BlackRock transferred approximately $443.88 million in Bitcoin and Ethereum to Coinbase Prime within a 30-minute window on November 12. The asset manager moved funds from its ETF wallets, including 4,189 BTC (worth about $304.72 million) and 68,230 ETH (worth about $139.16 million). The transfer was flagged by blockchain monitoring service Onchain Lens. Large movements of assets from ETF custodial wallets to exchange platforms like Coinbase Prime often signal rebalancing or liquidity operations tied to fund inflows and outflows.