diff --git a/data/simulation/trace.shared.d.ts b/data/simulation/trace.shared.d.ts
index eb50e0adc..581942831 100644
--- a/data/simulation/trace.shared.d.ts
+++ b/data/simulation/trace.shared.d.ts
@@ -71,6 +71,7 @@ interface GeneratedEndorserBlock extends GeneratedBlockEvent {
     id: string;
     pipeline: number;
     input_blocks: BlockRef[];
+    endorser_blocks: BlockRef[];
 }
 
 interface GeneratedVote extends GeneratedBlockEvent {
diff --git a/data/simulation/trace.shared.schema.json b/data/simulation/trace.shared.schema.json
index 2dd8a0e97..18a626005 100644
--- a/data/simulation/trace.shared.schema.json
+++ b/data/simulation/trace.shared.schema.json
@@ -108,6 +108,12 @@
           },
           "type": "array"
         },
+        "endorser_blocks": {
+          "items": {
+            "$ref": "#/definitions/BlockRef"
+          },
+          "type": "array"
+        },
         "pipeline": {
           "type": "number"
         },
@@ -127,6 +133,7 @@
       "required": [
         "id",
         "input_blocks",
+        "endorser_blocks",
         "pipeline",
         "producer",
         "size_bytes",
diff --git a/leios-trace-hs/src/LeiosEvents.hs b/leios-trace-hs/src/LeiosEvents.hs
index 7f1a5a338..77788fa5a 100644
--- a/leios-trace-hs/src/LeiosEvents.hs
+++ b/leios-trace-hs/src/LeiosEvents.hs
@@ -119,6 +119,7 @@ data Event where
     , pipeline :: !PipelineNo
     , bytes :: !Word64
     , input_blocks :: ![BlockRef]
+    , endorser_blocks :: ![BlockRef]
     } ->
     Event
   RBGenerated ::
diff --git a/leios-trace-verifier/Parser.agda b/leios-trace-verifier/Parser.agda
index 38ca0a16f..5401c2972 100644
--- a/leios-trace-verifier/Parser.agda
+++ b/leios-trace-verifier/Parser.agda
@@ -86,7 +86,7 @@ data Event : Type where
   RBReceived : Maybe Node → Node → Maybe Bytes → Maybe Time → String → Maybe (List String) → Event
   IBEnteredState EBEnteredState VTBundleEnteredState RBEnteredState : String → String → Word64 → Event
   IBGenerated : String → String → SlotNo → PipelineNo → Bytes → Bytes → Maybe String → Event
-  EBGenerated : String → String → Word64 → PipelineNo → Word64 → List BlockRef → Event
+  EBGenerated : String → String → Word64 → PipelineNo → Word64 → List BlockRef → List BlockRef → Event
   RBGenerated : String → String → Word64 → Word64 → Nullable Endorsement → Maybe (List Endorsement) → Word64 → Nullable BlockRef → Event
   VTBundleGenerated : String → String → Word64 → PipelineNo → Word64 → Map String Word64 → Event
 
@@ -160,7 +160,7 @@ module _ (numberOfParties : ℕ) (sutId : ℕ) (stakeDistr : List (Pair String 
     with p ≟ SUT
   ... | yes _ = just (IB , primWord64ToNat s)
   ... | no _  = nothing
-  winningSlot record { message = EBGenerated p _ s _ _ _ }
+  winningSlot record { message = EBGenerated p _ s _ _ _ _ }
     with p ≟ SUT
   ... | yes _ = just (EB , primWord64ToNat s)
   ... | no _  = nothing
@@ -279,13 +279,13 @@ module _ (numberOfParties : ℕ) (sutId : ℕ) (stakeDistr : List (Pair String 
         actions with p ≟ SUT
         ... | yes _ = (inj₁ (IB-Role-Action (primWord64ToNat s) , SLOT)) ∷ []
         ... | no _ = []
-    traceEvent→action l record { message = EBGenerated p i s _ _ ibs } =
+    traceEvent→action l record { message = EBGenerated p i s _ _ ibs ebs } =
       let eb = record
                  { slotNumber = primWord64ToNat s
                  ; producerID = nodeId p
                  ; lotteryPf  = tt
                  ; ibRefs     = map (blockRefToNat (refs l) ∘ BlockRef.id) ibs
-                 ; ebRefs     = []
+                 ; ebRefs     = map (blockRefToNat (refs l) ∘ BlockRef.id) ebs
                  ; signature  = tt
                  }
       in record l { refs = (i , EB-Blk eb) ∷ refs l } , actions
diff --git a/leios-trace-verifier/examples/valid/agda-2.jsonl b/leios-trace-verifier/examples/valid/agda-2.jsonl
index 8790c6b43..7513f2b21 100644
--- a/leios-trace-verifier/examples/valid/agda-2.jsonl
+++ b/leios-trace-verifier/examples/valid/agda-2.jsonl
@@ -131,7 +131,7 @@
 {"message":{"slot":8,"type":"IBGenerated","producer":"node-0","id":"0-8","rb_ref":"-7674734470404649268","pipeline":0,"size_bytes":98608,"tx_payload_bytes":98304},"time_s":8.01}
 #
 # ∷ inj₁ (EB-Role-Action 8 ((3 ∷ 4 ∷ 5 ∷ []) ∷ []) , SLOT)
-{"message":{"slot":8,"type":"EBGenerated","producer":"node-0","id":"0-8","input_blocks":[],"pipeline":0,"size_bytes":1616},"time_s":8.02}
+{"message":{"slot":8,"type":"EBGenerated","producer":"node-0","id":"0-8","input_blocks":[],"endorser_blocks":[],"pipeline":0,"size_bytes":1616},"time_s":8.02}
 #
 # ∷ inj₁ (VT-Role-Action 8    , SLOT)
 {"message":{"slot":8,"type":"VTBundleGenerated","producer":"node-0","id":"0-8","votes":{},"pipeline":0,"size_bytes":105},"time_s":8.03}
diff --git a/leios-trace-verifier/hs-src/test/Spec/Transition.hs b/leios-trace-verifier/hs-src/test/Spec/Transition.hs
index 2516a1450..6fffb57de 100644
--- a/leios-trace-verifier/hs-src/test/Spec/Transition.hs
+++ b/leios-trace-verifier/hs-src/test/Spec/Transition.hs
@@ -214,6 +214,7 @@ transition GenerateEB =
     pipeline <- uses stageLength $ (slot `div`) . fromIntegral
     bytes <- lift arbitrary
     input_blocks <- lift . sublistOf =<< uses ibs (fmap BlockRef . S.toList)
+    endorser_blocks <- lift . sublistOf =<< uses ebs (fmap BlockRef . S.toList)
     pure [EBGenerated{..}]
 transition ReceiveEB =
   do
diff --git a/simulation/src/LeiosProtocol/Short/Sim.hs b/simulation/src/LeiosProtocol/Short/Sim.hs
index 3ebd5a287..6efd57392 100644
--- a/simulation/src/LeiosProtocol/Short/Sim.hs
+++ b/simulation/src/LeiosProtocol/Short/Sim.hs
@@ -355,6 +355,7 @@ sharedEvent leios nodeNames e = case e of
         Shared.EBGenerated
           { bytes = fromIntegral (messageSizeBytes eb)
           , input_blocks = map (Shared.BlockRef . T.pack . mkStringId) eb.inputBlocks
+          , endorser_blocks = map (Shared.BlockRef . T.pack . mkStringId) eb.endorseBlocksEarlierPipeline
           , pipeline = coerce $ endorseBlockPipeline leios eb
           , ..
           }