diff --git a/modules/swift-syntax/509.0.0/MODULE.bazel b/modules/swift-syntax/509.0.0/MODULE.bazel
new file mode 100644
index 00000000000..c33b107b9a1
--- /dev/null
+++ b/modules/swift-syntax/509.0.0/MODULE.bazel
@@ -0,0 +1,7 @@
+module(
+    name = "swift-syntax",
+    version = "509.0.0",
+    compatibility_level = 1,
+)
+
+bazel_dep(name = "rules_swift", version = "1.5.1", repo_name = "build_bazel_rules_swift")
diff --git a/modules/swift-syntax/509.0.0/patches/module_dot_bazel.patch b/modules/swift-syntax/509.0.0/patches/module_dot_bazel.patch
new file mode 100644
index 00000000000..d3d9e117156
--- /dev/null
+++ b/modules/swift-syntax/509.0.0/patches/module_dot_bazel.patch
@@ -0,0 +1,5 @@
+--- MODULE.bazel
++++ MODULE.bazel
+@@ -3 +3 @@ module(
+-    version = "0",  # Update on release/* branches
++    version = "509.0.0",
diff --git a/modules/swift-syntax/509.0.0/presubmit.yml b/modules/swift-syntax/509.0.0/presubmit.yml
new file mode 100644
index 00000000000..33cb979c22f
--- /dev/null
+++ b/modules/swift-syntax/509.0.0/presubmit.yml
@@ -0,0 +1,8 @@
+tasks:
+  verify_targets:
+    name: Verify build targets
+    platform: macos
+    build_targets:
+      - '@swift-syntax//:SwiftSyntax'
+    build_flags:
+      - --macos_minimum_os=12.0
diff --git a/modules/swift-syntax/509.0.0/source.json b/modules/swift-syntax/509.0.0/source.json
new file mode 100644
index 00000000000..c5553dc5b38
--- /dev/null
+++ b/modules/swift-syntax/509.0.0/source.json
@@ -0,0 +1,9 @@
+{
+    "url": "https://github.com/apple/swift-syntax/archive/refs/tags/509.0.0.tar.gz",
+    "integrity": "sha256-HN3an30klhLj111Mqo/ZU0wGIbiokKfXUkpGibzmRPE=",
+    "strip_prefix": "swift-syntax-509.0.0",
+    "patches": {
+        "module_dot_bazel.patch": "sha256-FOmA4CitYq/ZSiiDDPOb3m03mSQwlVCpNQfWfjRcv/U="
+    },
+    "patch_strip": 0
+}
diff --git a/modules/swift-syntax/metadata.json b/modules/swift-syntax/metadata.json
new file mode 100644
index 00000000000..9eb8f280feb
--- /dev/null
+++ b/modules/swift-syntax/metadata.json
@@ -0,0 +1,17 @@
+{
+    "homepage": "https://github.com/apple/swift-syntax",
+    "maintainers": [
+        {
+            "email": "keithbsmiley@gmail.com",
+            "github": "keith",
+            "name": "Keith Smiley"
+        }
+    ],
+    "repository": [
+        "github:apple/swift-syntax"
+    ],
+    "versions": [
+        "509.0.0"
+    ],
+    "yanked_versions": {}
+}