diff --git a/core/src/main/java/com/google/adk/agents/LlmAgent.java b/core/src/main/java/com/google/adk/agents/LlmAgent.java
index 737058039..46b0b1f50 100644
--- a/core/src/main/java/com/google/adk/agents/LlmAgent.java
+++ b/core/src/main/java/com/google/adk/agents/LlmAgent.java
@@ -622,6 +622,12 @@ protected BaseLlmFlow determineLlmFlow() {
   }
 
   private void maybeSaveOutputToState(Event event) {
+    // Events from another agent, e.g. a transfer target, must not overwrite this agent's output.
+    if (!name().equals(event.author())) {
+      logger.debug(
+          "Skipping output save for agent {}: event authored by {}", name(), event.author());
+      return;
+    }
     if (outputKey().isEmpty() || !event.finalResponse() || event.content().isEmpty()) {
       return;
     }
diff --git a/core/src/test/java/com/google/adk/agents/LlmAgentTest.java b/core/src/test/java/com/google/adk/agents/LlmAgentTest.java
index d017860ce..ffe581bef 100644
--- a/core/src/test/java/com/google/adk/agents/LlmAgentTest.java
+++ b/core/src/test/java/com/google/adk/agents/LlmAgentTest.java
@@ -25,6 +25,7 @@
 import static com.google.adk.testing.TestUtils.createTestLlm;
 import static com.google.adk.testing.TestUtils.createTextLlmResponse;
 import static com.google.adk.testing.TestUtils.simplifyEvents;
+import static com.google.common.collect.Iterables.getLast;
 import static com.google.common.collect.Iterables.getOnlyElement;
 import static com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.assertEquals;
@@ -177,6 +178,33 @@ public void testRun_withOutputKey_savesState_ignoresThoughts() {
     assertThat(events.get(0).actions().stateDelta()).containsEntry("myOutput", "Saved output");
   }
 
+  @Test
+  public void testRun_withOutputKey_doesNotSaveTheOutputOfATransferredToAgent() {
+    LlmAgent subAgent =
+        createTestAgentBuilder(createTestLlm(createTextLlmResponse("Sub-agent answer")))
+            .name("sub_agent")
+            .outputKey("subAgentOutput")
+            .build();
+    Content transferCall =
+        Content.fromParts(
+            Part.fromFunctionCall("transfer_to_agent", ImmutableMap.of("agent_name", "sub_agent")));
+    LlmAgent agent =
+        createTestAgentBuilder(createTestLlm(createLlmResponse(transferCall)))
+            .outputKey("myOutput")
+            .subAgents(subAgent)
+            .build();
+    InvocationContext invocationContext = createInvocationContext(agent);
+
+    List<Event> events = agent.runAsync(invocationContext).toList().blockingGet();
+
+    Event subAgentAnswer = getLast(events);
+    assertThat(subAgentAnswer.author()).isEqualTo("sub_agent");
+    assertThat(subAgentAnswer.finalResponse()).isTrue();
+    assertThat(subAgentAnswer.actions().stateDelta()).doesNotContainKey("myOutput");
+    assertThat(subAgentAnswer.actions().stateDelta())
+        .containsEntry("subAgentOutput", "Sub-agent answer");
+  }
+
   @Test
   public void testRun_withoutOutputKey_doesNotSaveState() {
     Content modelContent = Content.fromParts(Part.fromText("Some output"));