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<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>0000310607-19-000019</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>This Material Amendment to Part III, Items 2 and 22 introduces the capability of certain Subscribers who are participants on the Paxos Settlement Service ("PSS") platform operated by Paxos Trust Company, LLC to settle transactions via the PSS and clarifies that the manner in which a Subscriber clears and settles transactions does not affect eligibility for ATS services. The amendment applies only to Subscribers that are Paxos participants and the Broker-Dealer Operator. The amendment will not affect Subscribers' (who are not Paxos participants) default clearance and settlement instructions.</cov:taStatementAboutAmendment>
  <cov:liveTestFlag>LIVE</cov:liveTestFlag>
  <cov:flags>
    <cov:overrideInternetFlag>false</cov:overrideInternetFlag>
    <cov:confirmingCopyFlag>false</cov:confirmingCopyFlag>
  </cov:flags>
</cov:edgarSubmission>