<?xml version="1.0" encoding="UTF-8"?>
<heldOrderRoutingPublicReport xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="605-xsd-v1.3.xsd">
  <version>1.3</version>
  <bd>Watermill Institutional Trading Llc</bd>
  <year>2026</year>
  <qtr>1</qtr>
  <timestamp>2026-04-14T05:00:22Z</timestamp>
  <rMonthly>
    <year>2026</year>
    <mon>1</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>
        <rVenue>
          <name>UNKNOWN</name>
          <orderPct>0.00</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>0.00</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0.0000</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0.0000</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0.0000</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0.0000</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>[Material aspects not specified for unidentified venue.]</materialAspects>
        </rVenue>
      </rVenues>
    </rOptions>
  </rMonthly>
  <rMonthly>
    <year>2026</year>
    <mon>2</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>
        <rVenue>
          <name>UNKNOWN</name>
          <orderPct>0.00</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>0.00</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0.0000</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0.0000</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0.0000</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0.0000</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>[Material aspects not specified for unidentified venue.]</materialAspects>
        </rVenue>
      </rVenues>
    </rOptions>
  </rMonthly>
  <rMonthly>
    <year>2026</year>
    <mon>3</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>
        <rVenue>
          <name>UNKNOWN</name>
          <orderPct>0.00</orderPct>
          <marketPct>0.00</marketPct>
          <marketableLimitPct>0.00</marketableLimitPct>
          <nonMarketableLimitPct>0.00</nonMarketableLimitPct>
          <otherPct>0.00</otherPct>
          <netPmtPaidRecvMarketOrdersUsd>0.0000</netPmtPaidRecvMarketOrdersUsd>
          <netPmtPaidRecvMarketOrdersCph>0.0000</netPmtPaidRecvMarketOrdersCph>
          <netPmtPaidRecvMarketableLimitOrdersUsd>0.0000</netPmtPaidRecvMarketableLimitOrdersUsd>
          <netPmtPaidRecvMarketableLimitOrdersCph>0.0000</netPmtPaidRecvMarketableLimitOrdersCph>
          <netPmtPaidRecvNonMarketableLimitOrdersUsd>0.0000</netPmtPaidRecvNonMarketableLimitOrdersUsd>
          <netPmtPaidRecvNonMarketableLimitOrdersCph>0.0000</netPmtPaidRecvNonMarketableLimitOrdersCph>
          <netPmtPaidRecvOtherOrdersUsd>0.0000</netPmtPaidRecvOtherOrdersUsd>
          <netPmtPaidRecvOtherOrdersCph>0.0000</netPmtPaidRecvOtherOrdersCph>
          <materialAspects>[Material aspects not specified for unidentified venue.]</materialAspects>
        </rVenue>
      </rVenues>
    </rOptions>
  </rMonthly>
</heldOrderRoutingPublicReport>
