Not a big deal, just as it was not that big a deal when they bought it.
This data is as of 3/31/16. Amarin was under $1.75 for virtually the entire quarter and on 3/31/16 was about $1.50. So if they did not buy back in early in April they missed the run up from there to over 3. Not so bright.
??? - nearly 4 months old info (more precisely 5 months as 3/31) - decrease of 1,403,850 and increase of 3,846,154+ (as Notes 2014) is a net increase of 2,442,304 acc. to most of the math ...