Six companies revised their S-1 registration statements for spot Ethereum ETFs on May 31, notably excluding Ark Invest from the filings, a change reflected in the renaming of the "Ark 21Shares Ethereum ETF" to the "21Shares Core Ethereum ETF." The updated filings no longer mention Ark Invest as the fund's subadvisor, unlike earlier submissions.

Ark Invest has not provided any comments regarding this modification.

Other amendments included Bitwise, Fidelity, Invesco Galaxy, VanEck, and Franklin Templeton. Franklin Templeton's amendment introduced a 0.19% sponsor fee, marking it as the first issuer to specify a percentage-based sponsor fee.

Bloomberg ETF analyst Eric Balchunas observed that there was no fee competition among applicants comparable to the reduced fees and temporary discounts seen before the launch of spot Bitcoin ETFs.

The amended filings confirm that companies involved in each fund will not participate in staking activities initially. They also originally prohibit in-kind creations and redemptions but leave open the possibility of such transactions pending future regulatory approval.

Some filings now include details on initial seed sale proceeds and introduce ticker symbols for the first time.

Following the SEC's approval of 19-b4 filings on May 23, the launch of spot Ethereum ETFs is anticipated by the end of June, with experts suggesting a possible debut by July 4.

BlackRock and Grayscale were among the companies that submitted amendments to their S-1 and S-3 statements, respectively, adding specifics such as seed purchase amounts and partners. With all prospective issuers meeting the SEC's deadline, the regulator will review the applications, potentially requiring further adjustments before final approval and launch.