Online report, Cboe BZX Exchange Inc. A series of new documents have been filed by issuers competing for spot Solana ETF. The exchange released 19b-4 filings from Canary Solana Trust, Bitwise Solana ETF, 21Shares Core Solana ETF and VanEck Solana Trust on Tuesday. The 19b-4 document is a document filed by the exchange on behalf of the issuer. Once filed, it is confirmed by the U.S. Securities and Exchange Commission (SEC) and published in the Federal Register, and the agency's approval process begins. The applications were all rejected last year, with one potential issuer, who declined to be named, saying that "all applications were withdrawn at the request of the SEC."