﻿<?xml version="1.0" encoding="utf-8"?>
<heldOrderRoutingPublicReport>
  <version>1.1d</version>
  <bd>William Blair Sell Side</bd>
  <year>2024</year>
  <qtr>3</qtr>
  <timestamp>2024-10-06T13:17:28.877Z</timestamp>
  <rMonthly>
    <year>2024</year>
    <mon>07</mon>
    <rSP500>
      <ndoPct>100.00</ndoPct>
      <ndoMarketPct>93.99</ndoMarketPct>
      <ndoMarketableLimitPct>1.23</ndoMarketableLimitPct>
      <ndoNonmarketableLimitPct>3.21</ndoNonmarketableLimitPct>
      <ndoOtherPct>1.57</ndoOtherPct>
      <rVenues>
        <rVenue>
          <name>Virtu Americas LLC (NITE)</name>
          <orderPct>35.97</orderPct>
          <marketPct>36.32</marketPct>
          <marketableLimitPct>43.01</marketableLimitPct>
          <nonMarketableLimitPct>33.47</nonMarketableLimitPct>
          <otherPct>14.41</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0.0000</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Virtu Americas LLC (NITE) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Wall Street Access (VNDM)</name>
          <orderPct>35.32</orderPct>
          <marketPct>35.78</marketPct>
          <marketableLimitPct>26.88</marketableLimitPct>
          <nonMarketableLimitPct>37.60</nonMarketableLimitPct>
          <otherPct>9.32</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0.0000</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Wall Street Access (VNDM) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Citadel Securities LLC (CDRG)</name>
          <orderPct>27.74</orderPct>
          <marketPct>27.89</marketPct>
          <marketableLimitPct>30.11</marketableLimitPct>
          <nonMarketableLimitPct>28.93</nonMarketableLimitPct>
          <otherPct>14.41</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0.0000</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Citadel Securities LLC (CDRG) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Virtu Americas LLC (ITGI)</name>
          <orderPct>0.97</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>61.86</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0.0000</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>-16</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>-10.8485</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by ITGI are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable. ITGI may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
      </rVenues>
    </rSP500>
    <rOtherStocks>
      <ndoPct>100.00</ndoPct>
      <ndoMarketPct>91.96</ndoMarketPct>
      <ndoMarketableLimitPct>1.42</ndoMarketableLimitPct>
      <ndoNonmarketableLimitPct>4.55</ndoNonmarketableLimitPct>
      <ndoOtherPct>2.06</ndoOtherPct>
      <rVenues>
        <rVenue>
          <name>Wall Street Access (VNDM)</name>
          <orderPct>35.98</orderPct>
          <marketPct>36.55</marketPct>
          <marketableLimitPct>34.32</marketableLimitPct>
          <nonMarketableLimitPct>32.72</nonMarketableLimitPct>
          <otherPct>18.78</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0.0000</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Wall Street Access (VNDM) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Virtu Americas LLC (NITE)</name>
          <orderPct>35.56</orderPct>
          <marketPct>36.16</marketPct>
          <marketableLimitPct>36.09</marketableLimitPct>
          <nonMarketableLimitPct>33.09</nonMarketableLimitPct>
          <otherPct>13.88</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0.0000</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Virtu Americas LLC (NITE) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Citadel Securities LLC (CDRG)</name>
          <orderPct>27.44</orderPct>
          <marketPct>27.30</marketPct>
          <marketableLimitPct>27.81</marketableLimitPct>
          <nonMarketableLimitPct>34.20</nonMarketableLimitPct>
          <otherPct>18.78</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0.0000</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Citadel Securities LLC (CDRG) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Virtu Americas LLC (ITGI)</name>
          <orderPct>0.95</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>46.12</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0.0000</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>-26</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>-10.8485</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by ITGI are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable.  ITGI may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
        <rVenue>
          <name>BOFA Securities, Inc. (MLCO)</name>
          <orderPct>0.03</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>1.78</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>0.00</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0.0000</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>-26</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>-84.3328</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by MLCO are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable. MLCO may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
        <rVenue>
          <name>Clearpool Execution Services, LLC (CPEM)</name>
          <orderPct>0.03</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>1.22</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0.0000</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>-28</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>-40.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by CPEM are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable.  CPEM may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
        <rVenue>
          <name>NASDAQ Stock Exchange (XNAS)</name>
          <orderPct>0.02</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>0.82</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0.0000</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by XNAS are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable.  XNAS may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
        <rVenue>
          <name>NYSE ARCA (ARCX)</name>
          <orderPct>0.01</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>0.41</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by ARCX are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable.  ARCX may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
      </rVenues>
    </rOtherStocks>
    <rOptions>
      <ndoPct>100.00</ndoPct>
      <ndoMarketPct>69.55</ndoMarketPct>
      <ndoMarketableLimitPct>3.32</ndoMarketableLimitPct>
      <ndoNonmarketableLimitPct>17.47</ndoNonmarketableLimitPct>
      <ndoOtherPct>9.65</ndoOtherPct>
      <rVenues>
        <rVenue>
          <name>National Financial Services LLC (NFSC)</name>
          <orderPct>100.00</orderPct>
          <marketPct>100.00</marketPct>
          <marketableLimitPct>100.00</marketableLimitPct>
          <nonMarketableLimitPct>100.00</nonMarketableLimitPct>
          <otherPct>100.00</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from National Financial Services LLC (NFSC) for these trades</materialAspects>
        </rVenue>
      </rVenues>
    </rOptions>
	</rMonthly>
	<rMonthly>
    <year>2024</year>
    <mon>08</mon>
    <rSP500>
      <ndoPct>100.00</ndoPct>
      <ndoMarketPct>95.85</ndoMarketPct>
      <ndoMarketableLimitPct>0.90</ndoMarketableLimitPct>
      <ndoNonmarketableLimitPct>2.73</ndoNonmarketableLimitPct>
      <ndoOtherPct>0.52</ndoOtherPct>
      <rVenues>
        <rVenue>
          <name>Virtu Americas LLC (NITE)</name>
          <orderPct>33.35</orderPct>
          <marketPct>33.60</marketPct>
          <marketableLimitPct>32.61</marketableLimitPct>
          <nonMarketableLimitPct>29.86</nonMarketableLimitPct>
          <otherPct>7.55</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Virtu Americas LLC (NITE) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Citadel Securities LLC (CDRG)</name>
          <orderPct>33.22</orderPct>
          <marketPct>33.19</marketPct>
          <marketableLimitPct>39.13</marketableLimitPct>
          <nonMarketableLimitPct>37.77</nonMarketableLimitPct>
          <otherPct>5.66</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Citadel Securities LLC (CDRG) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Wall Street Access (VNDM)</name>
          <orderPct>33.00</orderPct>
          <marketPct>33.22</marketPct>
          <marketableLimitPct>28.26</marketableLimitPct>
          <nonMarketableLimitPct>32.37</nonMarketableLimitPct>
          <otherPct>3.77</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Wall Street Access (VNDM) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Virtu Americas LLC (ITGI)</name>
          <orderPct>0.43</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>83.02</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>-20</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>-11.9407</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by ITGI are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable.  ITGI may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
      </rVenues>
    </rSP500>
    <rOtherStocks>
      <ndoPct>100.00</ndoPct>
      <ndoMarketPct>92.24</ndoMarketPct>
      <ndoMarketableLimitPct>1.34</ndoMarketableLimitPct>
      <ndoNonmarketableLimitPct>5.11</ndoNonmarketableLimitPct>
      <ndoOtherPct>1.31</ndoOtherPct>
      <rVenues>
        <rVenue>
          <name>Citadel Securities LLC (CDRG)</name>
          <orderPct>33.34</orderPct>
          <marketPct>33.50</marketPct>
          <marketableLimitPct>36.02</marketableLimitPct>
          <nonMarketableLimitPct>35.32</nonMarketableLimitPct>
          <otherPct>11.65</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Citadel Securities LLC (CDRG) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Wall Street Access (VNDM)</name>
          <orderPct>32.89</orderPct>
          <marketPct>33.15</marketPct>
          <marketableLimitPct>34.12</marketableLimitPct>
          <nonMarketableLimitPct>33.96</nonMarketableLimitPct>
          <otherPct>8.74</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Wall Street Access (VNDM) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Virtu Americas LLC (NITE)</name>
          <orderPct>32.84</orderPct>
          <marketPct>33.35</marketPct>
          <marketableLimitPct>29.86</marketableLimitPct>
          <nonMarketableLimitPct>30.72</nonMarketableLimitPct>
          <otherPct>8.25</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Virtu Americas LLC (NITE) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Virtu Americas LLC (ITGI)</name>
          <orderPct>0.91</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>69.42</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>-94</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>-11.9407</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by ITGI are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable.  ITGI may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
        <rVenue>
          <name>Clearpool Execution Services, LLC (CPEM)</name>
          <orderPct>0.01</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>0.97</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>-54</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>-35.0980</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by CPEM are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable.  CPEM may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
        <rVenue>
          <name>NASDAQ Stock Exchange (XNAS)</name>
          <orderPct>0.01</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>0.49</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by XNAS are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable.  XNAS may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
        <rVenue>
          <name>New York Stock Exchange, Inc. (XNYS)</name>
          <orderPct>0.01</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>0.49</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by XNYS are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable.  XNYS may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
      </rVenues>
    </rOtherStocks>
    <rOptions>
      <ndoPct>100.00</ndoPct>
      <ndoMarketPct>60.82</ndoMarketPct>
      <ndoMarketableLimitPct>5.98</ndoMarketableLimitPct>
      <ndoNonmarketableLimitPct>23.27</ndoNonmarketableLimitPct>
      <ndoOtherPct>9.94</ndoOtherPct>
      <rVenues>
        <rVenue>
          <name>National Financial Services LLC (NFSC)</name>
          <orderPct>100.00</orderPct>
          <marketPct>100.00</marketPct>
          <marketableLimitPct>100.00</marketableLimitPct>
          <nonMarketableLimitPct>100.00</nonMarketableLimitPct>
          <otherPct>100.00</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from National Financial Services LLC (NFSC) for these trades</materialAspects>
        </rVenue>
      </rVenues>
    </rOptions>
	</rMonthly>
	<rMonthly>
    <year>2024</year>
    <mon>09</mon>
    <rSP500>
      <ndoPct>100.00</ndoPct>
      <ndoMarketPct>91.97</ndoMarketPct>
      <ndoMarketableLimitPct>1.83</ndoMarketableLimitPct>
      <ndoNonmarketableLimitPct>4.76</ndoNonmarketableLimitPct>
      <ndoOtherPct>1.44</ndoOtherPct>
      <rVenues>
        <rVenue>
          <name>Citadel Securities LLC (CDRG)</name>
          <orderPct>33.32</orderPct>
          <marketPct>33.44</marketPct>
          <marketableLimitPct>35.29</marketableLimitPct>
          <nonMarketableLimitPct>35.85</nonMarketableLimitPct>
          <otherPct>15.00</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Citadel Securities LLC (CDRG) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Wall Street Access (VNDM)</name>
          <orderPct>33.32</orderPct>
          <marketPct>33.52</marketPct>
          <marketableLimitPct>32.35</marketableLimitPct>
          <nonMarketableLimitPct>33.58</nonMarketableLimitPct>
          <otherPct>21.25</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Wall Street Access (VNDM) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Virtu Americas LLC (NITE)</name>
          <orderPct>32.78</orderPct>
          <marketPct>33.05</marketPct>
          <marketableLimitPct>32.35</marketableLimitPct>
          <nonMarketableLimitPct>30.57</nonMarketableLimitPct>
          <otherPct>23.75</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Virtu Americas LLC (NITE) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Virtu Americas LLC (ITGI)</name>
          <orderPct>0.56</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>38.75</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>-17</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>-11.9407</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by ITGI are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable.  ITGI may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
        <rVenue>
          <name>Clearpool Execution Services, LLC (CPEM)</name>
          <orderPct>0.02</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>1.25</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by CPEM are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable.  CPEM may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
      </rVenues>
    </rSP500>
    <rOtherStocks>
      <ndoPct>100.00</ndoPct>
      <ndoMarketPct>89.50</ndoMarketPct>
      <ndoMarketableLimitPct>2.25</ndoMarketableLimitPct>
      <ndoNonmarketableLimitPct>7.07</ndoNonmarketableLimitPct>
      <ndoOtherPct>1.18</ndoOtherPct>
      <rVenues>
        <rVenue>
          <name>Citadel Securities LLC (CDRG)</name>
          <orderPct>33.88</orderPct>
          <marketPct>33.29</marketPct>
          <marketableLimitPct>35.03</marketableLimitPct>
          <nonMarketableLimitPct>40.54</nonMarketableLimitPct>
          <otherPct>36.56</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Citadel Securities LLC (CDRG) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Virtu Americas LLC (NITE)</name>
          <orderPct>33.27</orderPct>
          <marketPct>33.48</marketPct>
          <marketableLimitPct>32.77</marketableLimitPct>
          <nonMarketableLimitPct>30.99</nonMarketableLimitPct>
          <otherPct>32.26</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Virtu Americas LLC (NITE) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Wall Street Access (VNDM)</name>
          <orderPct>32.75</orderPct>
          <marketPct>33.23</marketPct>
          <marketableLimitPct>32.20</marketableLimitPct>
          <nonMarketableLimitPct>28.47</nonMarketableLimitPct>
          <otherPct>22.58</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from Wall Street Access (VNDM) for these trades</materialAspects>
        </rVenue>
        <rVenue>
          <name>Virtu Americas LLC (ITGI)</name>
          <orderPct>0.05</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>4.30</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>-1</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>-11.9407</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by ITGI are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable.  ITGI may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
        <rVenue>
          <name>Clearpool Execution Services, LLC (CPEM)</name>
          <orderPct>0.04</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>3.23</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>-17</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>-35.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by CPEM are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable.  CPEM may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
        <rVenue>
          <name>New York Stock Exchange, Inc. (XNYS)</name>
          <orderPct>0.01</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>1.08</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair may be charged fees for orders executed in Alternative Trading Systems.  Orders routed further by XNYS are sent to exchanges which incur fees and rebates based on the exchange rules, as approved by the SEC, and are non-negotiable.  XNYS may pass to William Blair any execution fees and rebates incurred for routing the orders with an additional routing fee</materialAspects>
        </rVenue>
      </rVenues>
    </rOtherStocks>
    <rOptions>
      <ndoPct>100.00</ndoPct>
      <ndoMarketPct>59.02</ndoMarketPct>
      <ndoMarketableLimitPct>4.99</ndoMarketableLimitPct>
      <ndoNonmarketableLimitPct>25.64</ndoNonmarketableLimitPct>
      <ndoOtherPct>10.35</ndoOtherPct>
      <rVenues>
        <rVenue>
          <name>National Financial Services LLC (NFSC)</name>
          <orderPct>100.00</orderPct>
          <marketPct>100.00</marketPct>
          <marketableLimitPct>100.00</marketableLimitPct>
          <nonMarketableLimitPct>100.00</nonMarketableLimitPct>
          <otherPct>100.00</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>William Blair did not receive payment for order flow from National Financial Services LLC (NFSC) for these trades</materialAspects>
        </rVenue>
      </rVenues>
    </rOptions>
  </rMonthly>
</heldOrderRoutingPublicReport>