<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<heldOrderRoutingPublicReport>
    <version>1.2</version>
    <bd>SANTANDER INVESTMENT SERVICES</bd>
    <year>2021</year>
    <qtr>04</qtr>
    <timestamp>2022-01-05T16:32:22Z</timestamp>
    <rMonthly>
        <year>2021</year>
        <mon>10</mon>
        <rSP500>
            <ndoPct>0.00</ndoPct>
            <ndoMarketPct>0.00</ndoMarketPct>
            <ndoMarketableLimitPct>0.00</ndoMarketableLimitPct>
            <ndoNonmarketableLimitPct>0.00</ndoNonmarketableLimitPct>
            <ndoOtherPct>0.00</ndoOtherPct>
            <rVenues/>
        </rSP500>
        <rOtherStocks>
            <ndoPct>0.00</ndoPct>
            <ndoMarketPct>0.00</ndoMarketPct>
            <ndoMarketableLimitPct>0.00</ndoMarketableLimitPct>
            <ndoNonmarketableLimitPct>0.00</ndoNonmarketableLimitPct>
            <ndoOtherPct>0.00</ndoOtherPct>
            <rVenues/>
        </rOtherStocks>
        <rOptions>
            <ndoPct>0.00</ndoPct>
            <ndoMarketPct>0.00</ndoMarketPct>
            <ndoMarketableLimitPct>0.00</ndoMarketableLimitPct>
            <ndoNonmarketableLimitPct>0.00</ndoNonmarketableLimitPct>
            <ndoOtherPct>0.00</ndoOtherPct>
            <rVenues/>
        </rOptions>
    </rMonthly>
    <rMonthly>
        <year>2021</year>
        <mon>11</mon>
        <rSP500>
            <ndoPct>0.00</ndoPct>
            <ndoMarketPct>0.00</ndoMarketPct>
            <ndoMarketableLimitPct>0.00</ndoMarketableLimitPct>
            <ndoNonmarketableLimitPct>0.00</ndoNonmarketableLimitPct>
            <ndoOtherPct>0.00</ndoOtherPct>
            <rVenues/>
        </rSP500>
        <rOtherStocks>
            <ndoPct>100.00</ndoPct>
            <ndoMarketPct>100.00</ndoMarketPct>
            <ndoMarketableLimitPct>0.00</ndoMarketableLimitPct>
            <ndoNonmarketableLimitPct>0.00</ndoNonmarketableLimitPct>
            <ndoOtherPct>0.00</ndoOtherPct>
            <rVenues>
                <rVenue>
                    <name>Citadel Securities LLC</name>
                    <mic>CDRG</mic>
                    <orderPct>46.15</orderPct>
                    <marketPct>46.15</marketPct>
                    <marketableLimitPct>0.00</marketableLimitPct>
                    <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
                    <otherPct>0.00</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>[Insert discussion of the material aspects of the relationship with this venue pursuant to rule 606(a)(1)(iv).]</materialAspects>
                </rVenue>
                <rVenue>
                    <name>VIRTU Americas, LLC</name>
                    <mic>NITE</mic>
                    <orderPct>30.77</orderPct>
                    <marketPct>30.77</marketPct>
                    <marketableLimitPct>0.00</marketableLimitPct>
                    <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
                    <otherPct>0.00</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>[Insert discussion of the material aspects of the relationship with this venue pursuant to rule 606(a)(1)(iv).]</materialAspects>
                </rVenue>
                <rVenue>
                    <name>JANE STREET CAPITAL, LLC</name>
                    <mic>JNST</mic>
                    <orderPct>15.38</orderPct>
                    <marketPct>15.38</marketPct>
                    <marketableLimitPct>0.00</marketableLimitPct>
                    <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
                    <otherPct>0.00</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>[Insert discussion of the material aspects of the relationship with this venue pursuant to rule 606(a)(1)(iv).]</materialAspects>
                </rVenue>
                <rVenue>
                    <name>UBS Securities, LLC</name>
                    <mic>UBSS</mic>
                    <orderPct>7.69</orderPct>
                    <marketPct>7.69</marketPct>
                    <marketableLimitPct>0.00</marketableLimitPct>
                    <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
                    <otherPct>0.00</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>[Insert discussion of the material aspects of the relationship with this venue pursuant to rule 606(a)(1)(iv).]</materialAspects>
                </rVenue>
            </rVenues>
        </rOtherStocks>
        <rOptions>
            <ndoPct>0.00</ndoPct>
            <ndoMarketPct>0.00</ndoMarketPct>
            <ndoMarketableLimitPct>0.00</ndoMarketableLimitPct>
            <ndoNonmarketableLimitPct>0.00</ndoNonmarketableLimitPct>
            <ndoOtherPct>0.00</ndoOtherPct>
            <rVenues/>
        </rOptions>
    </rMonthly>
    <rMonthly>
        <year>2021</year>
        <mon>12</mon>
        <rSP500>
            <ndoPct>100.00</ndoPct>
            <ndoMarketPct>100.00</ndoMarketPct>
            <ndoMarketableLimitPct>0.00</ndoMarketableLimitPct>
            <ndoNonmarketableLimitPct>0.00</ndoNonmarketableLimitPct>
            <ndoOtherPct>0.00</ndoOtherPct>
            <rVenues>
                <rVenue>
                    <name>Citadel Securities LLC</name>
                    <mic>CDRG</mic>
                    <orderPct>100.00</orderPct>
                    <marketPct>100.00</marketPct>
                    <marketableLimitPct>0.00</marketableLimitPct>
                    <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
                    <otherPct>0.00</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>[Insert discussion of the material aspects of the relationship with this venue pursuant to rule 606(a)(1)(iv).]</materialAspects>
                </rVenue>
            </rVenues>
        </rSP500>
        <rOtherStocks>
            <ndoPct>100.00</ndoPct>
            <ndoMarketPct>100.00</ndoMarketPct>
            <ndoMarketableLimitPct>0.00</ndoMarketableLimitPct>
            <ndoNonmarketableLimitPct>0.00</ndoNonmarketableLimitPct>
            <ndoOtherPct>0.00</ndoOtherPct>
            <rVenues>
                <rVenue>
                    <name>Citadel Securities LLC</name>
                    <mic>CDRG</mic>
                    <orderPct>47.47</orderPct>
                    <marketPct>47.47</marketPct>
                    <marketableLimitPct>0.00</marketableLimitPct>
                    <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
                    <otherPct>0.00</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>[Insert discussion of the material aspects of the relationship with this venue pursuant to rule 606(a)(1)(iv).]</materialAspects>
                </rVenue>
                <rVenue>
                    <name>VIRTU Americas, LLC</name>
                    <mic>NITE</mic>
                    <orderPct>24.24</orderPct>
                    <marketPct>24.24</marketPct>
                    <marketableLimitPct>0.00</marketableLimitPct>
                    <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
                    <otherPct>0.00</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>[Insert discussion of the material aspects of the relationship with this venue pursuant to rule 606(a)(1)(iv).]</materialAspects>
                </rVenue>
                <rVenue>
                    <name>JANE STREET CAPITAL, LLC</name>
                    <mic>JNST</mic>
                    <orderPct>22.22</orderPct>
                    <marketPct>22.22</marketPct>
                    <marketableLimitPct>0.00</marketableLimitPct>
                    <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
                    <otherPct>0.00</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>[Insert discussion of the material aspects of the relationship with this venue pursuant to rule 606(a)(1)(iv).]</materialAspects>
                </rVenue>
                <rVenue>
                    <name>G1 Execution Services, LLC</name>
                    <mic>ETMM</mic>
                    <orderPct>3.03</orderPct>
                    <marketPct>3.03</marketPct>
                    <marketableLimitPct>0.00</marketableLimitPct>
                    <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
                    <otherPct>0.00</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>[Insert discussion of the material aspects of the relationship with this venue pursuant to rule 606(a)(1)(iv).]</materialAspects>
                </rVenue>
                <rVenue>
                    <name>Two Sigma Securities, LLC</name>
                    <mic>SOHO</mic>
                    <orderPct>2.02</orderPct>
                    <marketPct>2.02</marketPct>
                    <marketableLimitPct>0.00</marketableLimitPct>
                    <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
                    <otherPct>0.00</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>[Insert discussion of the material aspects of the relationship with this venue pursuant to rule 606(a)(1)(iv).]</materialAspects>
                </rVenue>
                <rVenue>
                    <name>UBS Securities, LLC</name>
                    <mic>UBSS</mic>
                    <orderPct>1.01</orderPct>
                    <marketPct>1.01</marketPct>
                    <marketableLimitPct>0.00</marketableLimitPct>
                    <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
                    <otherPct>0.00</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>[Insert discussion of the material aspects of the relationship with this venue pursuant to rule 606(a)(1)(iv).]</materialAspects>
                </rVenue>
            </rVenues>
        </rOtherStocks>
        <rOptions>
            <ndoPct>0.00</ndoPct>
            <ndoMarketPct>0.00</ndoMarketPct>
            <ndoMarketableLimitPct>0.00</ndoMarketableLimitPct>
            <ndoNonmarketableLimitPct>0.00</ndoNonmarketableLimitPct>
            <ndoOtherPct>0.00</ndoOtherPct>
            <rVenues/>
        </rOptions>
    </rMonthly>
</heldOrderRoutingPublicReport>
