bitcoin surge happens when fiat moves to exchanges and if whales were behind it then you had to look at their bank accounts where they trasfer fiat to buy bitcoin increasing its price, not the bitcoin blockchain!!!
It is not necessary for some whales to use their banks. For example if they had their funds already on exchanges. This might be a typical behaviour for some asian traders.
But if recent pump happened because of whales then they either they are carefully hiding their transactions or it is just a good market conditions for growth. There could be no point in hiding your purchase of you were an established company.