A large Ethereum whale has been actively accumulating and trading significant amounts of ETH in recent days. Starting on August 11, 2025, the whale purchased 49,533 ETH valued at $211.5 million, increasing its holdings to approximately $950 million. Over the following days, this entity created multiple new wallets, accumulating a total of 312,052 ETH worth $1.34 billion. Concurrently, a wallet linked to the Ethereum Foundation, identified as 0xF39d, has been selling ETH steadily. Since August 13, this wallet sold a total of 7,294 ETH valued at $33.25 million at an average price of around $4,558 per ETH. The wallet originally received 20,756 ETH from the Ethereum Foundation's "EF 1" wallet in 2017. Additionally, in the past four days, an institution withdrew 92,899 ETH worth $412 million from Kraken exchange through three newly created wallets. The Ethereum Foundation-linked wallet has also recently received 3,000 ETH worth $13.69 million, which is expected to be sold soon. Overall, these movements indicate substantial trading activity involving large ETH holdings by both the Ethereum Foundation-linked wallet and a mysterious whale creating multiple wallets and accumulating hundreds of millions of dollars in ETH.