Interesting. 2982 BTC is not a huge amount to influence the price of Bitcoin. But these are only what you have identified. More may have taken action.
I wonder that what is their purpose?
Even if the purpose was to sell those coins in the market what is stopping them as they own the coin and 2982
BTC might not be a huge amount of coins to influence in the market what if these coins are shifted to future exchanges like bitmex, you could manipulate the market with the amount.