diff --git a/.changes/unreleased/Feature-20231018-164927.yaml b/.changes/unreleased/Feature-20231018-164927.yaml
new file mode 100644
index 000000000..cf0be6fef
--- /dev/null
+++ b/.changes/unreleased/Feature-20231018-164927.yaml
@@ -0,0 +1,6 @@
+kind: Feature
+body: '[export] add a grouping on accompanying period export: group by activity type
+  associated to at least one activity within the accompanying period'
+time: 2023-10-18T16:49:27.567166953+02:00
+custom:
+  Issue: "172"
diff --git a/src/Bundle/ChillActivityBundle/Export/Aggregator/ACPAggregators/ByActivityTypeAggregator.php b/src/Bundle/ChillActivityBundle/Export/Aggregator/ACPAggregators/ByActivityTypeAggregator.php
new file mode 100644
index 000000000..cdb66bb77
--- /dev/null
+++ b/src/Bundle/ChillActivityBundle/Export/Aggregator/ACPAggregators/ByActivityTypeAggregator.php
@@ -0,0 +1,122 @@
+<?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\ActivityBundle\Export\Aggregator\ACPAggregators;
+
+use Chill\ActivityBundle\Entity\Activity;
+use Chill\ActivityBundle\Entity\ActivityType;
+use Chill\ActivityBundle\Repository\ActivityTypeRepositoryInterface;
+use Chill\MainBundle\Export\AggregatorInterface;
+use Chill\MainBundle\Form\Type\PickRollingDateType;
+use Chill\MainBundle\Service\RollingDate\RollingDateConverterInterface;
+use Chill\MainBundle\Templating\TranslatableStringHelperInterface;
+use Chill\PersonBundle\Export\Declarations;
+use Doctrine\ORM\Query\Expr\Join;
+use Doctrine\ORM\QueryBuilder;
+use Symfony\Component\Form\FormBuilderInterface;
+
+final readonly class ByActivityTypeAggregator implements AggregatorInterface
+{
+    private const PREFIX = 'acp_by_activity_type_agg';
+
+    public function __construct(
+        private RollingDateConverterInterface $rollingDateConverter,
+        private ActivityTypeRepositoryInterface $activityTypeRepository,
+        private TranslatableStringHelperInterface $translatableStringHelper,
+    ) {}
+
+    public function buildForm(FormBuilderInterface $builder)
+    {
+        $builder
+            ->add('after_date', PickRollingDateType::class, [
+                'required' => false,
+                'label' => 'export.aggregator.acp.by_activity_type.after_date',
+            ])
+            ->add('before_date', PickRollingDateType::class, [
+                'required' => false,
+                'label' => 'export.aggregator.acp.by_activity_type.before_date',
+            ]);
+    }
+
+    public function getFormDefaultData(): array
+    {
+        return [
+            'before_date' => null,
+            'after_date' => null,
+        ];
+    }
+
+    public function getLabels($key, array $values, mixed $data)
+    {
+        return function (null|int|string $value): string {
+            if ('_header' === $value) {
+                return 'export.aggregator.acp.by_activity_type.activity_type';
+            }
+
+            if ('' === $value || null === $value || null === $activityType = $this->activityTypeRepository->find($value)) {
+                return '';
+            }
+
+            return $this->translatableStringHelper->localize($activityType->getName());
+        };
+    }
+
+    public function getQueryKeys($data)
+    {
+        return [self::PREFIX.'_actype_id'];
+    }
+
+    public function getTitle()
+    {
+        return 'export.aggregator.acp.by_activity_type.title';
+    }
+
+    public function addRole(): ?string
+    {
+        return null;
+    }
+
+    public function alterQuery(QueryBuilder $qb, $data)
+    {
+        $p = self::PREFIX;
+
+        // we make a left join, with acp having at least one activity of the given type
+        $exists = 'EXISTS (SELECT 1 FROM '.Activity::class." {$p}_activity WHERE {$p}_activity.accompanyingPeriod = acp AND {$p}_activity.activityType = {$p}_activity_type";
+
+        if (null !== $data['after_date']) {
+            $exists .= " AND {$p}_activity.date > :{$p}_after_date";
+            $qb->setParameter("{$p}_after_date", $this->rollingDateConverter->convert($data['after_date']));
+        }
+
+        if (null !== $data['before_date']) {
+            $exists .= " AND {$p}_activity.date < :{$p}_before_date";
+            $qb->setParameter("{$p}_before_date", $this->rollingDateConverter->convert($data['before_date']));
+        }
+
+        $exists .= ')';
+
+        $qb->leftJoin(
+            ActivityType::class,
+            "{$p}_activity_type",
+            Join::WITH,
+            $exists
+        );
+
+        $qb
+            ->addSelect("{$p}_activity_type.id AS {$p}_actype_id")
+            ->addGroupBy("{$p}_actype_id");
+    }
+
+    public function applyOn()
+    {
+        return Declarations::ACP_TYPE;
+    }
+}
diff --git a/src/Bundle/ChillActivityBundle/Tests/Export/Aggregator/ACPAggregators/ByActivityTypeAggregatorTest.php b/src/Bundle/ChillActivityBundle/Tests/Export/Aggregator/ACPAggregators/ByActivityTypeAggregatorTest.php
new file mode 100644
index 000000000..2d78585f7
--- /dev/null
+++ b/src/Bundle/ChillActivityBundle/Tests/Export/Aggregator/ACPAggregators/ByActivityTypeAggregatorTest.php
@@ -0,0 +1,87 @@
+<?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\ActivityBundle\Tests\Export\Aggregator\ACPAggregators;
+
+use Chill\ActivityBundle\Export\Aggregator\ACPAggregators\ByActivityTypeAggregator;
+use Chill\ActivityBundle\Repository\ActivityTypeRepositoryInterface;
+use Chill\MainBundle\Service\RollingDate\RollingDate;
+use Chill\MainBundle\Service\RollingDate\RollingDateConverterInterface;
+use Chill\MainBundle\Templating\TranslatableStringHelperInterface;
+use Chill\MainBundle\Test\Export\AbstractAggregatorTest;
+use Chill\PersonBundle\Entity\AccompanyingPeriod;
+use Doctrine\ORM\EntityManagerInterface;
+
+/**
+ * @internal
+ *
+ * @coversNothing
+ */
+class ByActivityTypeAggregatorTest extends AbstractAggregatorTest
+{
+    private RollingDateConverterInterface $rollingDateConverter;
+    private ActivityTypeRepositoryInterface $activityTypeRepository;
+    private TranslatableStringHelperInterface $translatableStringHelper;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        self::bootKernel();
+        $this->rollingDateConverter = self::$container->get(RollingDateConverterInterface::class);
+        $this->activityTypeRepository = self::$container->get(ActivityTypeRepositoryInterface::class);
+        $this->translatableStringHelper = self::$container->get(TranslatableStringHelperInterface::class);
+    }
+
+    public function getAggregator()
+    {
+        return new ByActivityTypeAggregator(
+            $this->rollingDateConverter,
+            $this->activityTypeRepository,
+            $this->translatableStringHelper,
+        );
+    }
+
+    public function getFormData()
+    {
+        return [
+            [
+                'after_date' => null,
+                'before_date' => null,
+            ],
+            [
+                'after_date' => new RollingDate(RollingDate::T_YEAR_PREVIOUS_START),
+                'before_date' => null,
+            ],
+            [
+                'after_date' => null,
+                'before_date' => new RollingDate(RollingDate::T_TODAY),
+            ],
+            [
+                'after_date' => new RollingDate(RollingDate::T_YEAR_PREVIOUS_START),
+                'before_date' => new RollingDate(RollingDate::T_TODAY),
+            ],
+        ];
+    }
+
+    public function getQueryBuilders()
+    {
+        self::bootKernel();
+
+        $em = self::$container->get(EntityManagerInterface::class);
+
+        return [
+            $em->createQueryBuilder()
+                ->select('count(distinct acp.id)')
+                ->from(AccompanyingPeriod::class, 'acp'),
+        ];
+    }
+}
diff --git a/src/Bundle/ChillActivityBundle/config/services/export.yaml b/src/Bundle/ChillActivityBundle/config/services/export.yaml
index 3bb3b3695..24f10d399 100644
--- a/src/Bundle/ChillActivityBundle/config/services/export.yaml
+++ b/src/Bundle/ChillActivityBundle/config/services/export.yaml
@@ -208,3 +208,7 @@ services:
     Chill\ActivityBundle\Export\Aggregator\PersonsAggregator:
         tags:
             - { name: chill.export_aggregator, alias: activity_by_persons_aggregator }
+
+    Chill\ActivityBundle\Export\Aggregator\ACPAggregators\ByActivityTypeAggregator:
+        tags:
+            - { name: chill.export_aggregator, alias: acp_by_activity_type_aggregator }
diff --git a/src/Bundle/ChillActivityBundle/translations/messages.fr.yml b/src/Bundle/ChillActivityBundle/translations/messages.fr.yml
index 9c84e1815..b952ce3a8 100644
--- a/src/Bundle/ChillActivityBundle/translations/messages.fr.yml
+++ b/src/Bundle/ChillActivityBundle/translations/messages.fr.yml
@@ -383,6 +383,12 @@ export:
                 persons taking part on the activity: Usagers participants à l'échange
 
     aggregator:
+        acp:
+            by_activity_type:
+                title: Grouper les parcours par type d'échange
+                after_date: Uniquement échanges après cette date
+                before_date: Uniquement échanges avant cette date
+                activity_type: Types d'échange
         activity:
             by_sent_received:
                 Sent or received: Envoyé ou reçu
diff --git a/src/Bundle/ChillMainBundle/Form/Type/PickRollingDateType.php b/src/Bundle/ChillMainBundle/Form/Type/PickRollingDateType.php
index c23e0fa81..8ceb08578 100644
--- a/src/Bundle/ChillMainBundle/Form/Type/PickRollingDateType.php
+++ b/src/Bundle/ChillMainBundle/Form/Type/PickRollingDateType.php
@@ -34,6 +34,7 @@ class PickRollingDateType extends AbstractType
                 ),
                 'multiple' => false,
                 'expanded' => false,
+                'required' => $options['required'],
                 'label' => 'rolling_date.roll_movement',
             ])
             ->add('fixedDate', ChillDateType::class, [
@@ -57,7 +58,10 @@ class PickRollingDateType extends AbstractType
             'constraints' => [
                 new Callback($this->validate(...)),
             ],
+            'required' => true,
         ]);
+
+        $resolver->setAllowedTypes('required', 'bool');
     }
 
     public function validate($data, ExecutionContextInterface $context, $payload): void