638369-mowi-stock-eventually-this-will-stop-going-nowhere-i-say-buy?source=feed_all_articles