CoinWorld News reports that 21Shares has submitted an S-1 filing to the U.S. Securities and Exchange Commission (U.S. SEC) to launch the 21Shares Sei ETF, which aims to track the price of SEI tokens. This ETF will not use leverage or derivatives, and SEI will be custodied by Coinbase Custody. Shares are expected to be listed on exchanges, and authorized participants can subscribe and redeem using cash or physical assets.