diff --git a/cirq-core/cirq/sim/simulator_base.py b/cirq-core/cirq/sim/simulator_base.py
index e56c440eced..20b752446b8 100644
--- a/cirq-core/cirq/sim/simulator_base.py
+++ b/cirq-core/cirq/sim/simulator_base.py
@@ -225,7 +225,6 @@ def _core_iterator(
             step_result = self._create_step_result(sim_state)
             yield step_result
             sim_state = step_result._sim_state
-            sim_state.log_of_measurement_results.clear()
 
     # pylint: enable=missing-param-doc,missing-raises-doc
     def _run(
@@ -275,10 +274,11 @@ def _run(
                 sim_state=act_on_args.copy() if i < repetitions - 1 else act_on_args,
             )
             for step_result in all_step_results:
-                for k, v in step_result.measurements.items():
-                    if k not in measurements:
-                        measurements[k] = []
-                    measurements[k].append(np.array(v, dtype=np.uint8))
+                pass
+            for k, v in step_result.measurements.items():
+                if k not in measurements:
+                    measurements[k] = []
+                measurements[k].append(np.array(v, dtype=np.uint8))
         return {k: np.array(v) for k, v in measurements.items()}
 
     def _create_act_on_args(
diff --git a/cirq-core/cirq/sim/simulator_base_test.py b/cirq-core/cirq/sim/simulator_base_test.py
index f3fe26a1b32..b8f9e8b55bb 100644
--- a/cirq-core/cirq/sim/simulator_base_test.py
+++ b/cirq-core/cirq/sim/simulator_base_test.py
@@ -374,3 +374,15 @@ def test_sim_state_instance_gets_changes_from_step_result(split: bool):
         args = sim._create_act_on_args(0, (q0, q1))
         step._sim_state = args
         assert (step._merged_sim_state is not args) == split
+
+
+def test_measurements_retained_in_step_results():
+    sim = SplittableCountingSimulator()
+    circuit = cirq.Circuit(
+        cirq.measure(q0, key='a'), cirq.measure(q0, key='b'), cirq.measure(q0, key='c')
+    )
+    iterator = sim.simulate_moment_steps(circuit)
+    assert next(iterator).measurements.keys() == {'a'}
+    assert next(iterator).measurements.keys() == {'a', 'b'}
+    assert next(iterator).measurements.keys() == {'a', 'b', 'c'}
+    assert not any(iterator)