According to BlockBeats, The Block quoted sources as saying that the US SEC rejected two Solana spot ETF 19b-4 applications submitted by Cboe BZX. As a result, these applications have been withdrawn from the Cboe website.
The 19b-4 filing is filed by a trading platform (in this case, Cboe) on behalf of the issuer. If published in the Federal Register, it kicks off the SEC’s approval process. Another important form is the S-1 registration statement, which is filed by the issuer and does not have any deadline. However, because the SEC rejects the 19b-4 forms, these forms are never published in the Federal Register and therefore do not kick off the potential approval or rejection process.

As previously reported, at 8:00 a.m. on August 20, before Cboe BZX deleted the Solana ETF-related 19b-4 form from its website, the U.S. SEC had held talks with potential Solana ETF issuers and expressed concerns about Solana's potential status as a security.