diff --git a/packages/react-native/ReactAndroid/proguard-rules.pro b/packages/react-native/ReactAndroid/proguard-rules.pro
index 7e6c92af074a..0db726d9a2af 100644
--- a/packages/react-native/ReactAndroid/proguard-rules.pro
+++ b/packages/react-native/ReactAndroid/proguard-rules.pro
@@ -73,3 +73,7 @@
 -keep public class com.facebook.imageutils.** {
    public *;
 }
+
+# Activity result launcher keys include the contract's class name. Keep those names so that R8
+# doesn't merge different contracts into one class or rename them between builds.
+-keepnames class * extends androidx.activity.result.contract.ActivityResultContract
diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/activityresult/__docs__/README.md b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/activityresult/__docs__/README.md
index bdc6c9bdf046..1542339a6071 100644
--- a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/activityresult/__docs__/README.md
+++ b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/activityresult/__docs__/README.md
@@ -61,7 +61,10 @@ The same stability concern applies to minification. If the app minifies class
 names (R8/ProGuard), the obfuscated name of the owner class is not guaranteed to
 be the same from one build to the next, so a result delivered after an app
 update can be dropped. Keep the owner class's name (for example with
-`-keepnames`) if results must survive across builds.
+`-keepnames`) if results must survive across builds. React Native's consumer R8
+rules already keep the names of `ActivityResultContract` subclasses, so R8
+doesn't merge different contracts into one class, which would give them the same
+key.
 
 Registering the same contract class twice from one owner throws
 `IllegalStateException`. In that case use the overload that takes a key: