diff --git a/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingPeriodStepHistoryAggregators/ByStepAggregator.php b/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingPeriodStepHistoryAggregators/ByStepAggregator.php
new file mode 100644
index 000000000..005d012f9
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingPeriodStepHistoryAggregators/ByStepAggregator.php
@@ -0,0 +1,86 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\PersonBundle\Export\Aggregator\AccompanyingPeriodStepHistoryAggregators;
+
+use Chill\MainBundle\Export\AggregatorInterface;
+use Chill\PersonBundle\Export\Declarations;
+use Chill\PersonBundle\Tests\Export\Aggregator\AccompanyingPeriodStepHistoryAggregators\ByStepAggregatorTest;
+use Doctrine\ORM\QueryBuilder;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Contracts\Translation\TranslatorInterface;
+
+/**
+ * @see ByStepAggregatorTest
+ */
+final readonly class ByStepAggregator implements AggregatorInterface
+{
+    private const KEY = 'acpstephistory_step_agg';
+
+    public function __construct(
+        private TranslatorInterface $translator
+    ) {
+    }
+
+    public function buildForm(FormBuilderInterface $builder)
+    {
+        // nothing in this form
+    }
+
+    public function getFormDefaultData(): array
+    {
+        return [];
+    }
+
+    public function getLabels($key, array $values, mixed $data)
+    {
+        return function (?string $step): string {
+            if ('_header' === $step) {
+                return 'export.aggregator.step_history.by_step.header';
+            }
+
+            if (null === $step || '' === $step) {
+                return '';
+            }
+
+            return $this->translator->trans('accompanying_period.'.$step);
+        };
+    }
+
+    public function getQueryKeys($data)
+    {
+        return [
+            self::KEY,
+        ];
+    }
+
+    public function getTitle()
+    {
+        return 'export.aggregator.step_history.by_step.title';
+    }
+
+    public function addRole(): ?string
+    {
+        return null;
+    }
+
+    public function alterQuery(QueryBuilder $qb, $data)
+    {
+        $qb
+            ->addSelect('acpstephistory.step AS '.self::KEY)
+            ->addGroupBy(self::KEY);
+    }
+
+    public function applyOn()
+    {
+        return Declarations::ACP_STEP_HISTORY;
+    }
+}
diff --git a/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingPeriodStepHistoryAggregators/ByStepAggregatorTest.php b/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingPeriodStepHistoryAggregators/ByStepAggregatorTest.php
new file mode 100644
index 000000000..f71b06351
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingPeriodStepHistoryAggregators/ByStepAggregatorTest.php
@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\PersonBundle\Tests\Export\Aggregator\AccompanyingPeriodStepHistoryAggregators;
+
+use Chill\MainBundle\Test\Export\AbstractAggregatorTest;
+use Chill\PersonBundle\Entity\AccompanyingPeriod\AccompanyingPeriodStepHistory;
+use Chill\PersonBundle\Export\Aggregator\AccompanyingPeriodStepHistoryAggregators\ByStepAggregator;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Contracts\Translation\TranslatorInterface;
+
+/**
+ * @internal
+ *
+ * @coversNothing
+ */
+class ByStepAggregatorTest extends AbstractAggregatorTest
+{
+    public function getAggregator()
+    {
+        $translator = new class () implements TranslatorInterface {
+            public function trans(string $id, array $parameters = [], string $domain = null, string $locale = null)
+            {
+                return $id;
+            }
+        };
+
+        return new ByStepAggregator($translator);
+    }
+
+    public function getFormData()
+    {
+        return [[]];
+    }
+
+    public function getQueryBuilders()
+    {
+        self::bootKernel();
+        $em = self::$container->get(EntityManagerInterface::class);
+
+        $qb = $em->createQueryBuilder()
+            ->select('COUNT(DISTINCT acpstephistory.id) As export_result')
+            ->from(AccompanyingPeriodStepHistory::class, 'acpstephistory')
+            ->join('acpstephistory.period', 'acp');
+
+        return [
+            $qb,
+        ];
+    }
+}
diff --git a/src/Bundle/ChillPersonBundle/translations/messages.fr.yml b/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
index e865cab76..8614a00db 100644
--- a/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
+++ b/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
@@ -1042,6 +1042,11 @@ export:
                 at_date: Date de calcul de l'adresse
                 header: Code postal
 
+        step_history:
+            by_step:
+                title: Grouper les changements de statut du parcours par étape
+                header: Nouveau statut du parcours
+
         course:
             by-user:
                 title: Grouper les parcours par usager participant