The REX-Osprey ESK ETF, which offers exposure to Ethereum (ETH) along with staking rewards, was launched today, September 25, 2025, and is now available for trading in the United States under the regulated structure of the Investment Company Act of 1940. All staking rewards are distributed directly to investors without retention by REX or Osprey. This is the first ETF of its kind in the U.S., following the previous launch of its Solana (SSK) ETF. Multiple sources confirm the start of operations today.