According to @ai_9684xtpa, Grayscale has allegedly commissioned Flow Traders to sell 5,812 ETH (worth $21.75 million), possibly to cover management fees for their Ethereum Trust Fund. Grayscale charges a 2.5% management fee annually for ETHE, which, based on their current holding of 2.97 million ETH, generates 74,000 ETH in annual revenue (approximately $280 million). It's quite a lucrative deal!