diff --git a/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/ReferrerMainCenterAggregator.php b/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/ReferrerMainCenterAggregator.php
new file mode 100644
index 000000000..6079b0a1b
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/ReferrerMainCenterAggregator.php
@@ -0,0 +1,143 @@
+<?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\AccompanyingCourseAggregators;
+
+use Chill\MainBundle\Export\AggregatorInterface;
+use Chill\MainBundle\Export\DataTransformerInterface;
+use Chill\MainBundle\Form\Type\PickRollingDateType;
+use Chill\MainBundle\Repository\CenterRepositoryInterface;
+use Chill\MainBundle\Service\RollingDate\RollingDate;
+use Chill\MainBundle\Service\RollingDate\RollingDateConverterInterface;
+use Chill\PersonBundle\Export\Declarations;
+use Doctrine\ORM\Query\Expr\Join;
+use Doctrine\ORM\QueryBuilder;
+use Symfony\Component\Form\FormBuilderInterface;
+
+final readonly class ReferrerMainCenterAggregator implements AggregatorInterface, DataTransformerInterface
+{
+    private const P = 'acp_agg_referrer_main_center';
+
+    public function __construct(
+        private CenterRepositoryInterface $centerRepository,
+        private RollingDateConverterInterface $rollingDateConverter,
+    ) {}
+
+    public function addRole(): ?string
+    {
+        return null;
+    }
+
+    public function alterQuery(QueryBuilder $qb, $data, \Chill\MainBundle\Export\ExportGenerationContext $exportGenerationContext): void
+    {
+        $p = self::P;
+
+        $qb
+            ->leftJoin('acp.userHistories', "{$p}_uh", Join::WITH, $qb->expr()->andX(
+                $qb->expr()->eq("{$p}_uh.accompanyingPeriod", 'acp.id'),
+                "OVERLAPSI (acp.openingDate, acp.closingDate), ({$p}_uh.startDate, {$p}_uh.endDate) = TRUE",
+                "OVERLAPSI (:{$p}_startDate, :{$p}_endDate), ({$p}_uh.startDate, {$p}_uh.endDate) = TRUE"
+            ))
+            ->leftJoin("{$p}_uh.user", "{$p}_user")
+            ->addSelect("IDENTITY({$p}_user.mainCenter) AS {$p}_select")
+            ->addGroupBy("{$p}_select")
+            ->setParameter("{$p}_startDate", $this->rollingDateConverter->convert($data['start_date']))
+            ->setParameter("{$p}_endDate", $this->rollingDateConverter->convert($data['end_date']));
+    }
+
+    public function applyOn(): string
+    {
+        return Declarations::ACP_TYPE;
+    }
+
+    public function buildForm(FormBuilderInterface $builder): void
+    {
+        $builder
+            ->add('start_date', PickRollingDateType::class, [
+                'label' => 'common.after',
+                'required' => true,
+            ])
+            ->add('end_date', PickRollingDateType::class, [
+                'label' => 'common.until',
+                'required' => true,
+            ]);
+    }
+
+    public function getNormalizationVersion(): int
+    {
+        return 1;
+    }
+
+    public function normalizeFormData(array $formData): array
+    {
+        return [
+            'start_date' => $formData['start_date']->normalize(),
+            'end_date' => $formData['end_date']->normalize(),
+        ];
+    }
+
+    public function denormalizeFormData(array $formData, int $fromVersion): array
+    {
+        $default = $this->getFormDefaultData();
+
+        return [
+            'start_date' => array_key_exists('start_date', $formData) ? RollingDate::fromNormalized($formData['start_date']) : $default['start_date'],
+            'end_date' => array_key_exists('end_date', $formData) ? RollingDate::fromNormalized($formData['end_date']) : $default['end_date'],
+        ];
+    }
+
+    public function getFormDefaultData(): array
+    {
+        return [
+            'start_date' => new RollingDate(RollingDate::T_YEAR_CURRENT_START),
+            'end_date' => new RollingDate(RollingDate::T_TODAY),
+        ];
+    }
+
+    public function transformData(?array $before): array
+    {
+        $default = $this->getFormDefaultData();
+
+        if (null === $before) {
+            return $default;
+        }
+
+        return [
+            'start_date' => $before['start_date'] ?? $before['date_calc'] ?? $default['start_date'],
+            'end_date' => $before['end_date'] ?? $before['date_calc'] ?? $default['end_date'],
+        ];
+    }
+
+    public function getLabels($key, array $values, $data): callable
+    {
+        return function ($value): string {
+            if ('_header' === $value) {
+                return 'person.export.period.aggregator.by_referrer_main_center.column_header';
+            }
+
+            if (null === $value || '' === $value) {
+                return '';
+            }
+
+            return (string) $this->centerRepository->find((int) $value)?->getName();
+        };
+    }
+
+    public function getQueryKeys($data): array
+    {
+        return [self::P.'_select'];
+    }
+
+    public function getTitle(): string
+    {
+        return 'person.export.period.aggregator.by_referrer_main_center.title';
+    }
+}
diff --git a/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/ReferrerMainCenterFilter.php b/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/ReferrerMainCenterFilter.php
new file mode 100644
index 000000000..3f5fdfdf1
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/ReferrerMainCenterFilter.php
@@ -0,0 +1,134 @@
+<?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\Filter\AccompanyingCourseFilters;
+
+use Chill\MainBundle\Entity\Center;
+use Chill\MainBundle\Export\ExportGenerationContext;
+use Chill\MainBundle\Export\FilterInterface;
+use Chill\MainBundle\Form\Type\PickRollingDateType;
+use Chill\MainBundle\Repository\CenterRepositoryInterface;
+use Chill\MainBundle\Service\RollingDate\RollingDate;
+use Chill\MainBundle\Service\RollingDate\RollingDateConverterInterface;
+use Chill\PersonBundle\Export\Declarations;
+use Doctrine\ORM\QueryBuilder;
+use Symfony\Bridge\Doctrine\Form\Type\EntityType;
+use Symfony\Component\Form\FormBuilderInterface;
+
+/**
+ * Filter accompanying periods by the main center of their referrer (at a given date).
+ */
+final readonly class ReferrerMainCenterFilter implements FilterInterface
+{
+    private const UH = 'acp_referrer_main_center_filter_uh';
+    private const DATE_PARAM = 'acp_referrer_main_center_filter_date';
+
+    public function __construct(
+        private RollingDateConverterInterface $rollingDateConverter,
+        private CenterRepositoryInterface $centerRepository,
+    ) {}
+
+    public function addRole(): ?string
+    {
+        return null;
+    }
+
+    public function alterQuery(QueryBuilder $qb, $data, ExportGenerationContext $exportGenerationContext): void
+    {
+        $qb
+            ->join('acp.userHistories', self::UH)
+            ->join(self::UH.'.user', self::UH.'_user')
+            ->andWhere(
+                $qb->expr()->andX(
+                    $qb->expr()->lte(self::UH.'.startDate', ':'.self::DATE_PARAM),
+                    $qb->expr()->orX(
+                        $qb->expr()->isNull(self::UH.'.endDate'),
+                        $qb->expr()->gt(self::UH.'.endDate', ':'.self::DATE_PARAM)
+                    )
+                )
+            )
+            ->andWhere('IDENTITY('.self::UH.'_user.mainCenter) IN (:acp_referrer_main_center_filter_centers)')
+            ->setParameter(self::DATE_PARAM, $this->rollingDateConverter->convert($data['date_calc']))
+            ->setParameter('acp_referrer_main_center_filter_centers', array_map(
+                static fn (Center $c): int => $c->getId(),
+                $data['centers']
+            ));
+    }
+
+    public function applyOn(): string
+    {
+        return Declarations::ACP_TYPE;
+    }
+
+    public function buildForm(FormBuilderInterface $builder): void
+    {
+        $builder
+            ->add('centers', EntityType::class, [
+                'class' => Center::class,
+                'multiple' => true,
+                'expanded' => false,
+                'choice_label' => static fn (Center $c) => $c->getName(),
+                'required' => true,
+                'label' => 'common.centers',
+            ])
+            ->add('date_calc', PickRollingDateType::class, [
+                'label' => 'person.export.period.filter.by_referrer_main_center.referrer_since',
+                'required' => true,
+            ]);
+    }
+
+    public function getNormalizationVersion(): int
+    {
+        return 1;
+    }
+
+    public function normalizeFormData(array $formData): array
+    {
+        return [
+            'centers' => array_values(array_map(static fn (Center $c) => $c->getId(), $formData['centers'])),
+            'date_calc' => $formData['date_calc']->normalize(),
+        ];
+    }
+
+    public function denormalizeFormData(array $formData, int $fromVersion): array
+    {
+        return [
+            'centers' => array_values(array_filter(array_map(
+                fn (int $id) => $this->centerRepository->find($id),
+                $formData['centers'] ?? []
+            ))),
+            'date_calc' => RollingDate::fromNormalized($formData['date_calc']),
+        ];
+    }
+
+    public function getFormDefaultData(): array
+    {
+        return [
+            'centers' => [],
+            'date_calc' => new RollingDate(RollingDate::T_TODAY),
+        ];
+    }
+
+    public function describeAction($data, ExportGenerationContext $context): array|string
+    {
+        $names = array_map(static fn (Center $c) => $c->getName(), $data['centers']);
+
+        return [
+            'person.export.period.filter.by_referrer_main_center.action_%centers%',
+            ['%centers%' => implode(', ', $names)],
+        ];
+    }
+
+    public function getTitle(): string
+    {
+        return 'person.export.period.filter.by_referrer_main_center.title';
+    }
+}
diff --git a/src/Bundle/ChillPersonBundle/config/services/exports_accompanying_course.yaml b/src/Bundle/ChillPersonBundle/config/services/exports_accompanying_course.yaml
index d488df8d6..b7ab71d40 100644
--- a/src/Bundle/ChillPersonBundle/config/services/exports_accompanying_course.yaml
+++ b/src/Bundle/ChillPersonBundle/config/services/exports_accompanying_course.yaml
@@ -104,6 +104,10 @@ services:
         tags:
             - { name: chill.export_filter, alias: accompanyingcourse_referrer_filter_between_dates }
 
+    Chill\PersonBundle\Export\Filter\AccompanyingCourseFilters\ReferrerMainCenterFilter:
+        tags:
+            - { name: chill.export_filter, alias: accompanyingcourse_referrer_main_center_filter }
+
     chill.person.export.filter_openbetweendates:
         class: Chill\PersonBundle\Export\Filter\AccompanyingCourseFilters\OpenBetweenDatesFilter
         tags:
@@ -270,3 +274,7 @@ services:
     Chill\PersonBundle\Export\Aggregator\AccompanyingCourseAggregators\PersonParticipatingAggregator:
         tags:
             - { name: chill.export_aggregator, alias: accompanyingcourse_person_part_aggregator }
+
+    Chill\PersonBundle\Export\Aggregator\AccompanyingCourseAggregators\ReferrerMainCenterAggregator:
+        tags:
+            - { name: chill.export_aggregator, alias: accompanyingcourse_referrer_main_center_aggregator }