diff --git a/src/apps/exchange/state_corp_services.py b/src/apps/exchange/state_corp_services.py
index 5cfc1ec..a0d519b 100644
--- a/src/apps/exchange/state_corp_services.py
+++ b/src/apps/exchange/state_corp_services.py
@@ -96,6 +96,10 @@ class StateCorpExchangeService:
         }
         data = {
             "organizations": cls._serialize_organizations(organizations),
+            "registry_memberships": cls._serialize_registry_memberships(
+                organizations=organizations,
+                actual_date=snapshot_date,
+            ),
             "industrial_certificates": cls._serialize_industrial_certificates(
                 allowed_inns
             ),
@@ -123,6 +127,7 @@ class StateCorpExchangeService:
                 "package_id": package_id,
                 "source_system": source_system,
                 "produced_at": produced_at.isoformat(),
+                "actual_date": snapshot_date.isoformat(),
                 "schema_version": cls.SCHEMA_VERSION,
                 "sections": [key for key, items in data.items() if items],
             },
@@ -323,6 +328,47 @@ class StateCorpExchangeService:
             for item in organizations
         ]
 
+    @classmethod
+    def _serialize_registry_memberships(
+        cls,
+        *,
+        organizations: list[Organization],
+        actual_date: date,
+    ) -> list[dict[str, str | None]]:
+        organization_ids = [organization.id for organization in organizations]
+        if not organization_ids:
+            return []
+
+        memberships = (
+            RegistryMembershipPeriod.objects.select_related("registry", "organization")
+            .filter(
+                organization_id__in=organization_ids,
+                registry__name__in=cls.ROSATOM_ROSCOSMOS_REGISTRY_NAMES,
+                started_at__lte=actual_date,
+            )
+            .filter(Q(ended_at__isnull=True) | Q(ended_at__gt=actual_date))
+            .order_by(
+                "registry__name",
+                "organization__mn_inn",
+                "started_at",
+                "id",
+            )
+        )
+
+        return [
+            {
+                "organization_inn": str(membership.organization.mn_inn),
+                "registry_name": membership.registry.name,
+                "started_at": membership.started_at.isoformat(),
+                "ended_at": (
+                    membership.ended_at.isoformat()
+                    if membership.ended_at and membership.ended_at <= actual_date
+                    else None
+                ),
+            }
+            for membership in memberships
+        ]
+
     @classmethod
     def _serialize_industrial_certificates(
         cls,
diff --git a/tests/apps/exchange/test_state_corp_services.py b/tests/apps/exchange/test_state_corp_services.py
index 1c39544..f233c55 100644
--- a/tests/apps/exchange/test_state_corp_services.py
+++ b/tests/apps/exchange/test_state_corp_services.py
@@ -260,6 +260,7 @@ class StateCorpExchangeServiceTest(TestCase):
 
         package = StateCorpExchangeService.build_package(actual_date="2026-03-15")
         self.assertEqual(package.payload_counts["organizations"], 1)
+        self.assertEqual(package.payload_counts["registry_memberships"], 1)
         self.assertEqual(package.payload_counts["industrial_certificates"], 1)
         self.assertEqual(package.payload_counts["manufacturers"], 1)
         self.assertEqual(package.payload_counts["industrial_products"], 1)
@@ -277,6 +278,15 @@ class StateCorpExchangeServiceTest(TestCase):
         self.assertEqual(payload["format"], StateCorpExchangeService.PAYLOAD_FORMAT)
         self.assertEqual(payload["manifest"]["source_system"], "mostovik")
         self.assertEqual(payload["data"]["organizations"][0]["inn"], "7707083893")
+        self.assertEqual(
+            payload["data"]["registry_memberships"][0],
+            {
+                "organization_inn": "7707083893",
+                "registry_name": "Реестр госкорпорации Росатом",
+                "started_at": "2026-01-01",
+                "ended_at": None,
+            },
+        )
         self.assertEqual(
             payload["data"]["industrial_certificates"][0]["certificate_number"],
             "cert-001",
@@ -395,6 +405,13 @@ class StateCorpExchangeServiceTest(TestCase):
             [item["inn"] for item in payload["data"]["organizations"]],
             [str(target.mn_inn)],
         )
+        self.assertEqual(
+            [
+                (item["organization_inn"], item["registry_name"])
+                for item in payload["data"]["registry_memberships"]
+            ],
+            [(str(target.mn_inn), "Реестр госкорпорации Роскосмос")],
+        )
         self.assertEqual(
             [
                 item["registry_number"]