Whale 0x5de...d57 borrowed a total of 19 million UNI from Aave and Compound in the last 33 hours, and then bought 4,952 ETH at an average price of $3,837.
This whale holds a lot of ETH, reaching 26,728 ($103M), but a considerable part of it is bought through leverage: he has $66.35 million in stablecoin loans from Aave and Compound.
In addition, he also sold 402,875 UNI ($2.75M) at $6.83 on 4/17. At that time, UNI was notified by the U.S. SEC's Wells on Uniswap, and the price of UNI fell from $11.6 to $5.9. He sold at the bottom of the market, and now the price of UNI has returned.
Address: 0x5de64f9503064344db3202d95ceb73c420dccd57