<?xml version="1.0" encoding="UTF-8"?>
<cov:edgarSubmission xmlns:cov="http://www.sec.gov/edgar/atsn/cover" xmlns:ats="http://www.sec.gov/edgar/atsncommon">
  <cov:submissionType>ATS-N/MA</cov:submissionType>
  <cov:rbOperatesPursuantToFormATS>N</cov:rbOperatesPursuantToFormATS>
  <cov:accessionNumber>0000902664-23-003172</cov:accessionNumber>
  <cov:filerCredentials>
    <cov:filerCik>0000310607</cov:filerCik>
    <cov:filerCcc>XXXXXXXX</cov:filerCcc>
  </cov:filerCredentials>
  <cov:fileNumber>013-00108</cov:fileNumber>
  <cov:txNMSStockATSName>Instinet BlockCross</cov:txNMSStockATSName>
  <cov:taStatementAboutAmendment>Part III Item 11(c) is amended to change the execution price of orders submitted in AutoEx mode to the midpoint of the NBBO at the time that orders are automatically executed. The changes herein apply to the Broker Dealer Operator and all Subscribers.</cov:taStatementAboutAmendment>
  <cov:liveTestFlag>LIVE</cov:liveTestFlag>
  <cov:flags>
    <cov:overrideInternetFlag>false</cov:overrideInternetFlag>
    <cov:confirmingCopyFlag>false</cov:confirmingCopyFlag>
  </cov:flags>
</cov:edgarSubmission>
