Adds comments from Nordnet economist, ALM. Brand
** Nordic insurers Tryg TRYG.CO, Sampo SAMPO.HE and ALM. Brand ALMB.CO turn lower after financial news outlet Boersen reports that Denmark's Supreme Court has ruled in a workplace injury case with potentially major implications for the industry
** Nordnet economist Per Hansen says the ruling fuels uncertainty over potential compensation liabilities, prompting investors to sell insurance stocks
** He adds insurers may absorb costs in the short term, but higher premiums are likely over time
** Tryg expects a one-off pretax hit of DKK 1.2 billion ($187.83 million) from the ruling, but says shareholder payouts and its 2027 targets are unaffected
** ALM. Brand ALMB.CO says it will book a one-off charge of DKK 0.7 billion in Q2 to strengthen reserves following the ruling, and cuts its 2026 insurance service result guidance
** Sampo says it is in a silent period and will comment when it reports results on May 6
** Tryg, Sampo and ALM. Brand shares down as much as 5.7%, 3.4% and 8.5%, respectively, before paring some losses
($1 = 6.3887 Danish crowns)
(Reporting by Samuel Indyk, Danilo Masoni, Agnieszka Gościak-Rąbalska, Vera Dvorakova)