diff --git a/src/Bundle/ChillMainBundle/Export/DataTransformerFilterInterface.php b/src/Bundle/ChillMainBundle/Export/DataTransformerInterface.php
similarity index 64%
rename from src/Bundle/ChillMainBundle/Export/DataTransformerFilterInterface.php
rename to src/Bundle/ChillMainBundle/Export/DataTransformerInterface.php
index 055ee2edc..ed34bc9d6 100644
--- a/src/Bundle/ChillMainBundle/Export/DataTransformerFilterInterface.php
+++ b/src/Bundle/ChillMainBundle/Export/DataTransformerInterface.php
@@ -16,10 +16,10 @@ namespace Chill\MainBundle\Export;
  *
  * This interface defines a method for transforming filter's form data before it is processed.
  *
- * You can implement this interface on @see{FilterInterface}, to allow to transform existing data in saved exports
- * and replace it with some default values.
+ * You can implement this interface on @see{FilterInterface} or @see{AggregatorInterface}, to allow to transform existing data in saved exports
+ * and replace it with some default values, or new default values.
  */
-interface DataTransformerFilterInterface
+interface DataTransformerInterface
 {
     public function transformData(?array $before): array;
 }
diff --git a/src/Bundle/ChillMainBundle/Form/Type/Export/AggregatorType.php b/src/Bundle/ChillMainBundle/Form/Type/Export/AggregatorType.php
index 1ea01d5f8..89d4586ce 100644
--- a/src/Bundle/ChillMainBundle/Form/Type/Export/AggregatorType.php
+++ b/src/Bundle/ChillMainBundle/Form/Type/Export/AggregatorType.php
@@ -11,7 +11,9 @@ declare(strict_types=1);
 
 namespace Chill\MainBundle\Form\Type\Export;
 
+use Chill\MainBundle\Export\DataTransformerInterface;
 use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\CallbackTransformer;
 use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
 use Symfony\Component\Form\Extension\Core\Type\FormType;
 use Symfony\Component\Form\FormBuilderInterface;
@@ -19,11 +21,7 @@ use Symfony\Component\OptionsResolver\OptionsResolver;
 
 class AggregatorType extends AbstractType
 {
-    public function __construct()
-    {
-    }
-
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         $exportManager = $options['export_manager'];
         $aggregator = $exportManager->getAggregator($options['aggregator_alias']);
@@ -34,17 +32,26 @@ class AggregatorType extends AbstractType
                 'required' => false,
             ]);
 
-        $filterFormBuilder = $builder->create('form', FormType::class, [
+        $aggregatorFormBuilder = $builder->create('form', FormType::class, [
             'compound' => true,
             'required' => false,
             'error_bubbling' => false,
         ]);
-        $aggregator->buildForm($filterFormBuilder);
+        $aggregator->buildForm($aggregatorFormBuilder);
 
-        $builder->add($filterFormBuilder);
+        if ($aggregator instanceof DataTransformerInterface) {
+            $aggregatorFormBuilder->addViewTransformer(new CallbackTransformer(
+                fn (?array $data) => $data,
+                function (?array $data) use ($aggregator) {
+                    return $aggregator->transformData($data);
+                },
+            ));
+        }
+
+        $builder->add($aggregatorFormBuilder);
     }
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setRequired('aggregator_alias')
             ->setRequired('export_manager')
diff --git a/src/Bundle/ChillMainBundle/Form/Type/Export/FilterType.php b/src/Bundle/ChillMainBundle/Form/Type/Export/FilterType.php
index 4e0976c12..5ac876bfe 100644
--- a/src/Bundle/ChillMainBundle/Form/Type/Export/FilterType.php
+++ b/src/Bundle/ChillMainBundle/Form/Type/Export/FilterType.php
@@ -11,7 +11,7 @@ declare(strict_types=1);
 
 namespace Chill\MainBundle\Form\Type\Export;
 
-use Chill\MainBundle\Export\DataTransformerFilterInterface;
+use Chill\MainBundle\Export\DataTransformerInterface;
 use Chill\MainBundle\Export\FilterInterface;
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\CallbackTransformer;
@@ -45,7 +45,7 @@ class FilterType extends AbstractType
         ]);
         $filter->buildForm($filterFormBuilder);
 
-        if ($filter instanceof DataTransformerFilterInterface) {
+        if ($filter instanceof DataTransformerInterface) {
             $filterFormBuilder->addViewTransformer(new CallbackTransformer(
                 fn (?array $data) => $data,
                 function (?array $data) use ($filter) {
diff --git a/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/UserJobFilter.php b/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/UserJobFilter.php
index 120d0a70e..c958272fc 100644
--- a/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/UserJobFilter.php
+++ b/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/UserJobFilter.php
@@ -13,7 +13,7 @@ namespace Chill\PersonBundle\Export\Filter\AccompanyingCourseFilters;
 
 use Chill\MainBundle\Entity\User\UserJobHistory;
 use Chill\MainBundle\Entity\UserJob;
-use Chill\MainBundle\Export\DataTransformerFilterInterface;
+use Chill\MainBundle\Export\DataTransformerInterface;
 use Chill\MainBundle\Export\FilterInterface;
 use Chill\MainBundle\Form\Type\PickRollingDateType;
 use Chill\MainBundle\Repository\UserJobRepositoryInterface;
@@ -27,7 +27,7 @@ use Doctrine\ORM\QueryBuilder;
 use Symfony\Bridge\Doctrine\Form\Type\EntityType;
 use Symfony\Component\Form\FormBuilderInterface;
 
-final readonly class UserJobFilter implements FilterInterface, DataTransformerFilterInterface
+final readonly class UserJobFilter implements FilterInterface, DataTransformerInterface
 {
     private const PREFIX = 'acp_filter_user_job';
 
diff --git a/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/UserScopeFilter.php b/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/UserScopeFilter.php
index 7e6b1d185..5b8ff7526 100644
--- a/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/UserScopeFilter.php
+++ b/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/UserScopeFilter.php
@@ -13,6 +13,7 @@ namespace Chill\PersonBundle\Export\Filter\AccompanyingCourseFilters;
 
 use Chill\MainBundle\Entity\Scope;
 use Chill\MainBundle\Entity\User\UserScopeHistory;
+use Chill\MainBundle\Export\DataTransformerInterface;
 use Chill\MainBundle\Export\FilterInterface;
 use Chill\MainBundle\Form\Type\PickRollingDateType;
 use Chill\MainBundle\Repository\ScopeRepositoryInterface;
@@ -26,7 +27,7 @@ use Doctrine\ORM\QueryBuilder;
 use Symfony\Bridge\Doctrine\Form\Type\EntityType;
 use Symfony\Component\Form\FormBuilderInterface;
 
-final readonly class UserScopeFilter implements FilterInterface
+final readonly class UserScopeFilter implements FilterInterface, DataTransformerInterface
 {
     private const PREFIX = 'acp_filter_main_scope';