A screenshot of the document posted by analyst James Seyffart on the
The document description shows: Proposed rule changes for the listing and trading of iShares Ethereum Trust shares pursuant to Nasdaq Rule 5711(d) (Commodity-Based Trust Shares).
According to the document, the proposed Ethereum ETF will use Coinbase Custody Trust Company as the custodian and will use the CME CF Ethereum USD reference rate.
James Seyffart said that according to public information, there are currently 5 spot Ethereum ETF filings: Vaneck, ARKInvest/21Shares, Hashdex, Invesco US/Galaxy, and Grayscale submitted documents to convert ETHE (in no particular order).