A wallet of unknown ownership sent 27,591 ETH, worth $67,468,648, to Coinbase Institutional in a large on-chain ether transfer to a major institutional trading venue. Separately, 168,658,701 USDC, valued at 168,656,677 USD, moved from Coinbase Institutional to Coinbase. Together the flows highlight sizable institutional-linked activity around Coinbase, though the source material does not identify the ETH sender or state the purpose of either transfer.