diff --git a/src/govoplan_files/backend/manifest.py b/src/govoplan_files/backend/manifest.py
index 45e1de3..0711e27 100644
--- a/src/govoplan_files/backend/manifest.py
+++ b/src/govoplan_files/backend/manifest.py
@@ -140,6 +140,43 @@ def _tenant_summary(session, tenant_id: str) -> dict[str, int]:
     }
 
 
+def _tenant_summary_batch(session, tenant_ids) -> dict[str, dict[str, int]]:
+    from sqlalchemy import func
+
+    from govoplan_files.backend.db.models import FileAsset, FileConnectorCredential, FileConnectorPolicy, FileConnectorProfile, FileConnectorSpace
+
+    ids = tuple(dict.fromkeys(str(tenant_id) for tenant_id in tenant_ids if tenant_id))
+    if not ids:
+        return {}
+    counts: dict[str, dict[str, int]] = {
+        tenant_id: {
+            "files": 0,
+            "connector_credentials": 0,
+            "connector_policies": 0,
+            "connector_profiles": 0,
+            "connector_spaces": 0,
+        }
+        for tenant_id in ids
+    }
+    models = (
+        ("files", FileAsset),
+        ("connector_credentials", FileConnectorCredential),
+        ("connector_policies", FileConnectorPolicy),
+        ("connector_profiles", FileConnectorProfile),
+        ("connector_spaces", FileConnectorSpace),
+    )
+    for count_key, model in models:
+        rows = (
+            session.query(model.tenant_id, func.count(model.id))
+            .filter(model.tenant_id.in_(ids))
+            .group_by(model.tenant_id)
+            .all()
+        )
+        for tenant_id, count in rows:
+            counts[tenant_id][count_key] = int(count)
+    return counts
+
+
 def _veto_group_delete(session, tenant_id: str, group_id: str) -> None:
     from govoplan_files.backend.db.models import FileAsset, FileConnectorSpace, FileFolder, FileShare
 
@@ -189,6 +226,7 @@ manifest = ModuleManifest(
     route_factory=_files_router,
     role_templates=ROLE_TEMPLATES,
     tenant_summary_providers=(_tenant_summary,),
+    tenant_summary_batch_providers=(_tenant_summary_batch,),
     delete_veto_providers={"group": (_veto_group_delete,)},
     nav_items=(NavItem(path="/files", label="Files", icon="folder", required_any=("files:file:read",), order=40),),
     frontend=FrontendModule(
diff --git a/tests/test_tenant_summary_batch.py b/tests/test_tenant_summary_batch.py
new file mode 100644
index 0000000..980d48d
--- /dev/null
+++ b/tests/test_tenant_summary_batch.py
@@ -0,0 +1,108 @@
+from __future__ import annotations
+
+import unittest
+
+from sqlalchemy import create_engine, event
+from sqlalchemy.orm import Session
+
+from govoplan_access.backend.db.models import Account, Group, User
+from govoplan_core.core.change_sequence import ChangeSequenceEntry
+from govoplan_core.db.base import Base
+from govoplan_files.backend.db.models import (
+    FileAsset,
+    FileConnectorCredential,
+    FileConnectorPolicy,
+    FileConnectorProfile,
+    FileConnectorSpace,
+)
+from govoplan_files.backend.manifest import _tenant_summary_batch
+
+
+class FilesTenantSummaryBatchTests(unittest.TestCase):
+    def test_batch_summary_uses_one_grouped_query_per_owned_table(self) -> None:
+        engine = create_engine("sqlite+pysqlite:///:memory:")
+        Base.metadata.create_all(
+            engine,
+            tables=[
+                Account.__table__,
+                User.__table__,
+                Group.__table__,
+                FileAsset.__table__,
+                FileConnectorCredential.__table__,
+                FileConnectorPolicy.__table__,
+                FileConnectorProfile.__table__,
+                FileConnectorSpace.__table__,
+                ChangeSequenceEntry.__table__,
+            ],
+        )
+        try:
+            with Session(engine) as session:
+                session.add_all(
+                    [
+                        FileAsset(
+                            id="file-1",
+                            tenant_id="tenant-1",
+                            owner_type="tenant",
+                            display_path="/one.txt",
+                            filename="one.txt",
+                        ),
+                        FileConnectorCredential(
+                            id="credential-1",
+                            tenant_id="tenant-1",
+                            label="Credential",
+                        ),
+                        FileConnectorPolicy(
+                            id="policy-1",
+                            tenant_id="tenant-1",
+                            scope_type="tenant",
+                        ),
+                        FileConnectorProfile(
+                            id="profile-1",
+                            tenant_id="tenant-1",
+                            label="Profile",
+                            provider="webdav",
+                        ),
+                        FileConnectorSpace(
+                            id="space-1",
+                            tenant_id="tenant-1",
+                            owner_type="tenant",
+                            label="Space",
+                            connector_profile_id="profile-1",
+                            provider="webdav",
+                        ),
+                    ]
+                )
+                session.commit()
+                query_count = 0
+
+                def count_query(*_args: object) -> None:
+                    nonlocal query_count
+                    query_count += 1
+
+                event.listen(engine, "before_cursor_execute", count_query)
+                try:
+                    counts = _tenant_summary_batch(
+                        session,
+                        ["tenant-1", "tenant-empty"],
+                    )
+                finally:
+                    event.remove(engine, "before_cursor_execute", count_query)
+
+            self.assertEqual(5, query_count)
+            self.assertEqual(
+                {
+                    "files": 1,
+                    "connector_credentials": 1,
+                    "connector_policies": 1,
+                    "connector_profiles": 1,
+                    "connector_spaces": 1,
+                },
+                counts["tenant-1"],
+            )
+            self.assertEqual(0, counts["tenant-empty"]["files"])
+        finally:
+            engine.dispose()
+
+
+if __name__ == "__main__":
+    unittest.main()