diff --git a/app/services/api_entreprise_service.rb b/app/services/api_entreprise_service.rb
index 8eb5f4ed8..5f429d629 100644
--- a/app/services/api_entreprise_service.rb
+++ b/app/services/api_entreprise_service.rb
@@ -15,6 +15,9 @@ class APIEntrepriseService
       etablissement_params = APIEntreprise::EtablissementAdapter.new(siret, procedure_id).to_params
       return nil if etablissement_params.empty?
 
+      entreprise_params = APIEntreprise::EntrepriseAdapter.new(siret, procedure_id).to_params
+      etablissement_params.merge!(entreprise_params) if entreprise_params.any?
+
       etablissement = dossier_or_champ.build_etablissement(etablissement_params)
       etablissement.save!
 
diff --git a/spec/controllers/champs/siret_controller_spec.rb b/spec/controllers/champs/siret_controller_spec.rb
index 81a9b6dbd..2b1f5f42a 100644
--- a/spec/controllers/champs/siret_controller_spec.rb
+++ b/spec/controllers/champs/siret_controller_spec.rb
@@ -31,6 +31,8 @@ describe Champs::SiretController, type: :controller do
         sign_in user
         stub_request(:get, /https:\/\/entreprise.api.gouv.fr\/v2\/etablissements\/#{siret}/)
           .to_return(status: api_etablissement_status, body: api_etablissement_body)
+        stub_request(:get, /https:\/\/entreprise.api.gouv.fr\/v2\/entreprises\/#{siret[0..8]}/)
+          .to_return(status: 200, body: File.read('spec/fixtures/files/api_entreprise/entreprises.json'))
         allow_any_instance_of(APIEntrepriseToken).to receive(:roles)
           .and_return(["attestations_fiscales", "attestations_sociales", "bilans_entreprise_bdf"])
         allow_any_instance_of(APIEntrepriseToken).to receive(:expired?).and_return(token_expired)
diff --git a/spec/controllers/users/dossiers_controller_spec.rb b/spec/controllers/users/dossiers_controller_spec.rb
index 3f760ff38..57398f090 100644
--- a/spec/controllers/users/dossiers_controller_spec.rb
+++ b/spec/controllers/users/dossiers_controller_spec.rb
@@ -196,6 +196,8 @@ describe Users::DossiersController, type: :controller do
       sign_in(user)
       stub_request(:get, /https:\/\/entreprise.api.gouv.fr\/v2\/etablissements\/#{siret}/)
         .to_return(status: api_etablissement_status, body: api_etablissement_body)
+      stub_request(:get, /https:\/\/entreprise.api.gouv.fr\/v2\/entreprises\/#{siren}/)
+        .to_return(body: File.read('spec/fixtures/files/api_entreprise/entreprises.json'), status: 200)
       allow_any_instance_of(APIEntrepriseToken).to receive(:roles)
         .and_return(["attestations_fiscales", "attestations_sociales", "bilans_entreprise_bdf"])
       allow_any_instance_of(APIEntrepriseToken).to receive(:expired?).and_return(token_expired)
diff --git a/spec/models/concern/siret_champ_etablissement_fetchable_concern_spec.rb b/spec/models/concern/siret_champ_etablissement_fetchable_concern_spec.rb
index 19151c31a..6a2c11120 100644
--- a/spec/models/concern/siret_champ_etablissement_fetchable_concern_spec.rb
+++ b/spec/models/concern/siret_champ_etablissement_fetchable_concern_spec.rb
@@ -8,6 +8,8 @@ RSpec.describe SiretChampEtablissementFetchableConcern do
     before do
       stub_request(:get, /https:\/\/entreprise.api.gouv.fr\/v2\/etablissements\/#{siret}/)
         .to_return(status: api_etablissement_status, body: api_etablissement_body)
+      stub_request(:get, /https:\/\/entreprise.api.gouv.fr\/v2\/entreprises\/#{siret[0..8]}/)
+        .to_return(body: File.read('spec/fixtures/files/api_entreprise/entreprises.json'), status: 200)
       allow_any_instance_of(APIEntrepriseToken).to receive(:roles)
         .and_return(["attestations_fiscales", "attestations_sociales", "bilans_entreprise_bdf"])
       allow_any_instance_of(APIEntrepriseToken).to receive(:expired?).and_return(token_expired)
@@ -103,6 +105,11 @@ RSpec.describe SiretChampEtablissementFetchableConcern do
       it { expect { fetch_etablissement! }.to change { Etablissement.count }.by(1) }
 
       it { expect(fetch_etablissement!).to eq(true) }
+
+      it "fetches the entreprise raison sociale" do
+        fetch_etablissement!
+        expect(champ.reload.etablissement.entreprise_raison_sociale).to eq("OCTO-TECHNOLOGY")
+      end
     end
   end
 end
diff --git a/spec/services/api_entreprise_service_spec.rb b/spec/services/api_entreprise_service_spec.rb
index 93ec39539..fd7cc7ada 100644
--- a/spec/services/api_entreprise_service_spec.rb
+++ b/spec/services/api_entreprise_service_spec.rb
@@ -15,11 +15,16 @@ describe APIEntrepriseService do
     before do
       stub_request(:get, /https:\/\/entreprise.api.gouv.fr\/v2\/etablissements\/#{siret}/)
         .to_return(body: etablissements_body, status: etablissements_status)
+      stub_request(:get, /https:\/\/entreprise.api.gouv.fr\/v2\/entreprises\/#{siret[0..8]}/)
+        .to_return(body: entreprises_body, status: entreprises_status)
     end
 
     let(:siret) { '41816609600051' }
+    let(:raison_sociale) { "OCTO-TECHNOLOGY" }
     let(:etablissements_status) { 200 }
     let(:etablissements_body) { File.read('spec/fixtures/files/api_entreprise/etablissements.json') }
+    let(:entreprises_status) { 200 }
+    let(:entreprises_body) { File.read('spec/fixtures/files/api_entreprise/entreprises.json') }
     let(:valid_token) { "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c" }
     let(:procedure) { create(:procedure, api_entreprise_token: valid_token) }
     let(:dossier) { create(:dossier, procedure: procedure) }
@@ -35,6 +40,10 @@ describe APIEntrepriseService do
         expect(subject[:siret]).to eq(siret)
       end
 
+      it 'should fetch entreprise params' do
+        expect(subject[:entreprise_raison_sociale]).to eq(raison_sociale)
+      end
+
       it_behaves_like 'schedule fetch of all etablissement params'
     end
 
diff --git a/spec/system/users/dossier_prefill_get_spec.rb b/spec/system/users/dossier_prefill_get_spec.rb
index 21b40fa1f..ada1cf6bc 100644
--- a/spec/system/users/dossier_prefill_get_spec.rb
+++ b/spec/system/users/dossier_prefill_get_spec.rb
@@ -59,6 +59,9 @@ describe 'Prefilling a dossier (with a GET request):', js: true do
     stub_request(:get, /https:\/\/entreprise.api.gouv.fr\/v2\/etablissements\//)
       .to_return(status: 200, body: File.read('spec/fixtures/files/api_entreprise/etablissements.json'))
 
+    stub_request(:get, /https:\/\/entreprise.api.gouv.fr\/v2\/entreprises\/#{siret_value[0..8]}/)
+      .to_return(status: 200, body: File.read('spec/fixtures/files/api_entreprise/entreprises.json'))
+
     VCR.insert_cassette('api_geo_departements')
     VCR.insert_cassette('api_geo_communes')
     VCR.insert_cassette('api_geo_epcis')
diff --git a/spec/system/users/dossier_prefill_post_spec.rb b/spec/system/users/dossier_prefill_post_spec.rb
index eebb5462d..a9b4eae82 100644
--- a/spec/system/users/dossier_prefill_post_spec.rb
+++ b/spec/system/users/dossier_prefill_post_spec.rb
@@ -40,6 +40,9 @@ describe 'Prefilling a dossier (with a POST request):', js: true do
     stub_request(:get, /https:\/\/entreprise.api.gouv.fr\/v2\/etablissements\/#{siret_value}/)
       .to_return(status: 200, body: File.read('spec/fixtures/files/api_entreprise/etablissements.json'))
 
+    stub_request(:get, /https:\/\/entreprise.api.gouv.fr\/v2\/entreprises\/#{siret_value[0..8]}/)
+      .to_return(status: 200, body: File.read('spec/fixtures/files/api_entreprise/entreprises.json'))
+
     VCR.insert_cassette('api_geo_departements')
     VCR.insert_cassette('api_geo_communes')
     VCR.insert_cassette('api_geo_epcis')