<?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>0000310607-20-000019</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 Form ATS-N for Instinet BlockCross (1) modifies the means of entering orders to the BlockCross ATS by removing direct FIX connectivity that bypasses the Front End System (Part III Item 5 and Part III Item 11) and (2) reduces the minimum order quantity eligible for matching in BlockCross from 5,000 shares to 2,500 shares (Part III Item 7, Part III Item 8, and Part III Item 9). These changes apply to all Subscribers and the Broker-Dealer Operator.</cov:taStatementAboutAmendment>
  <cov:liveTestFlag>LIVE</cov:liveTestFlag>
  <cov:flags>
    <cov:overrideInternetFlag>false</cov:overrideInternetFlag>
    <cov:confirmingCopyFlag>false</cov:confirmingCopyFlag>
  </cov:flags>
</cov:edgarSubmission>