According to @BitMEXResearch, more than 82,300 ETH from The DAO refunds remain unclaimed (about $375 million) plus over 70,000 ETH in the Extra Balance contract (about $322 million), based on the Etherscan contract data referenced in the post (source: @BitMEXResearch; Etherscan). @BitMEXResearch also reports roughly 1.3 million Ethereum Classic (ETC) from the same legacy claims remain unclaimed (source: @BitMEXResearch). The concentration of these dormant balances is material for on-chain monitoring, and traders can track the DAO refund and Extra Balance contract addresses highlighted in the post for any large movements (source: @BitMEXResearch; Etherscan).