diff --git a/src/aria/combobox/combobox.spec.ts b/src/aria/combobox/combobox.spec.ts
index 247cb8d1331d..5314c4a10cd6 100644
--- a/src/aria/combobox/combobox.spec.ts
+++ b/src/aria/combobox/combobox.spec.ts
@@ -33,7 +33,7 @@ describe('Combobox', () => {
 
     const click = (element: HTMLElement, eventInit?: PointerEventInit) => {
       focus();
-      element.dispatchEvent(new PointerEvent('pointerup', {bubbles: true, ...eventInit}));
+      element.dispatchEvent(new PointerEvent('click', {bubbles: true, ...eventInit}));
       fixture.detectChanges();
     };
 
@@ -584,7 +584,7 @@ describe('Combobox', () => {
 
     const click = (element: HTMLElement, eventInit?: PointerEventInit) => {
       focus();
-      element.dispatchEvent(new PointerEvent('pointerup', {bubbles: true, ...eventInit}));
+      element.dispatchEvent(new PointerEvent('click', {bubbles: true, ...eventInit}));
       fixture.detectChanges();
     };
 
diff --git a/src/aria/combobox/combobox.ts b/src/aria/combobox/combobox.ts
index 9dc3aa33abe3..49ce65cabf96 100644
--- a/src/aria/combobox/combobox.ts
+++ b/src/aria/combobox/combobox.ts
@@ -74,7 +74,7 @@ import {toSignal} from '@angular/core/rxjs-interop';
     '[attr.data-expanded]': 'expanded()',
     '(input)': '_pattern.onInput($event)',
     '(keydown)': '_pattern.onKeydown($event)',
-    '(pointerup)': '_pattern.onPointerup($event)',
+    '(click)': '_pattern.onClick($event)',
     '(focusin)': '_pattern.onFocusIn()',
     '(focusout)': '_pattern.onFocusOut($event)',
   },
diff --git a/src/aria/private/combobox/combobox.spec.ts b/src/aria/private/combobox/combobox.spec.ts
index 5c8cb0f31cda..2922a50e61fc 100644
--- a/src/aria/private/combobox/combobox.spec.ts
+++ b/src/aria/private/combobox/combobox.spec.ts
@@ -352,7 +352,7 @@ describe('Combobox with Listbox Pattern', () => {
     it('should not expand when disabled', () => {
       const {combobox, inputEl} = getPatterns({disabled: true});
       expect(combobox.expanded()).toBe(false);
-      combobox.onPointerup(clickInput(inputEl));
+      combobox.onClick(clickInput(inputEl));
       expect(combobox.expanded()).toBe(false);
     });
   });
@@ -376,7 +376,7 @@ describe('Combobox with Listbox Pattern', () => {
       });
 
       it('should select and commit on click', () => {
-        combobox.onPointerup(clickOption(listbox.inputs.items(), 0));
+        combobox.onClick(clickOption(listbox.inputs.items(), 0));
         expect(listbox.getSelectedItems()[0]).toBe(listbox.inputs.items()[0]);
         expect(listbox.inputs.values()).toEqual(['Apple']);
         expect(inputEl.value).toBe('Apple');
@@ -437,7 +437,7 @@ describe('Combobox with Listbox Pattern', () => {
       });
 
       it('should select and commit on click', () => {
-        combobox.onPointerup(clickOption(listbox.inputs.items(), 3));
+        combobox.onClick(clickOption(listbox.inputs.items(), 3));
         expect(listbox.getSelectedItems()[0]).toBe(listbox.inputs.items()[3]);
         expect(listbox.inputs.values()).toEqual(['Blackberry']);
         expect(inputEl.value).toBe('Blackberry');
@@ -498,7 +498,7 @@ describe('Combobox with Listbox Pattern', () => {
       });
 
       it('should select and commit on click', () => {
-        combobox.onPointerup(clickOption(listbox.inputs.items(), 3));
+        combobox.onClick(clickOption(listbox.inputs.items(), 3));
         expect(listbox.getSelectedItems()[0]).toBe(listbox.inputs.items()[3]);
         expect(listbox.inputs.values()).toEqual(['Blackberry']);
         expect(inputEl.value).toBe('Blackberry');
@@ -585,7 +585,7 @@ describe('Combobox with Listbox Pattern', () => {
     describe('with single-select', () => {
       it('should select and close on selection', () => {
         const {combobox, listbox, inputEl} = getPatterns({readonly: true});
-        combobox.onPointerup(clickOption(listbox.inputs.items(), 2));
+        combobox.onClick(clickOption(listbox.inputs.items(), 2));
         expect(listbox.getSelectedItems()[0]).toBe(listbox.inputs.items()[2]);
         expect(listbox.inputs.values()).toEqual(['Banana']);
         expect(inputEl.value).toBe('Banana');
@@ -606,8 +606,8 @@ describe('Combobox with Listbox Pattern', () => {
         const {combobox, listbox, inputEl} = getPatterns({readonly: true});
         (listbox.inputs.multi as WritableSignal<boolean>).set(true);
 
-        combobox.onPointerup(clickOption(listbox.inputs.items(), 1));
-        combobox.onPointerup(clickOption(listbox.inputs.items(), 2));
+        combobox.onClick(clickOption(listbox.inputs.items(), 1));
+        combobox.onClick(clickOption(listbox.inputs.items(), 2));
 
         expect(listbox.inputs.values()).toEqual(['Apricot', 'Banana']);
         expect(inputEl.value).toBe('Apricot, Banana');
@@ -741,7 +741,7 @@ describe('Combobox with Tree Pattern', () => {
       });
 
       it('should select and commit on click', () => {
-        combobox.onPointerup(clickTreeItem(tree.inputs.allItems(), 0));
+        combobox.onClick(clickTreeItem(tree.inputs.allItems(), 0));
         expect(tree.inputs.values()).toEqual(['Fruit']);
         expect(inputEl.value).toBe('Fruit');
       });
@@ -755,7 +755,7 @@ describe('Combobox with Tree Pattern', () => {
       });
 
       it('should select on focusout if the input text exactly matches an item', () => {
-        combobox.onPointerup(clickInput(inputEl));
+        combobox.onClick(clickInput(inputEl));
         type('Apple');
         combobox.onFocusOut(new FocusEvent('focusout'));
         expect(tree.inputs.values()).toEqual(['Apple']);
@@ -801,7 +801,7 @@ describe('Combobox with Tree Pattern', () => {
       });
 
       it('should select and commit on click', () => {
-        combobox.onPointerup(clickTreeItem(tree.inputs.allItems(), 2));
+        combobox.onClick(clickTreeItem(tree.inputs.allItems(), 2));
         expect(tree.getSelectedItems()[0]).toBe(tree.inputs.allItems()[2]);
         expect(tree.inputs.values()).toEqual(['Banana']);
         expect(inputEl.value).toBe('Banana');
@@ -858,7 +858,7 @@ describe('Combobox with Tree Pattern', () => {
       });
 
       it('should select and commit on click', () => {
-        combobox.onPointerup(clickTreeItem(tree.inputs.allItems(), 2));
+        combobox.onClick(clickTreeItem(tree.inputs.allItems(), 2));
         expect(tree.getSelectedItems()[0]).toBe(tree.inputs.allItems()[2]);
         expect(tree.inputs.values()).toEqual(['Banana']);
         expect(inputEl.value).toBe('Banana');
@@ -928,9 +928,9 @@ describe('Combobox with Tree Pattern', () => {
   describe('Readonly mode', () => {
     it('should select and close on selection', () => {
       const {combobox, tree, inputEl} = getPatterns({readonly: true});
-      combobox.onPointerup(clickInput(inputEl));
+      combobox.onClick(clickInput(inputEl));
       expect(combobox.expanded()).toBe(true);
-      combobox.onPointerup(clickTreeItem(tree.inputs.allItems(), 0));
+      combobox.onClick(clickTreeItem(tree.inputs.allItems(), 0));
       expect(tree.inputs.values()).toEqual(['Fruit']);
       expect(inputEl.value).toBe('Fruit');
       expect(combobox.expanded()).toBe(false);
diff --git a/src/aria/private/combobox/combobox.ts b/src/aria/private/combobox/combobox.ts
index 954beaba13d5..e9a53ad84bd5 100644
--- a/src/aria/private/combobox/combobox.ts
+++ b/src/aria/private/combobox/combobox.ts
@@ -282,8 +282,8 @@ export class ComboboxPattern<T extends ListItem<V>, V> {
     return manager;
   });
 
-  /** The pointerup event manager for the combobox. */
-  pointerup = computed(() =>
+  /** The click event manager for the combobox. */
+  click = computed(() =>
     new PointerEventManager().on(e => {
       if (e.target === this.inputs.inputEl()) {
         if (this.readonly()) {
@@ -325,10 +325,10 @@ export class ComboboxPattern<T extends ListItem<V>, V> {
     }
   }
 
-  /** Handles pointerup events for the combobox. */
-  onPointerup(event: PointerEvent) {
+  /** Handles click events for the combobox. */
+  onClick(event: MouseEvent) {
     if (!this.inputs.disabled()) {
-      this.pointerup().handle(event);
+      this.click().handle(event as PointerEvent);
     }
   }
 
@@ -510,6 +510,12 @@ export class ComboboxPattern<T extends ListItem<V>, V> {
       return;
     }
 
+    if (this.readonly()) {
+      this.expanded.set(false);
+      popupControls?.unfocus();
+      return;
+    }
+
     if (!opts?.reset) {
       if (this.inputs.filterMode() === 'manual') {
         if (