The U.S. Securities and Exchange Commission (SEC) is issuing this sources sought notice as a means of conducting market research to determine the availability and technical capability of large and small businesses to provide blockchain data to support the SEC's efforts to monitor risk, improve compliance, and inform Commission policy with respect to digital assets. The SEC is seeking information for potential sources to support the goal of acquiring data for the most widely used blockchain ledgers, including the universe of available information and transaction details.