diff --git a/antora-playbook.yml b/antora-playbook.yml
index 457b55e00..62363b8fd 100644
--- a/antora-playbook.yml
+++ b/antora-playbook.yml
@@ -36,6 +36,7 @@ content:
     - url: .
       branches:
         - HEAD
+        - release-26.3
         - release-25.11
         - release-25.7
         - release/25.3
@@ -55,6 +56,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -70,6 +72,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -84,6 +87,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -98,6 +102,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -113,6 +118,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -127,6 +133,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -141,6 +148,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -155,6 +163,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -169,6 +178,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -183,6 +193,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -197,6 +208,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -211,6 +223,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -225,11 +238,13 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
     - url: https://github.com/stackabletech/spark-k8s-operator.git
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -244,6 +259,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -258,6 +274,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -272,6 +289,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
diff --git a/local-antora-playbook.yml b/local-antora-playbook.yml
index b0fefa006..f41c4f9f0 100644
--- a/local-antora-playbook.yml
+++ b/local-antora-playbook.yml
@@ -21,6 +21,7 @@ content:
     - url: ./
       branches:
         - HEAD
+        - release-26.3
         - release-25.11
         - release-25.7
         - release/25.3
@@ -40,6 +41,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -55,6 +57,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -69,6 +72,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -83,6 +87,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -98,6 +103,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -112,6 +118,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -126,6 +133,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -140,6 +148,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -154,6 +163,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -168,6 +178,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -182,6 +193,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -196,6 +208,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -210,11 +223,13 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
     - url: https://github.com/stackabletech/spark-k8s-operator.git
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -229,6 +244,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -243,6 +259,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3
@@ -257,6 +274,7 @@ content:
       start_path: docs
       branches:
         - main
+        - release-26.3
         - release-25.11
         - release-25.7
         - release-25.3