diff --git a/clients/src/main/java/org/apache/kafka/common/requests/ReadShareGroupStateSummaryResponse.java b/clients/src/main/java/org/apache/kafka/common/requests/ReadShareGroupStateSummaryResponse.java
index a2787ff82c96e..4f8c1c3b0cb57 100644
--- a/clients/src/main/java/org/apache/kafka/common/requests/ReadShareGroupStateSummaryResponse.java
+++ b/clients/src/main/java/org/apache/kafka/common/requests/ReadShareGroupStateSummaryResponse.java
@@ -99,6 +99,7 @@ public static ReadShareGroupStateSummaryResponseData toResponseData(
         Uuid topicId,
         int partition,
         long startOffset,
+        int deliveryCompleteCount,
         int leaderEpoch,
         int stateEpoch
     ) {
@@ -110,6 +111,7 @@ public static ReadShareGroupStateSummaryResponseData toResponseData(
                         new ReadShareGroupStateSummaryResponseData.PartitionResult()
                             .setPartition(partition)
                             .setStartOffset(startOffset)
+                            .setDeliveryCompleteCount(deliveryCompleteCount)
                             .setLeaderEpoch(leaderEpoch)
                             .setStateEpoch(stateEpoch)
                     ))
diff --git a/clients/src/main/resources/common/message/ReadShareGroupStateSummaryRequest.json b/clients/src/main/resources/common/message/ReadShareGroupStateSummaryRequest.json
index cdbad63bfa22b..6e2bc52654a45 100644
--- a/clients/src/main/resources/common/message/ReadShareGroupStateSummaryRequest.json
+++ b/clients/src/main/resources/common/message/ReadShareGroupStateSummaryRequest.json
@@ -18,7 +18,10 @@
   "type": "request",
   "listeners": ["broker"],
   "name": "ReadShareGroupStateSummaryRequest",
-  "validVersions": "0",
+  // Version 0 is the initial version (KIP-932).
+  //
+  // Version 1 introduces DeliveryCompleteCount in the response (KIP-1226).
+  "validVersions": "0-1",
   "flexibleVersions": "0+",
   "fields": [
     { "name": "GroupId", "type": "string", "versions": "0+",
diff --git a/clients/src/main/resources/common/message/ReadShareGroupStateSummaryResponse.json b/clients/src/main/resources/common/message/ReadShareGroupStateSummaryResponse.json
index 81e3edc554ece..993043addeec5 100644
--- a/clients/src/main/resources/common/message/ReadShareGroupStateSummaryResponse.json
+++ b/clients/src/main/resources/common/message/ReadShareGroupStateSummaryResponse.json
@@ -17,7 +17,10 @@
   "apiKey": 87,
   "type": "response",
   "name": "ReadShareGroupStateSummaryResponse",
-  "validVersions": "0",
+  // Version 0 is the initial version (KIP-932).
+  //
+  // Version 1 introduces DeliveryCompleteCount (KIP-1226).
+  "validVersions": "0-1",
   "flexibleVersions": "0+",
   // - NOT_COORDINATOR (version 0+)
   // - COORDINATOR_NOT_AVAILABLE (version 0+)
@@ -44,7 +47,9 @@
         { "name": "LeaderEpoch", "type": "int32", "versions": "0+",
           "about": "The leader epoch of the share-partition." },
         { "name": "StartOffset", "type": "int64", "versions": "0+",
-          "about": "The share-partition start offset." }
+          "about": "The share-partition start offset." },
+        { "name": "DeliveryCompleteCount", "type": "int32", "versions": "1+", "ignorable": "true", "default": "-1",
+          "about": "The number of offsets greater than or equal to share-partition start offset for which delivery has been completed." }
       ]}
     ]}
   ]
diff --git a/core/src/test/scala/unit/kafka/server/KafkaApisTest.scala b/core/src/test/scala/unit/kafka/server/KafkaApisTest.scala
index 01daa19d7a01d..691814b94b419 100644
--- a/core/src/test/scala/unit/kafka/server/KafkaApisTest.scala
+++ b/core/src/test/scala/unit/kafka/server/KafkaApisTest.scala
@@ -12240,6 +12240,7 @@ class KafkaApisTest extends Logging {
             .setErrorMessage(null)
             .setStateEpoch(1)
             .setStartOffset(10)
+            .setDeliveryCompleteCount(0)
         ))
     )
 
@@ -12280,6 +12281,7 @@ class KafkaApisTest extends Logging {
             .setErrorMessage(null)
             .setStateEpoch(1)
             .setStartOffset(10)
+            .setDeliveryCompleteCount(0)
         ))
     )
 
diff --git a/server-common/src/main/java/org/apache/kafka/server/share/persister/DefaultStatePersister.java b/server-common/src/main/java/org/apache/kafka/server/share/persister/DefaultStatePersister.java
index 776c4f73bdf71..4d593a3bd98fc 100644
--- a/server-common/src/main/java/org/apache/kafka/server/share/persister/DefaultStatePersister.java
+++ b/server-common/src/main/java/org/apache/kafka/server/share/persister/DefaultStatePersister.java
@@ -490,6 +490,7 @@ ReadShareGroupStateSummaryResult readSummaryResponsesToResult(
                                     partitionResult.partition(),
                                     partitionResult.stateEpoch(),
                                     partitionResult.startOffset(),
+                                    partitionResult.deliveryCompleteCount(),
                                     partitionResult.leaderEpoch(),
                                     partitionResult.errorCode(),
                                     partitionResult.errorMessage()))
@@ -501,6 +502,7 @@ ReadShareGroupStateSummaryResult readSummaryResponsesToResult(
                                 -1,
                                 -1,
                                 -1,
+                                -1,
                                 Errors.UNKNOWN_SERVER_ERROR.code(),   // No specific public error code exists for InterruptedException / ExecutionException
                                 "Error reading state from share coordinator: " + e.getMessage()));
                         }
diff --git a/server-common/src/main/java/org/apache/kafka/server/share/persister/NoOpStatePersister.java b/server-common/src/main/java/org/apache/kafka/server/share/persister/NoOpStatePersister.java
index 908891dd463bc..270d1fabfa3e2 100644
--- a/server-common/src/main/java/org/apache/kafka/server/share/persister/NoOpStatePersister.java
+++ b/server-common/src/main/java/org/apache/kafka/server/share/persister/NoOpStatePersister.java
@@ -93,7 +93,8 @@ public CompletableFuture<ReadShareGroupStateSummaryResult> readSummary(ReadShare
             resultArgs.add(new TopicData<>(topicData.topicId(), topicData.partitions().stream().
                 map(partitionIdData -> PartitionFactory.newPartitionStateSummaryData(
                     partitionIdData.partition(), PartitionFactory.DEFAULT_STATE_EPOCH, PartitionFactory.UNINITIALIZED_START_OFFSET,
-                    PartitionFactory.DEFAULT_LEADER_EPOCH, PartitionFactory.DEFAULT_ERROR_CODE, PartitionFactory.DEFAULT_ERR_MESSAGE))
+                    PartitionFactory.UNINITIALIZED_DELIVERY_COMPLETE_COUNT, PartitionFactory.DEFAULT_LEADER_EPOCH,
+                    PartitionFactory.DEFAULT_ERROR_CODE, PartitionFactory.DEFAULT_ERR_MESSAGE))
                 .collect(Collectors.toList())));
         }
         return CompletableFuture.completedFuture(new ReadShareGroupStateSummaryResult.Builder().setTopicsData(resultArgs).build());
diff --git a/server-common/src/main/java/org/apache/kafka/server/share/persister/PartitionFactory.java b/server-common/src/main/java/org/apache/kafka/server/share/persister/PartitionFactory.java
index f0612677fc904..ed998bb0b1f30 100644
--- a/server-common/src/main/java/org/apache/kafka/server/share/persister/PartitionFactory.java
+++ b/server-common/src/main/java/org/apache/kafka/server/share/persister/PartitionFactory.java
@@ -48,8 +48,8 @@ public static PartitionErrorData newPartitionErrorData(int partition, short erro
         return new PartitionData(partition, DEFAULT_STATE_EPOCH, UNINITIALIZED_START_OFFSET, UNINITIALIZED_DELIVERY_COMPLETE_COUNT, errorCode, errorMessage, DEFAULT_LEADER_EPOCH, null);
     }
 
-    public static PartitionStateSummaryData newPartitionStateSummaryData(int partition, int stateEpoch, long startOffset, int leaderEpoch, short errorCode, String errorMessage) {
-        return new PartitionData(partition, stateEpoch, startOffset, UNINITIALIZED_DELIVERY_COMPLETE_COUNT, errorCode, errorMessage, leaderEpoch, null);
+    public static PartitionStateSummaryData newPartitionStateSummaryData(int partition, int stateEpoch, long startOffset, int deliveryCompleteCount, int leaderEpoch, short errorCode, String errorMessage) {
+        return new PartitionData(partition, stateEpoch, startOffset, deliveryCompleteCount, errorCode, errorMessage, leaderEpoch, null);
     }
 
     public static PartitionStateBatchData newPartitionStateBatchData(int partition, int stateEpoch, long startOffset, int deliveryCompleteCount, int leaderEpoch, List<PersisterStateBatch> stateBatches) {
diff --git a/server-common/src/main/java/org/apache/kafka/server/share/persister/PartitionStateSummaryData.java b/server-common/src/main/java/org/apache/kafka/server/share/persister/PartitionStateSummaryData.java
index 58a9dc1061520..7cc8ed2cae167 100644
--- a/server-common/src/main/java/org/apache/kafka/server/share/persister/PartitionStateSummaryData.java
+++ b/server-common/src/main/java/org/apache/kafka/server/share/persister/PartitionStateSummaryData.java
@@ -28,6 +28,8 @@ public interface PartitionStateSummaryData extends PartitionInfoData, PartitionI
 
     long startOffset();
 
+    int deliveryCompleteCount();
+
     short errorCode();
 
     String errorMessage();
diff --git a/server-common/src/main/java/org/apache/kafka/server/share/persister/ReadShareGroupStateSummaryResult.java b/server-common/src/main/java/org/apache/kafka/server/share/persister/ReadShareGroupStateSummaryResult.java
index 249eb20ed94aa..81a1d200c9d48 100644
--- a/server-common/src/main/java/org/apache/kafka/server/share/persister/ReadShareGroupStateSummaryResult.java
+++ b/server-common/src/main/java/org/apache/kafka/server/share/persister/ReadShareGroupStateSummaryResult.java
@@ -39,7 +39,8 @@ public static ReadShareGroupStateSummaryResult from(ReadShareGroupStateSummaryRe
                                 readStateSummaryResult.partitions().stream()
                                         .map(partitionResult -> PartitionFactory.newPartitionStateSummaryData(
                                                 partitionResult.partition(), partitionResult.stateEpoch(), partitionResult.startOffset(),
-                                                partitionResult.leaderEpoch(), partitionResult.errorCode(), partitionResult.errorMessage()))
+                                                partitionResult.deliveryCompleteCount(), partitionResult.leaderEpoch(), partitionResult.errorCode(),
+                                                partitionResult.errorMessage()))
                                         .collect(Collectors.toList())))
                         .collect(Collectors.toList()))
                 .build();
diff --git a/server-common/src/test/java/org/apache/kafka/server/share/persister/DefaultStatePersisterTest.java b/server-common/src/test/java/org/apache/kafka/server/share/persister/DefaultStatePersisterTest.java
index 9dc1b7886ed96..51a617c43db63 100644
--- a/server-common/src/test/java/org/apache/kafka/server/share/persister/DefaultStatePersisterTest.java
+++ b/server-common/src/test/java/org/apache/kafka/server/share/persister/DefaultStatePersisterTest.java
@@ -869,7 +869,7 @@ public void testReadStateSummarySuccess() {
 
                 return requestGroupId.equals(groupId) && requestTopicId == topicId1 && requestPartition == partition1;
             },
-            new ReadShareGroupStateSummaryResponse(ReadShareGroupStateSummaryResponse.toResponseData(topicId1, partition1, 0, 1, 1)),
+            new ReadShareGroupStateSummaryResponse(ReadShareGroupStateSummaryResponse.toResponseData(topicId1, partition1, 0, 0, 1, 1)),
             coordinatorNode1);
 
         client.prepareResponseFrom(
@@ -881,7 +881,7 @@ public void testReadStateSummarySuccess() {
 
                 return requestGroupId.equals(groupId) && requestTopicId == topicId2 && requestPartition == partition2;
             },
-            new ReadShareGroupStateSummaryResponse(ReadShareGroupStateSummaryResponse.toResponseData(topicId2, partition2, 0, 1, 1)),
+            new ReadShareGroupStateSummaryResponse(ReadShareGroupStateSummaryResponse.toResponseData(topicId2, partition2, 0, 0, 1, 1)),
             coordinatorNode2);
 
         ShareCoordinatorMetadataCacheHelper cacheHelper = getDefaultCacheHelper(suppliedNode);
@@ -931,12 +931,12 @@ public void testReadStateSummarySuccess() {
 
         HashSet<PartitionData> expectedResultMap = new HashSet<>();
         expectedResultMap.add(
-            (PartitionData) PartitionFactory.newPartitionStateSummaryData(partition1, 1, 0, 1, Errors.NONE.code(),
+            (PartitionData) PartitionFactory.newPartitionStateSummaryData(partition1, 1, 0, 0, 1, Errors.NONE.code(),
                 null
             ));
 
         expectedResultMap.add(
-            (PartitionData) PartitionFactory.newPartitionStateSummaryData(partition2, 1, 0, 1, Errors.NONE.code(),
+            (PartitionData) PartitionFactory.newPartitionStateSummaryData(partition2, 1, 0, 0, 1, Errors.NONE.code(),
                 null
             ));
 
@@ -1438,6 +1438,7 @@ public void testReadStateSummaryResponseToResultPartialResults() {
                             tp1.topicId(),
                             tp1.partition(),
                             1L,
+                            0,
                             1,
                             2
                         )
@@ -1470,7 +1471,7 @@ public void testReadStateSummaryResponseToResultPartialResults() {
             results.topicsData().contains(
                 new TopicData<>(
                     tp1.topicId(),
-                    List.of(PartitionFactory.newPartitionStateSummaryData(tp1.partition(), 2, 1L, 1, Errors.NONE.code(), null))
+                    List.of(PartitionFactory.newPartitionStateSummaryData(tp1.partition(), 2, 1L, 0, 1, Errors.NONE.code(), null))
                 )
             )
         );
@@ -1478,7 +1479,7 @@ public void testReadStateSummaryResponseToResultPartialResults() {
             results.topicsData().contains(
                 new TopicData<>(
                     tp2.topicId(),
-                    List.of(PartitionFactory.newPartitionStateSummaryData(tp2.partition(), 0, 0, 0, Errors.UNKNOWN_TOPIC_OR_PARTITION.code(), "unknown tp"))
+                    List.of(PartitionFactory.newPartitionStateSummaryData(tp2.partition(), 0, 0, -1, 0, Errors.UNKNOWN_TOPIC_OR_PARTITION.code(), "unknown tp"))
                 )
             )
         );
@@ -1498,6 +1499,7 @@ public void testReadStateSummaryResponseToResultFailedFuture() {
                             tp1.topicId(),
                             tp1.partition(),
                             1L,
+                            0,
                             1,
                             2
                         )
@@ -1520,7 +1522,7 @@ public void testReadStateSummaryResponseToResultFailedFuture() {
             results.topicsData().contains(
                 new TopicData<>(
                     tp1.topicId(),
-                    List.of(PartitionFactory.newPartitionStateSummaryData(tp1.partition(), 2, 1L, 1, Errors.NONE.code(), null))
+                    List.of(PartitionFactory.newPartitionStateSummaryData(tp1.partition(), 2, 1L, 0, 1, Errors.NONE.code(), null))
                 )
             )
         );
@@ -1528,7 +1530,7 @@ public void testReadStateSummaryResponseToResultFailedFuture() {
             results.topicsData().contains(
                 new TopicData<>(
                     tp2.topicId(),
-                    List.of(PartitionFactory.newPartitionStateSummaryData(tp2.partition(), -1, -1L, -1, Errors.UNKNOWN_SERVER_ERROR.code(), "Error reading state from share coordinator: java.lang.Exception: scary stuff"))
+                    List.of(PartitionFactory.newPartitionStateSummaryData(tp2.partition(), -1, -1L, -1, -1, Errors.UNKNOWN_SERVER_ERROR.code(), "Error reading state from share coordinator: java.lang.Exception: scary stuff"))
                 )
             )
         );
diff --git a/share-coordinator/src/main/java/org/apache/kafka/coordinator/share/ShareCoordinatorShard.java b/share-coordinator/src/main/java/org/apache/kafka/coordinator/share/ShareCoordinatorShard.java
index db8819425d645..aa098090aef89 100644
--- a/share-coordinator/src/main/java/org/apache/kafka/coordinator/share/ShareCoordinatorShard.java
+++ b/share-coordinator/src/main/java/org/apache/kafka/coordinator/share/ShareCoordinatorShard.java
@@ -445,6 +445,7 @@ public CoordinatorResult<ReadShareGroupStateSummaryResponseData, CoordinatorReco
                 topicId,
                 partitionId,
                 PartitionFactory.UNINITIALIZED_START_OFFSET,
+                PartitionFactory.UNINITIALIZED_DELIVERY_COMPLETE_COUNT,
                 PartitionFactory.DEFAULT_LEADER_EPOCH,
                 PartitionFactory.DEFAULT_STATE_EPOCH
             );
@@ -463,6 +464,7 @@ public CoordinatorResult<ReadShareGroupStateSummaryResponseData, CoordinatorReco
                     topicId,
                     partitionId,
                     offsetValue.startOffset(),
+                    offsetValue.deliveryCompleteCount(),
                     offsetValue.leaderEpoch(),
                     offsetValue.stateEpoch()
                 );
diff --git a/share-coordinator/src/test/java/org/apache/kafka/coordinator/share/ShareCoordinatorShardTest.java b/share-coordinator/src/test/java/org/apache/kafka/coordinator/share/ShareCoordinatorShardTest.java
index f82843f2de55c..aab870e4d8a9e 100644
--- a/share-coordinator/src/test/java/org/apache/kafka/coordinator/share/ShareCoordinatorShardTest.java
+++ b/share-coordinator/src/test/java/org/apache/kafka/coordinator/share/ShareCoordinatorShardTest.java
@@ -169,6 +169,7 @@ private void writeAndReplayRecord(ShareCoordinatorShard shard, int leaderEpoch)
                 .setPartitions(List.of(new WriteShareGroupStateRequestData.PartitionData()
                     .setPartition(PARTITION)
                     .setStartOffset(0)
+                    .setDeliveryCompleteCount(0)
                     .setStateEpoch(0)
                     .setLeaderEpoch(leaderEpoch)
                     .setStateBatches(List.of(new WriteShareGroupStateRequestData.StateBatch()
@@ -613,6 +614,7 @@ public void testReadStateSummarySuccess() {
             PARTITION,
             0,
             0,
+            0,
             0
         ), result.response());