According to Lookonchain, 893,599 ETH (about $3.96B) is currently queued for unstaking based on ValidatorQueue data, source: Lookonchain; ValidatorQueue. Lookonchain reports that whale address 0x2aC9 swapped 4,242.4 stETH for 4,231 ETH and deposited the 4,231 ETH (about $18.74M) to Kraken to sell, source: Lookonchain; Arkham Intel. Based on those reported amounts, the trade realized an 11.4 ETH loss (about $50.5K), implying roughly a 0.27% stETH to ETH discount at execution, source: Lookonchain. The direct exchange deposit indicates immediate spot sell flow on Kraken as stated by the tracker, source: Lookonchain.