diff --git a/app/models/etablissement.rb b/app/models/etablissement.rb
index bf870e110..ef3b47d6c 100644
--- a/app/models/etablissement.rb
+++ b/app/models/etablissement.rb
@@ -66,6 +66,16 @@ class Etablissement < ApplicationRecord
     fermé: "fermé"
   }, _prefix: true
 
+  def entreprise_raison_sociale
+    read_attribute(:entreprise_raison_sociale).presence || raison_sociale_for_ei
+  end
+
+  def raison_sociale_for_ei
+    if entreprise_nom || entreprise_prenom
+      [entreprise_nom, entreprise_prenom].join(' ')
+    end
+  end
+
   def search_terms
     [
       entreprise_siren,
diff --git a/spec/models/etablissement_spec.rb b/spec/models/etablissement_spec.rb
index dce441520..a7f38d6cd 100644
--- a/spec/models/etablissement_spec.rb
+++ b/spec/models/etablissement_spec.rb
@@ -36,6 +36,30 @@ describe Etablissement do
     end
   end
 
+  describe '#entreprise_raison_sociale' do
+    subject { etablissement.entreprise_raison_sociale }
+
+    context "with nom and prenom" do
+      context "without raison sociale" do
+        let(:etablissement) { create(:etablissement, entreprise_raison_sociale: nil, entreprise_prenom: "Stef", entreprise_nom: "Sanseverino") }
+
+        it { is_expected.to eq "Sanseverino Stef" }
+      end
+
+      context "with raison sociale" do
+        let(:etablissement) { create(:etablissement, entreprise_raison_sociale: "Sansev Prod", entreprise_prenom: "Stef", entreprise_nom: "Sanseverino") }
+
+        it { is_expected.to eq "Sansev Prod" }
+      end
+    end
+
+    context "without nom and prenom" do
+      let(:etablissement) { create(:etablissement, entreprise_raison_sociale: "ENGIE", entreprise_prenom: nil, entreprise_nom: nil) }
+
+      it { is_expected.to eq "ENGIE" }
+    end
+  end
+
   describe '.entreprise_bilans_bdf_to_csv' do
     let(:etablissement) { build(:etablissement, entreprise_bilans_bdf: bilans) }
     let(:ordered_headers) {