Why is this significant?
What, you mean you don't like watching whales do whale things? Lol.
In all seriousness though, people make stories out of these, and could potentially affect the market depending on the amounts involved. People may hold off on buying or sell early when they anticipate a large amount being dropped, for example. That's probably not as relevant these days considering how much money it takes to move the market, but that can probably be attributed to old habits dying hard.