diff --git a/EventFiltering/CMakeLists.txt b/EventFiltering/CMakeLists.txt
index 4f5ab9ed153..31cd58f40ed 100644
--- a/EventFiltering/CMakeLists.txt
+++ b/EventFiltering/CMakeLists.txt
@@ -108,10 +108,10 @@ o2physics_add_dpl_workflow(lf-f1proton-filter
     COMPONENT_NAME Analysis)
 
 o2physics_add_library(EventFilteringUtils
-    SOURCES Zorro.cxx
-    INSTALL_HEADERS ZorroHelper.h
+    SOURCES Zorro.cxx ZorroSummary.cxx
+    INSTALL_HEADERS ZorroHelper.h ZorroSummary.h
     PUBLIC_LINK_LIBRARIES O2::Framework O2Physics::AnalysisCore Arrow::arrow_shared)
 
 o2physics_target_root_dictionary(EventFilteringUtils
-   HEADERS ZorroHelper.h
+   HEADERS ZorroHelper.h ZorroSummary.h
    LINKDEF EventFilteringUtilsLinkDef.h)
\ No newline at end of file
diff --git a/EventFiltering/EventFilteringUtilsLinkDef.h b/EventFiltering/EventFilteringUtilsLinkDef.h
index 61def8978aa..3f029b8aa9a 100644
--- a/EventFiltering/EventFilteringUtilsLinkDef.h
+++ b/EventFiltering/EventFilteringUtilsLinkDef.h
@@ -14,4 +14,5 @@
 #pragma link off all functions;
 
 #pragma link C++ class ZorroHelper + ;
+#pragma link C++ class ZorroSummary + ;
 #pragma link C++ class std::vector < ZorroHelper> + ;
diff --git a/EventFiltering/Zorro.cxx b/EventFiltering/Zorro.cxx
index a5c2a51133a..027861009d3 100644
--- a/EventFiltering/Zorro.cxx
+++ b/EventFiltering/Zorro.cxx
@@ -135,6 +135,13 @@ std::vector<int> Zorro::initCCDB(o2::ccdb::BasicCCDBManager* ccdb, int runNumber
   for (size_t i{0}; i < mTOIs.size(); ++i) {
     LOGF(info, ">>> %s : %i", mTOIs[i].data(), mTOIidx[i]);
   }
+  mZorroSummary.setupTOIs(mTOIs.size(), tois);
+  std::vector<double> toiCounters(mTOIs.size(), 0.);
+  for (size_t i{0}; i < mTOIs.size(); ++i) {
+    toiCounters[i] = mSelections->GetBinContent(mTOIidx[i] + 2);
+  }
+  mZorroSummary.setupRun(runNumber, mInspectedTVX->GetBinContent(1), toiCounters);
+
   return mTOIidx;
 }
 
@@ -174,6 +181,7 @@ bool Zorro::isSelected(uint64_t bcGlobalId, uint64_t tolerance)
 {
   uint64_t lastSelectedIdx = mLastSelectedIdx;
   fetch(bcGlobalId, tolerance);
+  bool retVal{false};
   for (size_t i{0}; i < mTOIidx.size(); ++i) {
     if (mTOIidx[i] < 0) {
       continue;
@@ -181,11 +189,12 @@ bool Zorro::isSelected(uint64_t bcGlobalId, uint64_t tolerance)
       mTOIcounts[i] += (lastSelectedIdx != mLastSelectedIdx); /// Avoid double counting
       if (mAnalysedTriggersOfInterest && lastSelectedIdx != mLastSelectedIdx) {
         mAnalysedTriggersOfInterest->Fill(i);
+        mZorroSummary.increaseTOIcounter(mRunNumber, i);
       }
-      return true;
+      retVal = true;
     }
   }
-  return false;
+  return retVal;
 }
 
 std::vector<bool> Zorro::getTriggerOfInterestResults(uint64_t bcGlobalId, uint64_t tolerance)
diff --git a/EventFiltering/Zorro.h b/EventFiltering/Zorro.h
index 2e5012da64f..5043eec232c 100644
--- a/EventFiltering/Zorro.h
+++ b/EventFiltering/Zorro.h
@@ -23,6 +23,7 @@
 #include "CommonDataFormat/IRFrame.h"
 #include "Framework/HistogramRegistry.h"
 #include "ZorroHelper.h"
+#include "ZorroSummary.h"
 
 namespace o2
 {
@@ -55,7 +56,11 @@ class Zorro
   void setBaseCCDBPath(std::string path) { mBaseCCDBPath = path; }
   void setBCtolerance(int tolerance) { mBCtolerance = tolerance; }
 
+  ZorroSummary* getZorroSummary() { return &mZorroSummary; }
+
  private:
+  ZorroSummary mZorroSummary{"ZorroSummary", "ZorroSummary"};
+
   std::string mBaseCCDBPath = "Users/m/mpuccio/EventFiltering/OTS/";
   int mRunNumber = 0;
   TH1* mAnalysedTriggers;           /// Accounting for all triggers in the current run
diff --git a/EventFiltering/ZorroSummary.cxx b/EventFiltering/ZorroSummary.cxx
new file mode 100644
index 00000000000..ee241f49108
--- /dev/null
+++ b/EventFiltering/ZorroSummary.cxx
@@ -0,0 +1,69 @@
+// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
+// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
+// All rights not expressly granted are reserved.
+//
+// This software is distributed under the terms of the GNU General Public
+// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
+//
+// In applying this license CERN does not waive the privileges and immunities
+// granted to it by virtue of its status as an Intergovernmental Organization
+// or submit itself to any jurisdiction.
+
+#include "ZorroSummary.h"
+
+#include "TCollection.h"
+
+void ZorroSummary::Copy(TObject& c) const
+{
+  static_cast<ZorroSummary&>(c) = *this;
+}
+
+Long64_t ZorroSummary::Merge(TCollection* list)
+{
+  if (!list) {
+    return 0;
+  }
+  int n = 1;
+  if (list->IsEmpty()) {
+    return n;
+  }
+
+  for (auto* obj : *list) {
+    auto* entry = dynamic_cast<ZorroSummary*>(obj);
+    if (!entry || entry->getTOInames() != mTOInames) {
+      continue;
+    }
+    n++;
+    auto& analysedToiCounters = entry->getAnalysedTOIcounters();
+    for (const auto& [runNumber, currentAnalysedToiCounters] : analysedToiCounters) {
+      if (mAnalysedTOIcounters.find(runNumber) == mAnalysedTOIcounters.end()) {
+        mAnalysedTOIcounters[runNumber] = currentAnalysedToiCounters;
+        mTVXcounters[runNumber] = entry->getTVXcounters().at(runNumber);
+        mTOIcounters[runNumber] = entry->getTOIcounters().at(runNumber);
+      } else {
+        auto& thisCounters = mAnalysedTOIcounters[runNumber];
+        for (size_t i = 0; i < thisCounters.size(); ++i) {
+          thisCounters[i] += currentAnalysedToiCounters[i];
+        }
+      }
+    }
+  }
+  return n;
+}
+
+double ZorroSummary::getNormalisationFactor(int toiId) const
+{
+  double totalTOI{0.}, totalTVX{0.};
+  ULong64_t totalAnalysedTOI{0};
+  for (const auto& [runNumber, toiCounters] : mTOIcounters) {
+    totalTOI += toiCounters.at(toiId);
+  }
+  for (const auto& [runNumber, tvxCounters] : mTVXcounters) {
+    totalTVX += tvxCounters;
+  }
+  for (const auto& [runNumber, analysedTOIcounters] : mAnalysedTOIcounters) {
+    totalAnalysedTOI += analysedTOIcounters.at(toiId);
+  }
+
+  return totalTVX * totalAnalysedTOI / totalTOI;
+}
\ No newline at end of file
diff --git a/EventFiltering/ZorroSummary.h b/EventFiltering/ZorroSummary.h
new file mode 100644
index 00000000000..b4d401adba4
--- /dev/null
+++ b/EventFiltering/ZorroSummary.h
@@ -0,0 +1,76 @@
+// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
+// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
+// All rights not expressly granted are reserved.
+//
+// This software is distributed under the terms of the GNU General Public
+// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
+//
+// In applying this license CERN does not waive the privileges and immunities
+// granted to it by virtue of its status as an Intergovernmental Organization
+// or submit itself to any jurisdiction.
+//
+
+#ifndef EVENTFILTERING_ZORROSUMMARY_H_
+#define EVENTFILTERING_ZORROSUMMARY_H_
+
+#include <TNamed.h>
+
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+class ZorroSummary : public TNamed
+{
+ public:
+  ZorroSummary() = default;
+  ZorroSummary(const char* name, const char* objTitle) : TNamed(name, objTitle) {}
+  virtual ~ZorroSummary() = default;   // NOLINT: Making this override breaks compilation for unknown reason
+  virtual void Copy(TObject& c) const; // NOLINT: Making this override breaks compilation for unknown reason
+  virtual Long64_t Merge(TCollection* list);
+
+  void setupTOIs(int ntois, const std::string& toinames)
+  {
+    mNtois = ntois;
+    mTOInames = toinames;
+  }
+  void setupRun(int runNumber, double tvxCountes, const std::vector<double>& toiCounters)
+  {
+    if (mRunNumber == runNumber) {
+      return;
+    }
+    mRunNumber = runNumber;
+    mTVXcounters[runNumber] = tvxCountes;
+    mTOIcounters[runNumber] = toiCounters;
+    if (mAnalysedTOIcounters.find(runNumber) == mAnalysedTOIcounters.end()) {
+      mAnalysedTOIcounters[runNumber] = std::vector<ULong64_t>(mNtois, 0ull);
+    }
+    mCurrentAnalysedTOIcounters = &mAnalysedTOIcounters[runNumber];
+  }
+  double getNormalisationFactor(int toiId) const;
+  void increaseTOIcounter(int runNumber, int toiId)
+  {
+    if (runNumber != mRunNumber) {
+      return;
+    }
+    mCurrentAnalysedTOIcounters->at(toiId)++;
+  }
+
+  std::string getTOInames() const { return mTOInames; }
+  const auto& getTOIcounters() const { return mTOIcounters; }
+  const auto& getTVXcounters() const { return mTVXcounters; }
+  const auto& getAnalysedTOIcounters() const { return mAnalysedTOIcounters; }
+
+ private:
+  int mRunNumber = 0;                                            //! Run currently being analysed
+  std::vector<ULong64_t>* mCurrentAnalysedTOIcounters = nullptr; //! Analysed TOI counters for the current run
+
+  int mNtois = 0;
+  std::string mTOInames;
+  std::unordered_map<int, std::vector<ULong64_t>> mAnalysedTOIcounters;
+  std::unordered_map<int, std::vector<double>> mTOIcounters;
+  std::unordered_map<int, double> mTVXcounters;
+
+  ClassDef(ZorroSummary, 1);
+};
+
+#endif // EVENTFILTERING_ZORROSUMMARY_H_
\ No newline at end of file
diff --git a/PWGLF/TableProducer/Nuspex/nucleiSpectra.cxx b/PWGLF/TableProducer/Nuspex/nucleiSpectra.cxx
index 9dae9bf2e1c..1e8fdfd22cd 100644
--- a/PWGLF/TableProducer/Nuspex/nucleiSpectra.cxx
+++ b/PWGLF/TableProducer/Nuspex/nucleiSpectra.cxx
@@ -45,6 +45,7 @@
 #include "DetectorsBase/Propagator.h"
 
 #include "EventFiltering/Zorro.h"
+#include "EventFiltering/ZorroSummary.h"
 
 #include "Framework/AnalysisDataModel.h"
 #include "Framework/AnalysisTask.h"
@@ -232,6 +233,7 @@ struct nucleiSpectra {
   Produces<o2::aod::NucleiTableFlow> nucleiTableFlow;
   Service<o2::ccdb::BasicCCDBManager> ccdb;
   Zorro zorro;
+  OutputObj<ZorroSummary> zorroSummary{"zorroSummary"};
   TrackTuner trackTunerObj;
 
   Configurable<bool> cfgCompensatePIDinTracking{"cfgCompensatePIDinTracking", false, "If true, divide tpcInnerParam by the electric charge"};
@@ -370,6 +372,7 @@ struct nucleiSpectra {
 
   void init(o2::framework::InitContext&)
   {
+    zorroSummary.setObject(zorro.getZorroSummary());
     ccdb->setURL(cfgCCDBurl);
     ccdb->setCaching(true);
     ccdb->setLocalObjectValidityChecking();