diff --git a/frontend/app/pages/constructeurs.vue b/frontend/app/pages/constructeurs.vue
index eeef20f..95b2bdd 100644
--- a/frontend/app/pages/constructeurs.vue
+++ b/frontend/app/pages/constructeurs.vue
@@ -48,6 +48,39 @@
             <span class="whitespace-nowrap">{{ formatDate(row.createdAt) }}</span>
           </template>
 
+          <template #cell-composantCount="{ row }">
+            <NuxtLink
+              v-if="stats[row.id]?.composantCount"
+              :to="`/catalogues/composants?constructeur=${row.id}`"
+              class="badge badge-ghost badge-sm hover:badge-primary transition-colors"
+            >
+              {{ stats[row.id].composantCount }}
+            </NuxtLink>
+            <span v-else class="text-base-content/30">—</span>
+          </template>
+
+          <template #cell-pieceCount="{ row }">
+            <NuxtLink
+              v-if="stats[row.id]?.pieceCount"
+              :to="`/catalogues/pieces?constructeur=${row.id}`"
+              class="badge badge-ghost badge-sm hover:badge-primary transition-colors"
+            >
+              {{ stats[row.id].pieceCount }}
+            </NuxtLink>
+            <span v-else class="text-base-content/30">—</span>
+          </template>
+
+          <template #cell-machineCount="{ row }">
+            <NuxtLink
+              v-if="stats[row.id]?.machineCount"
+              :to="`/machines?constructeur=${row.id}`"
+              class="badge badge-ghost badge-sm hover:badge-primary transition-colors"
+            >
+              {{ stats[row.id].machineCount }}
+            </NuxtLink>
+            <span v-else class="text-base-content/30">—</span>
+          </template>
+
           <template #cell-actions="{ row }">
             <div class="flex items-center justify-end gap-2">
               <button class="btn btn-ghost btn-xs" @click="openEditModal(row)">
@@ -103,6 +136,7 @@ import { formatPhone } from '~/utils/formatters/phone'
 import { formatFrenchDate } from '~/utils/date'
 import IconLucidePlus from '~icons/lucide/plus'
 
+const api = useApi()
 const { canEdit } = usePermissions()
 const { constructeurs, loading, searchConstructeurs, createConstructeur, updateConstructeur, deleteConstructeur, loadConstructeurs } = useConstructeurs()
 const { showError } = useToast()
@@ -112,12 +146,16 @@ const columns = [
   { key: 'email', label: 'Email', sortable: true },
   { key: 'phone', label: 'Téléphone', sortable: true },
   { key: 'createdAt', label: 'Date de création', sortable: true },
+  { key: 'composantCount', label: 'Composants', align: 'center' },
+  { key: 'pieceCount', label: 'Pièces', align: 'center' },
+  { key: 'machineCount', label: 'Machines', align: 'center' },
   { key: 'actions', label: 'Actions', align: 'right' },
 ]
 
 const searchTerm = ref('')
 const sortKey = usePersistedValue('constructeurs-sort', 'name')
 const sortDir = ref('asc')
+const stats = ref({})
 
 const currentSort = computed(() => ({
   field: sortKey.value,
@@ -236,5 +274,15 @@ const confirmDelete = async (constructeur) => {
   }
 }
 
-onMounted(() => loadConstructeurs())
+const loadStats = async () => {
+  const result = await api.get('/constructeurs/stats')
+  if (result.success && result.data) {
+    stats.value = result.data
+  }
+}
+
+onMounted(() => {
+  loadConstructeurs()
+  loadStats()
+})
 </script>
diff --git a/src/Controller/ModelTypeRelatedItemsController.php b/src/Controller/ModelTypeRelatedItemsController.php
new file mode 100644
index 0000000..cb13e43
--- /dev/null
+++ b/src/Controller/ModelTypeRelatedItemsController.php
@@ -0,0 +1,142 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controller;
+
+use App\Entity\Composant;
+use App\Entity\MachineComponentLink;
+use App\Entity\MachinePieceLink;
+use App\Entity\MachineProductLink;
+use App\Entity\Piece;
+use App\Entity\Product;
+use App\Enum\ModelCategory;
+use App\Repository\ModelTypeRepository;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+
+#[Route('/api/model_types/{id}')]
+final class ModelTypeRelatedItemsController extends AbstractController
+{
+    public function __construct(
+        private readonly ModelTypeRepository $modelTypes,
+        private readonly EntityManagerInterface $em,
+    ) {}
+
+    #[Route('/related-items', name: 'api_model_type_related_items', methods: ['GET'])]
+    public function relatedItems(string $id): JsonResponse
+    {
+        $this->denyAccessUnlessGranted('ROLE_VIEWER');
+
+        $modelType = $this->modelTypes->find($id);
+
+        if (!$modelType) {
+            return new JsonResponse(
+                ['message' => 'Catégorie introuvable.'],
+                Response::HTTP_NOT_FOUND,
+            );
+        }
+
+        $items = match ($modelType->getCategory()) {
+            ModelCategory::COMPONENT => $this->fetchComposantsWithMachineCount($id),
+            ModelCategory::PIECE     => $this->fetchPiecesWithMachineCount($id),
+            ModelCategory::PRODUCT   => $this->fetchProductsWithMachineCount($id),
+        };
+
+        return new JsonResponse($items);
+    }
+
+    /**
+     * @return list<array{id: string, name: string, reference: null|string, machineCount: int}>
+     */
+    private function fetchComposantsWithMachineCount(string $modelTypeId): array
+    {
+        $qb = $this->em->createQueryBuilder();
+        $qb->select(
+            'c.id',
+            'c.name',
+            'c.reference',
+            'COALESCE(c.referenceAuto, c.reference) as displayReference',
+            'COUNT(DISTINCT mcl.id) as machineCount',
+        )
+            ->from(Composant::class, 'c')
+            ->leftJoin(MachineComponentLink::class, 'mcl', 'WITH', 'mcl.composant = c')
+            ->where('c.typeComposant = :modelTypeId')
+            ->setParameter('modelTypeId', $modelTypeId)
+            ->groupBy('c.id', 'c.name', 'c.reference', 'c.referenceAuto')
+            ->orderBy('c.name', 'ASC')
+        ;
+
+        return $this->formatResults($qb->getQuery()->getArrayResult());
+    }
+
+    /**
+     * @return list<array{id: string, name: string, reference: null|string, machineCount: int}>
+     */
+    private function fetchPiecesWithMachineCount(string $modelTypeId): array
+    {
+        $qb = $this->em->createQueryBuilder();
+        $qb->select(
+            'p.id',
+            'p.name',
+            'p.reference',
+            'COALESCE(p.referenceAuto, p.reference) as displayReference',
+            'COUNT(DISTINCT mpl.id) as machineCount',
+        )
+            ->from(Piece::class, 'p')
+            ->leftJoin(MachinePieceLink::class, 'mpl', 'WITH', 'mpl.piece = p')
+            ->where('p.typePiece = :modelTypeId')
+            ->setParameter('modelTypeId', $modelTypeId)
+            ->groupBy('p.id', 'p.name', 'p.reference', 'p.referenceAuto')
+            ->orderBy('p.name', 'ASC')
+        ;
+
+        return $this->formatResults($qb->getQuery()->getArrayResult());
+    }
+
+    /**
+     * @return list<array{id: string, name: string, reference: null|string, machineCount: int}>
+     */
+    private function fetchProductsWithMachineCount(string $modelTypeId): array
+    {
+        $qb = $this->em->createQueryBuilder();
+        $qb->select(
+            'pr.id',
+            'pr.name',
+            'pr.reference',
+            'COUNT(DISTINCT mpl.id) as machineCount',
+        )
+            ->from(Product::class, 'pr')
+            ->leftJoin(MachineProductLink::class, 'mpl', 'WITH', 'mpl.product = pr')
+            ->where('pr.typeProduct = :modelTypeId')
+            ->setParameter('modelTypeId', $modelTypeId)
+            ->groupBy('pr.id', 'pr.name', 'pr.reference')
+            ->orderBy('pr.name', 'ASC')
+        ;
+
+        return $this->formatResults($qb->getQuery()->getArrayResult());
+    }
+
+    /**
+     * @param array<int, array<string, mixed>> $rows
+     *
+     * @return list<array{id: string, name: string, reference: null|string, machineCount: int}>
+     */
+    private function formatResults(array $rows): array
+    {
+        return array_values(array_map(
+            static fn (array $row): array => [
+                'id'        => (string) $row['id'],
+                'name'      => (string) ($row['name'] ?? ''),
+                'reference' => isset($row['displayReference']) && '' !== $row['displayReference']
+                    ? (string) $row['displayReference']
+                    : (isset($row['reference']) && '' !== $row['reference'] ? (string) $row['reference'] : null),
+                'machineCount' => (int) $row['machineCount'],
+            ],
+            $rows,
+        ));
+    }
+}