Proposed Rule to Require Alternative Trading Systems to Report Volume Information to FINRA and Use Unique Market Participant Identifiers

Financial Industry Regulatory Authority, Inc. (“FINRA”) is filing with the Securities and Exchange Commission (“SEC” or “Commission”) a proposed rule change to (i) adopt FINRA Rule 4552 to require each alternative trading system (“ATS”) to report to FINRA weekly volume information and number of trades regarding securities transactions within the ATS; and (ii) amend FINRA Rules 6160, 6170, 6480, and 6720 to require each ATS to acquire and use a single, unique market participant identifier (“MPID”) when reporting information to FINRA. FINRA will make the reported volume and trade count information for equity securities publicly available on its web site.