diff --git a/lms/djangoapps/mobile_api/users/serializers.py b/lms/djangoapps/mobile_api/users/serializers.py
index 76453dc4a6b4..82389199ef72 100644
--- a/lms/djangoapps/mobile_api/users/serializers.py
+++ b/lms/djangoapps/mobile_api/users/serializers.py
@@ -257,7 +257,7 @@ def get_progress(self, model: CourseEnrollment) -> Dict[str, int]:
         """
         return self.calculate_progress(model)
 
-    def get_course_assignments(self, model: CourseEnrollment) -> Optional[Dict[str, List[Dict[str, str]]]]:
+    def get_course_assignments(self, model: CourseEnrollment) -> Dict[str, Optional[List[Dict[str, str]]]]:
         """
         Returns the future assignment data and past assignments data for the user in the course.
         """
@@ -267,20 +267,28 @@ def get_course_assignments(self, model: CourseEnrollment) -> Optional[Dict[str,
             self.context.get('request'),
             include_past_dates=True
         )
-        next_assignment = None
-        past_assignment = []
+        past_assignments = []
+        future_assignments = []
 
         timezone = get_user_timezone_or_last_seen_timezone_or_utc(model.user)
         for assignment in sorted(assignments, key=lambda x: x.date):
             if assignment.date < datetime.now(timezone):
-                past_assignment.append(assignment)
+                past_assignments.append(assignment)
             else:
-                next_assignment = DateSummarySerializer(assignment).data
-                break
+                if not assignment.complete:
+                    future_assignments.append(assignment)
+
+        if future_assignments:
+            future_assignment_date = future_assignments[0].date.date()
+            next_assignments = [
+                assignment for assignment in future_assignments if assignment.date.date() == future_assignment_date
+            ]
+        else:
+            next_assignments = []
 
         return {
-            'future_assignment': next_assignment,
-            'past_assignments': DateSummarySerializer(past_assignment, many=True).data,
+            'future_assignments': DateSummarySerializer(next_assignments, many=True).data,
+            'past_assignments': DateSummarySerializer(past_assignments, many=True).data,
         }
 
     class Meta:
diff --git a/lms/djangoapps/mobile_api/users/tests.py b/lms/djangoapps/mobile_api/users/tests.py
index 5b842851db0b..05a75f30f5c3 100644
--- a/lms/djangoapps/mobile_api/users/tests.py
+++ b/lms/djangoapps/mobile_api/users/tests.py
@@ -902,6 +902,21 @@ def test_user_enrollment_api_v4_status_all(self):
         self.assertEqual(enrollments['results'][2]['course']['id'], str(old_course.id))
         self.assertNotIn('primary', response.data)
 
+    @patch('lms.djangoapps.mobile_api.users.serializers.cache.set', return_value=None)
+    def test_response_contains_primary_enrollment_assignments_info(self, cache_mock: MagicMock):
+        self.login()
+        course = CourseFactory.create(org='edx', mobile_available=True)
+        self.enroll(course.id)
+
+        response = self.api_response(api_version=API_V4)
+
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertIn('course_assignments', response.data['primary'])
+        self.assertIn('past_assignments', response.data['primary']['course_assignments'])
+        self.assertIn('future_assignments', response.data['primary']['course_assignments'])
+        self.assertListEqual(response.data['primary']['course_assignments']['past_assignments'], [])
+        self.assertListEqual(response.data['primary']['course_assignments']['future_assignments'], [])
+
 
 @override_settings(MKTG_URLS={'ROOT': 'dummy-root'})
 class TestUserEnrollmentCertificates(UrlResetMixin, MobileAPITestCase, MilestonesTestCaseMixin):