diff --git a/libtaskmanager/activityinfo.h b/libtaskmanager/activityinfo.h
--- a/libtaskmanager/activityinfo.h
+++ b/libtaskmanager/activityinfo.h
@@ -86,6 +86,12 @@
     void currentActivityChanged() const;
     void numberOfRunningActivitiesChanged() const;
 
+    /**
+     * The names of the running activities have changed.
+     * @since 5.40.0
+     **/
+    void namesOfRunningActivitiesChanged() const;
+
 private:
     class Private;
     QScopedPointer<Private> d;
diff --git a/libtaskmanager/activityinfo.cpp b/libtaskmanager/activityinfo.cpp
--- a/libtaskmanager/activityinfo.cpp
+++ b/libtaskmanager/activityinfo.cpp
@@ -20,6 +20,7 @@
 
 #include "activityinfo.h"
 
+#include <KActivities/ActivitiesModel>
 #include <KActivities/Consumer>
 
 namespace TaskManager
@@ -33,10 +34,13 @@
 
     static int instanceCount;
     static KActivities::Consumer* activityConsumer;
+    static KActivities::ActivitiesModel* activitiesModel;
 };
 
 int ActivityInfo::Private::instanceCount = 0;
 KActivities::Consumer* ActivityInfo::Private::activityConsumer = nullptr;
+KActivities::ActivitiesModel* ActivityInfo::Private::activitiesModel = nullptr;
+
 
 ActivityInfo::Private::Private(ActivityInfo *)
 {
@@ -50,6 +54,8 @@
     if (!instanceCount) {
         delete activityConsumer;
         activityConsumer = nullptr;
+        delete activitiesModel;
+        activitiesModel = nullptr;
     }
 }
 
@@ -64,6 +70,27 @@
         this, &ActivityInfo::currentActivityChanged);
     connect(d->activityConsumer, &KActivities::Consumer::runningActivitiesChanged,
         this, &ActivityInfo::numberOfRunningActivitiesChanged);
+    connect(d->activityConsumer, &KActivities::Consumer::runningActivitiesChanged,
+        this, &ActivityInfo::namesOfRunningActivitiesChanged);
+
+    if (!d->activitiesModel) {
+        d->activitiesModel = new KActivities::ActivitiesModel();
+        d->activitiesModel->setShownStates(QVector<KActivities::Info::State>{KActivities::Info::Running});
+    }
+
+    connect(d->activitiesModel, &KActivities::ActivitiesModel::modelReset,
+        this, &ActivityInfo::namesOfRunningActivitiesChanged);
+
+    connect(d->activitiesModel, &KActivities::ActivitiesModel::dataChanged, this,
+        [this](const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int> &roles) {
+            Q_UNUSED(topLeft)
+            Q_UNUSED(bottomRight)
+
+            if (roles.isEmpty() || roles.contains(Qt::DisplayRole)) {
+                emit namesOfRunningActivitiesChanged();
+            }
+        }
+    );
 }
 
 ActivityInfo::~ActivityInfo()