diff --git a/monitoring/benchmarks/views.py b/monitoring/benchmarks/views.py
index d45ab66..736d6ba 100644
--- a/monitoring/benchmarks/views.py
+++ b/monitoring/benchmarks/views.py
@@ -13,7 +13,9 @@
 from monitoring.benchmarks.serializers import BenchmarksBySubmithostSerializer
 
 class BenchmarksViewSet(viewsets.ReadOnlyModelViewSet):
-    queryset = BenchmarksBySubmithost.objects.all().order_by(Lower('SiteName'))
+    # Lower('SiteName'): sorts sites alphabetically, case-insensitively.
+    # '-UpdateTime': sorts records within each site by UpdateTime in descending order (latest first).
+    queryset = BenchmarksBySubmithost.objects.all().order_by(Lower('SiteName'), '-UpdateTime')
 
     serializer_class = BenchmarksBySubmithostSerializer
     template_name = 'benchmarks_by_submithost.html'