diff --git a/src/java.instrument/share/classes/java/lang/instrument/IllegalClassFormatException.java b/src/java.instrument/share/classes/java/lang/instrument/IllegalClassFormatException.java
index 7e14665b198..59bde2f6c1f 100644
--- a/src/java.instrument/share/classes/java/lang/instrument/IllegalClassFormatException.java
+++ b/src/java.instrument/share/classes/java/lang/instrument/IllegalClassFormatException.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2008, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,6 +25,8 @@
 
 package java.lang.instrument;
 
+import java.io.Serial;
+
 /*
  * Copyright 2003 Wily Technology, Inc.
  */
@@ -40,6 +42,8 @@ package java.lang.instrument;
  * @since   1.5
  */
 public class IllegalClassFormatException extends Exception {
+
+    @Serial
     private static final long serialVersionUID = -3841736710924794009L;
 
     /**
diff --git a/src/java.instrument/share/classes/java/lang/instrument/UnmodifiableClassException.java b/src/java.instrument/share/classes/java/lang/instrument/UnmodifiableClassException.java
index d6aac1d5b4b..40bae4b5c91 100644
--- a/src/java.instrument/share/classes/java/lang/instrument/UnmodifiableClassException.java
+++ b/src/java.instrument/share/classes/java/lang/instrument/UnmodifiableClassException.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2004, 2008, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2004, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,6 +25,8 @@
 
 package java.lang.instrument;
 
+import java.io.Serial;
+
 /**
  * Thrown by an implementation of
  * {@link java.lang.instrument.Instrumentation#redefineClasses Instrumentation.redefineClasses}
@@ -34,6 +36,8 @@ package java.lang.instrument;
  * @since   1.5
  */
 public class UnmodifiableClassException extends Exception {
+
+    @Serial
     private static final long serialVersionUID = 1716652643585309178L;
 
     /**
diff --git a/src/java.instrument/share/classes/java/lang/instrument/UnmodifiableModuleException.java b/src/java.instrument/share/classes/java/lang/instrument/UnmodifiableModuleException.java
index 462ee8b71ff..f97294a01c1 100644
--- a/src/java.instrument/share/classes/java/lang/instrument/UnmodifiableModuleException.java
+++ b/src/java.instrument/share/classes/java/lang/instrument/UnmodifiableModuleException.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,14 +25,17 @@
 
 package java.lang.instrument;
 
+import java.io.Serial;
+
 /**
  * Thrown to indicate that a module cannot be modified.
  *
  * @see Instrumentation#redefineModule
  * @since 9
  */
-
 public class UnmodifiableModuleException extends RuntimeException {
+
+    @Serial
     private static final long serialVersionUID = 6912511912351080644L;
 
     /**