diff --git a/api/ShadowRoot.json b/api/ShadowRoot.json
index 3ace1e1e107495..3b30c8401f0971 100644
--- a/api/ShadowRoot.json
+++ b/api/ShadowRoot.json
@@ -704,6 +704,66 @@
           }
         }
       },
+      "referenceTarget": {
+        "__compat": {
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/ShadowRoot#shadowroot.referencetarget",
+          "tags": [
+            "web-features:shadow-dom"
+          ],
+          "support": {
+            "chrome": {
+              "version_added": "133",
+              "flags": [
+                {
+                  "type": "preference",
+                  "name": "#enable-experimental-web-platform-features",
+                  "value_to_set": "true"
+                }
+              ]
+            },
+            "chrome_android": "mirror",
+            "edge": "mirror",
+            "firefox": {
+              "version_added": "149",
+              "flags": [
+                {
+                  "type": "preference",
+                  "name": "dom.shadowdom.referenceTarget.enabled",
+                  "value_to_set": "true"
+                }
+              ]
+            },
+            "firefox_android": "mirror",
+            "oculus": "mirror",
+            "opera": "mirror",
+            "opera_android": "mirror",
+            "safari": {
+              "version_added": "26",
+              "flags": [
+                {
+                  "type": "preference",
+                  "name": "referenceTarget",
+                  "value_to_set": "true"
+                },
+                {
+                  "type": "preference",
+                  "name": "referenceTarget support for aria-owns",
+                  "value_to_set": "true"
+                }
+              ]
+            },
+            "safari_ios": "mirror",
+            "samsunginternet_android": "mirror",
+            "webview_android": "mirror",
+            "webview_ios": "mirror"
+          },
+          "status": {
+            "experimental": true,
+            "standard_track": false,
+            "deprecated": false
+          }
+        }
+      },
       "serializable": {
         "__compat": {
           "mdn_url": "https://developer.mozilla.org/docs/Web/API/ShadowRoot/serializable",
diff --git a/html/elements/template.json b/html/elements/template.json
index c3caa2043d59da..eea5fda89ac21a 100644
--- a/html/elements/template.json
+++ b/html/elements/template.json
@@ -149,6 +149,66 @@
             }
           }
         },
+        "shadowrootreferencetarget": {
+          "__compat": {
+            "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/template#shadowrootreferencetarget",
+            "tags": [
+              "web-features:declarative-shadow-dom"
+            ],
+            "support": {
+              "chrome": {
+                "version_added": "133",
+                "flags": [
+                  {
+                    "type": "preference",
+                    "name": "#enable-experimental-web-platform-features",
+                    "value_to_set": "true"
+                  }
+                ]
+              },
+              "chrome_android": "mirror",
+              "edge": "mirror",
+              "firefox": {
+                "version_added": "149",
+                "flags": [
+                  {
+                    "type": "preference",
+                    "name": "dom.shadowdom.referenceTarget.enabled",
+                    "value_to_set": "true"
+                  }
+                ]
+              },
+              "firefox_android": "mirror",
+              "oculus": "mirror",
+              "opera": "mirror",
+              "opera_android": "mirror",
+              "safari": {
+                "version_added": "26",
+                "flags": [
+                  {
+                    "type": "preference",
+                    "name": "referenceTarget",
+                    "value_to_set": "true"
+                  },
+                  {
+                    "type": "preference",
+                    "name": "referenceTarget support for aria-owns",
+                    "value_to_set": "true"
+                  }
+                ]
+              },
+              "safari_ios": "mirror",
+              "samsunginternet_android": "mirror",
+              "webview_android": "mirror",
+              "webview_ios": "mirror"
+            },
+            "status": {
+              "experimental": true,
+              "standard_track": false,
+              "deprecated": false
+            }
+          }
+        },
         "shadowrootserializable": {
           "__compat": {
             "mdn_url": "https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/template#shadowrootserializable",