diff --git a/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4EDM4hep2LcioConv.ipp b/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4EDM4hep2LcioConv.ipp
index 7ec024c..e725f48 100644
--- a/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4EDM4hep2LcioConv.ipp
+++ b/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4EDM4hep2LcioConv.ipp
@@ -48,6 +48,13 @@ std::unique_ptr<lcio::LCCollectionVec> convertTracks(const edm4hep::TrackCollect
         }
       }
 
+      lcio_tr->setNholes(edm_tr.getNholes());
+      const auto edmHoleNumbers = edm_tr.getSubdetectorHoleNumbers();
+      lcio_tr->subdetectorHoleNumbers().resize(edmHoleNumbers.size());
+      for (auto i = 0u; i < edmHoleNumbers.size(); ++i) {
+        lcio_tr->subdetectorHoleNumbers()[i] = edmHoleNumbers[i];
+      }
+
       // Loop over the track states in the track
       const auto edm_track_states = edm_tr.getTrackStates();
       for (const auto& tr_state : edm_track_states) {
diff --git a/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4Lcio2EDM4hepConv.ipp b/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4Lcio2EDM4hepConv.ipp
index 6169cfc..289f7f7 100644
--- a/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4Lcio2EDM4hepConv.ipp
+++ b/k4EDM4hep2LcioConv/include/k4EDM4hep2LcioConv/k4Lcio2EDM4hepConv.ipp
@@ -367,16 +367,22 @@ std::vector<CollNamePair> convertTracks(const std::string& name, EVENT::LCCollec
     lval.setType(rval->getType());
     lval.setChi2(rval->getChi2());
     lval.setNdf(rval->getNdf());
+    lval.setNholes(rval->getNholes());
 
     auto& dqdx = trackDqdx.getDQdx();
     dqdx.value = rval->getdEdx();
     dqdx.error = rval->getdEdxError();
 
-    auto subdetectorHitNum = rval->getSubdetectorHitNumbers();
+    const auto& subdetectorHitNum = rval->getSubdetectorHitNumbers();
     for (auto hitNum : subdetectorHitNum) {
       lval.addToSubdetectorHitNumbers(hitNum);
     }
-    auto& trackStates = rval->getTrackStates();
+    const auto& subdetectorHoleNum = rval->getSubdetectorHoleNumbers();
+    for (auto holeNum : subdetectorHoleNum) {
+      lval.addToSubdetectorHoleNumbers(holeNum);
+    }
+
+    const auto& trackStates = rval->getTrackStates();
     for (auto& trackState : trackStates) {
       lval.addToTrackStates(convertTrackState(trackState));
     }