U.S. spot bitcoin exchange-traded funds (ETFs) appear to be on the verge of launching after the exchanges that will list them filed amended documents, suggesting they expect U.S. Securities and Exchange Commission approval in the coming days.

The amended 19b-4 filings, filed on behalf of BlackRock, Grayscale, Fidelity and other issuers, join last month's amended S-1 filings, addressing feedback from the U.S. Securities and Exchange Commission (SEC). More than a dozen applicants hope to launch the first spot bitcoin ETFs in the U.S.; it's likely multiple issuers will be approved simultaneously.