diff --git a/shell/browser/native_window_views.cc b/shell/browser/native_window_views.cc
index d7d4a9bd827f5..0ba1637fe069a 100644
--- a/shell/browser/native_window_views.cc
+++ b/shell/browser/native_window_views.cc
@@ -594,6 +594,7 @@ void NativeWindowViews::Unmaximize() {
 #if defined(OS_WIN)
     if (transparent()) {
       SetBounds(restore_bounds_, false);
+      NotifyWindowUnmaximize();
       return;
     }
 #endif
diff --git a/shell/browser/native_window_views_win.cc b/shell/browser/native_window_views_win.cc
index 05335aed07d66..cf4eb4855f4c2 100644
--- a/shell/browser/native_window_views_win.cc
+++ b/shell/browser/native_window_views_win.cc
@@ -187,6 +187,7 @@ void NativeWindowViews::Maximize() {
     auto display = display::Screen::GetScreen()->GetDisplayNearestWindow(
         GetNativeWindow());
     SetBounds(display.work_area(), false);
+    NotifyWindowMaximize();
   }
 }
 
diff --git a/spec-main/api-browser-window-spec.ts b/spec-main/api-browser-window-spec.ts
index 30dced06784de..b1613fea6dce2 100644
--- a/spec-main/api-browser-window-spec.ts
+++ b/spec-main/api-browser-window-spec.ts
@@ -1119,7 +1119,7 @@ describe('BrowserWindow module', () => {
           await unmaximize;
           expectBoundsEqual(w.getNormalBounds(), bounds);
         });
-        it('can check transparent window maximization', async () => {
+        it('correctly checks transparent window maximization state', async () => {
           w.destroy();
           w = new BrowserWindow({
             show: false,
@@ -1128,12 +1128,12 @@ describe('BrowserWindow module', () => {
             transparent: true
           });
 
-          const maximize = emittedOnce(w, 'resize');
+          const maximize = emittedOnce(w, 'maximize');
           w.show();
           w.maximize();
           await maximize;
           expect(w.isMaximized()).to.equal(true);
-          const unmaximize = emittedOnce(w, 'resize');
+          const unmaximize = emittedOnce(w, 'unmaximize');
           w.unmaximize();
           await unmaximize;
           expect(w.isMaximized()).to.equal(false);
@@ -3266,6 +3266,19 @@ describe('BrowserWindow module', () => {
       await maximize;
     });
 
+    it('emits an event when a transparent window is maximized', async () => {
+      const w = new BrowserWindow({
+        show: false,
+        frame: false,
+        transparent: true
+      });
+
+      const maximize = emittedOnce(w, 'maximize');
+      w.show();
+      w.maximize();
+      await maximize;
+    });
+
     it('emits only one event when frameless window is maximized', () => {
       const w = new BrowserWindow({ show: false, frame: false });
       let emitted = 0;
@@ -3284,6 +3297,22 @@ describe('BrowserWindow module', () => {
       await unmaximize;
     });
 
+    it('emits an event when a transparent window is unmaximized', async () => {
+      const w = new BrowserWindow({
+        show: false,
+        frame: false,
+        transparent: true
+      });
+
+      const maximize = emittedOnce(w, 'maximize');
+      const unmaximize = emittedOnce(w, 'unmaximize');
+      w.show();
+      w.maximize();
+      await maximize;
+      w.unmaximize();
+      await unmaximize;
+    });
+
     it('emits an event when window is minimized', async () => {
       const w = new BrowserWindow({ show: false });
       const minimize = emittedOnce(w, 'minimize');