diff --git a/app/Http/Controllers/WidgetController.php b/app/Http/Controllers/WidgetController.php
index b7705523..0ddf968c 100644
--- a/app/Http/Controllers/WidgetController.php
+++ b/app/Http/Controllers/WidgetController.php
@@ -130,10 +130,14 @@ public function activityList(Request $request): JsonResponse
         $search = $request->input('search', '');
 
         $paginator = Activity::query()
-            ->with(['causer', 'subject.user', 'subject.comments'])
+            ->with([
+                'causer',
+                'subject.user',
+                'subject.comments' => fn ($query) => $query->public(),
+            ])
             ->where(function (Builder $query) use ($search) {
                 $query->whereHasMorph('subject', ['App\Models\Item'], function (Builder $query) use ($search) {
-                    $query->where('private', false);
+                    $query->visibleForCurrentUser();
 
                     // Add search filter for items
                     if (!empty($search)) {
@@ -141,7 +145,8 @@ public function activityList(Request $request): JsonResponse
                     }
                 })
                 ->orWhereHasMorph('subject', ['App\Models\Comment'], function (Builder $query) use ($search) {
-                    $query->where('private', false);
+                    $query->public()
+                        ->whereHas('item', fn ($itemQuery) => $itemQuery->visibleForCurrentUser());
 
                     // For comments, search the related item title
                     if (!empty($search)) {
diff --git a/app/Livewire/Activity.php b/app/Livewire/Activity.php
index 8349e26b..f9d5d09a 100644
--- a/app/Livewire/Activity.php
+++ b/app/Livewire/Activity.php
@@ -24,13 +24,18 @@ public function table(Table $table): Table
         return $table
             ->query(
                 ActivityModel::query()
-                    ->with(['causer', 'subject.user', 'subject.comments'])
+                    ->with([
+                        'causer',
+                        'subject.user',
+                        'subject.comments' => fn ($query) => $query->public(),
+                    ])
                     ->where(function (Builder $query) {
                         $query->whereHasMorph('subject', ['App\Models\Item'], function (Builder $query) {
-                            $query->where('private', false);
+                            $query->visibleForCurrentUser();
                         })
                         ->orWhereHasMorph('subject', ['App\Models\Comment'], function (Builder $query) {
-                            $query->where('private', false);
+                            $query->public()
+                                ->whereHas('item', fn ($itemQuery) => $itemQuery->visibleForCurrentUser());
                         });
                     })
                     ->whereNotNull('causer_id')
diff --git a/app/Livewire/Welcome/RecentActivity.php b/app/Livewire/Welcome/RecentActivity.php
index 0f26f8a9..079ecea5 100644
--- a/app/Livewire/Welcome/RecentActivity.php
+++ b/app/Livewire/Welcome/RecentActivity.php
@@ -24,13 +24,18 @@ public function table(Table $table): Table
         return $table
             ->query(
                 Activity::query()
-                    ->with(['causer', 'subject.user', 'subject.comments'])
+                    ->with([
+                        'causer',
+                        'subject.user',
+                        'subject.comments' => fn ($query) => $query->public(),
+                    ])
                     ->where(function (Builder $query) {
                         $query->whereHasMorph('subject', ['App\Models\Item'], function (Builder $query) {
-                            $query->where('private', false);
+                            $query->visibleForCurrentUser();
                         })
                         ->orWhereHasMorph('subject', ['App\Models\Comment'], function (Builder $query) {
-                            $query->where('private', false);
+                            $query->public()
+                                ->whereHas('item', fn ($itemQuery) => $itemQuery->visibleForCurrentUser());
                         });
                     })
                     ->whereNotNull('causer_id')
diff --git a/tests/Feature/Livewire/ActivityTest.php b/tests/Feature/Livewire/ActivityTest.php
index 3c667c55..7d56ade6 100644
--- a/tests/Feature/Livewire/ActivityTest.php
+++ b/tests/Feature/Livewire/ActivityTest.php
@@ -2,6 +2,7 @@
 
 use App\Models\Item;
 use Livewire\Livewire;
+use App\Models\Project;
 use App\Livewire\Activity;
 use App\Enums\ItemActivity;
 
@@ -95,3 +96,18 @@
     $response->assertSee('Created the item');
     $response->assertDontSee('Made item private');
 });
+
+test('activity page does not show activities for items in private projects', function () {
+    $user = createAndLoginUser();
+    $project = Project::factory()->private()->create();
+    $item = Item::factory()->create([
+        'project_id' => $project->id,
+        'title' => 'Private Project Activity',
+        'user_id' => $user->id,
+    ]);
+
+    ItemActivity::createForItem($item, ItemActivity::Created);
+
+    $this->get(route('activity'))
+        ->assertDontSee('Private Project Activity');
+});
diff --git a/tests/Feature/Livewire/Welcome/RecentActivityTest.php b/tests/Feature/Livewire/Welcome/RecentActivityTest.php
index 2322315f..6f6a3f9f 100644
--- a/tests/Feature/Livewire/Welcome/RecentActivityTest.php
+++ b/tests/Feature/Livewire/Welcome/RecentActivityTest.php
@@ -4,6 +4,7 @@
 use App\Models\User;
 use Livewire\Livewire;
 use App\Models\Comment;
+use App\Models\Project;
 use App\Enums\ItemActivity;
 use Spatie\Activitylog\Models\Activity;
 use App\Livewire\Welcome\RecentActivity;
@@ -55,6 +56,21 @@
     $component->assertDontSee('Made item private');
 });
 
+test('recent activity does not show activities for items in private projects', function () {
+    $user = createAndLoginUser();
+    $project = Project::factory()->private()->create();
+    $item = Item::factory()->create([
+        'project_id' => $project->id,
+        'title' => 'Private Project Recent Activity',
+        'user_id' => $user->id,
+    ]);
+
+    ItemActivity::createForItem($item, ItemActivity::Created);
+
+    Livewire::test(RecentActivity::class)
+        ->assertDontSee('Private Project Recent Activity');
+});
+
 test('recent activity does not show activities without causer', function () {
     $user = createAndLoginUser();
 
diff --git a/tests/Feature/Widget/WidgetTest.php b/tests/Feature/Widget/WidgetTest.php
index 3db6d47b..aacd8bcb 100644
--- a/tests/Feature/Widget/WidgetTest.php
+++ b/tests/Feature/Widget/WidgetTest.php
@@ -1,6 +1,9 @@
 <?php
 
 use App\Models\Item;
+use App\Models\Comment;
+use App\Models\Project;
+use App\Enums\ItemActivity;
 use App\Models\User;
 use App\Settings\WidgetSettings;
 use App\Settings\ActivityWidgetSettings;
@@ -16,6 +19,44 @@
     $this->settings->save();
 });
 
+test('activity widget excludes private project items and private note counts', function () {
+    $activitySettings = app(ActivityWidgetSettings::class);
+    $activitySettings->enabled = true;
+    $activitySettings->allowed_domains = [];
+    $activitySettings->save();
+
+    $user = createUser();
+    $this->actingAs($user);
+    $privateProject = Project::factory()->private()->create();
+    $privateProjectItem = Item::factory()->create([
+        'project_id' => $privateProject->id,
+        'title' => 'Private Project Widget Activity',
+        'user_id' => $user->id,
+    ]);
+    $publicItem = Item::factory()->create([
+        'title' => 'Public Widget Activity',
+        'user_id' => $user->id,
+    ]);
+
+    Comment::factory()->create(['item_id' => $publicItem->id, 'private' => false]);
+    Comment::factory()->create(['item_id' => $publicItem->id, 'private' => true]);
+    ItemActivity::createForItem($privateProjectItem, ItemActivity::Created);
+    ItemActivity::createForItem($publicItem, ItemActivity::Created);
+
+    $response = $this->getJson('/api/activity-widget/activities');
+
+    $response->assertSuccessful();
+
+    expect(json_encode($response->json(), JSON_THROW_ON_ERROR))
+        ->not->toContain('Private Project Widget Activity');
+
+    $publicActivity = collect($response->json('activities'))
+        ->first(fn (array $activity) => str_contains($activity['description'], 'Public Widget Activity'));
+
+    expect($publicActivity)->not->toBeNull()
+        ->and($publicActivity['comments'])->toBe(1);
+});
+
 test('widget config endpoint returns configuration when enabled', function () {
     $response = $this->getJson('/api/widget/config');