Maybe but IMHO its more likely a hedge fund following the same disclosures you unearthed ( great work by the way ) and saw AMRN was doing everything required for UK approval ( note requirement to ensure creditors are protected ) .....looked at their balance sheet , cash on hand etc ...UK won't approve a share buyback for more then 25% of cash on hand ... Fund ( this is a specialist shop ) figures buy back is going to be approved . AMRN has done all that the UK regulator requires ....so buy in advance
Which means once AMRN PR's the approval ...it might be a sell the news event JMO Kiwi