diff --git a/java/src/org/openqa/selenium/interactions/Encodable.java b/java/src/org/openqa/selenium/interactions/Encodable.java
index f213dd67049f2..5e05325cca4b8 100644
--- a/java/src/org/openqa/selenium/interactions/Encodable.java
+++ b/java/src/org/openqa/selenium/interactions/Encodable.java
@@ -18,12 +18,14 @@
 package org.openqa.selenium.interactions;
 
 import java.util.Map;
+import org.jspecify.annotations.NullMarked;
 
 /**
  * This interface allows a custom {@link Interaction} to be JSON encoded for the W3C wire format. It
  * should not normally be exposed or used by user-facing APIs. Instead, these should traffic in the
  * {@link Interaction} interface.
  */
+@NullMarked
 public interface Encodable {
   Map<String, Object> encode();
 }
diff --git a/java/src/org/openqa/selenium/interactions/InputSource.java b/java/src/org/openqa/selenium/interactions/InputSource.java
index a8187d1db422f..c7c9060e82c73 100644
--- a/java/src/org/openqa/selenium/interactions/InputSource.java
+++ b/java/src/org/openqa/selenium/interactions/InputSource.java
@@ -17,10 +17,13 @@
 
 package org.openqa.selenium.interactions;
 
+import org.jspecify.annotations.NullMarked;
+
 /**
  * Models an <a href="https://www.w3.org/TR/webdriver/#dfn-input-source">input source</a> as defined
  * and used by the W3C WebDriver spec.
  */
+@NullMarked
 public interface InputSource {
   SourceType getInputType();
 
diff --git a/java/src/org/openqa/selenium/interactions/KeyInput.java b/java/src/org/openqa/selenium/interactions/KeyInput.java
index e3b73a87d57fc..c82c5800951b3 100644
--- a/java/src/org/openqa/selenium/interactions/KeyInput.java
+++ b/java/src/org/openqa/selenium/interactions/KeyInput.java
@@ -21,15 +21,18 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.UUID;
+import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.Nullable;
 
 /**
  * Models a <a href="https://www.w3.org/TR/webdriver/#dfn-key-input-source">key input source</a>.
  */
+@NullMarked
 public class KeyInput implements InputSource, Encodable {
 
   private final String name;
 
-  public KeyInput(String name) {
+  public KeyInput(@Nullable String name) {
     this.name = Optional.ofNullable(name).orElse(UUID.randomUUID().toString());
   }
 
diff --git a/java/src/org/openqa/selenium/interactions/PointerInput.java b/java/src/org/openqa/selenium/interactions/PointerInput.java
index 7aeb708992cd6..d2343e352290e 100644
--- a/java/src/org/openqa/selenium/interactions/PointerInput.java
+++ b/java/src/org/openqa/selenium/interactions/PointerInput.java
@@ -24,6 +24,8 @@
 import java.util.Map;
 import java.util.Optional;
 import java.util.UUID;
+import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.Nullable;
 import org.openqa.selenium.Point;
 import org.openqa.selenium.WebElement;
 import org.openqa.selenium.WrapsElement;
@@ -33,12 +35,13 @@
  * Models a <a href="https://www.w3.org/TR/webdriver/#dfn-pointer-input-source">pointer input
  * source</a>.
  */
+@NullMarked
 public class PointerInput implements InputSource, Encodable {
 
   private final Kind kind;
   private final String name;
 
-  public PointerInput(Kind kind, String name) {
+  public PointerInput(Kind kind, @Nullable String name) {
     this.kind = Require.nonNull("Kind of pointer device", kind);
     this.name = Optional.ofNullable(name).orElse(UUID.randomUUID().toString());
   }
@@ -283,15 +286,15 @@ public static PointerEventProperties eventProperties() {
   }
 
   public static class PointerEventProperties implements Encodable {
-    private Float width = null;
-    private Float height = null;
-    private Float pressure = null;
-    private Float tangentialPressure = null;
-    private Integer tiltX = null;
-    private Integer tiltY = null;
-    private Integer twist = null;
-    private Float altitudeAngle = null;
-    private Float azimuthAngle = null;
+    private @Nullable Float width = null;
+    private @Nullable Float height = null;
+    private @Nullable Float pressure = null;
+    private @Nullable Float tangentialPressure = null;
+    private @Nullable Integer tiltX = null;
+    private @Nullable Integer tiltY = null;
+    private @Nullable Integer twist = null;
+    private @Nullable Float altitudeAngle = null;
+    private @Nullable Float azimuthAngle = null;
 
     public PointerEventProperties setWidth(float width) {
       Require.nonNull("width", width);