The Security Traders Association (“STA”) welcomes the opportunity to comment on proposed rule changes (“ATS Filing”) to: (i) FINRA Rule 4522 to require each alternative trading system (“ATS”) to report to FINRA weekly volume information and number of trades regarding securities 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 publically available on its website.

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