diff --git a/bemade_partner_root_ancestor/__init__.py b/bemade_partner_root_ancestor/__init__.py
new file mode 100644
index 0000000..0650744
--- /dev/null
+++ b/bemade_partner_root_ancestor/__init__.py
@@ -0,0 +1 @@
+from . import models
diff --git a/bemade_partner_root_ancestor/__manifest__.py b/bemade_partner_root_ancestor/__manifest__.py
new file mode 100644
index 0000000..a92819b
--- /dev/null
+++ b/bemade_partner_root_ancestor/__manifest__.py
@@ -0,0 +1,32 @@
+#
+#    Bemade Inc.
+#
+#    Copyright (C) June 2023 Bemade Inc. (<https://www.bemade.org>).
+#    Author: mdurepos (Contact : it@bemade.org)
+#
+#    This program is under the terms of the Odoo Proprietary License v1.0 (OPL-1)
+#    It is forbidden to publish, distribute, sublicense, or sell copies of the Software
+#    or modified copies of the Software.
+#
+#    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+#    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+#    IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+#    DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+#    ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+#    DEALINGS IN THE SOFTWARE.
+#
+{
+    'name': 'Partner Root Ancestor',
+    'version': '15.0.1.0.0',
+    'summary': 'Technical module to add the field root_ancestor to res.partner.',
+    'category': 'Generic Modules/Base',
+    'author': 'Bemade Inc.',
+    'website': 'https://www.bemade.org',
+    'license': 'OPL-1',
+    'depends': ['base'],
+    'data': [],
+    'demo': [],
+    'installable': True,
+    'auto_install': False,
+}
diff --git a/bemade_partner_root_ancestor/models/__init__.py b/bemade_partner_root_ancestor/models/__init__.py
new file mode 100644
index 0000000..91fed54
--- /dev/null
+++ b/bemade_partner_root_ancestor/models/__init__.py
@@ -0,0 +1 @@
+from . import res_partner
diff --git a/bemade_partner_root_ancestor/models/res_partner.py b/bemade_partner_root_ancestor/models/res_partner.py
new file mode 100644
index 0000000..0b9181a
--- /dev/null
+++ b/bemade_partner_root_ancestor/models/res_partner.py
@@ -0,0 +1,16 @@
+from odoo import models, fields, api, _, Command
+
+
+class Partner(models.Model):
+    _inherit = 'res.partner'
+
+    root_ancestor = fields.Many2one(comodel_name='res.partner',
+                                    string='Root Ancestor',
+                                    compute='_compute_root_ancestor',
+                                    store=True,
+                                    recursive=True)
+
+    @api.depends('parent_id', 'parent_id.root_ancestor')
+    def _compute_root_ancestor(self):
+        for rec in self:
+            rec.root_ancestor = rec.parent_id and rec.parent_id.root_ancestor or rec
diff --git a/bemade_partner_root_ancestor/tests/__init__.py b/bemade_partner_root_ancestor/tests/__init__.py
new file mode 100644
index 0000000..77fc5d6
--- /dev/null
+++ b/bemade_partner_root_ancestor/tests/__init__.py
@@ -0,0 +1 @@
+from . import test_root_ancestor
diff --git a/bemade_partner_root_ancestor/tests/test_root_ancestor.py b/bemade_partner_root_ancestor/tests/test_root_ancestor.py
new file mode 100644
index 0000000..a4e747e
--- /dev/null
+++ b/bemade_partner_root_ancestor/tests/test_root_ancestor.py
@@ -0,0 +1,55 @@
+from odoo.tests.common import TransactionCase, tagged
+from odoo import Command
+
+
+class TestPartnerRootAncestor(TransactionCase):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        partner = cls.env['res.partner']
+        cls.common_ancestor = partner.create({
+            'name': 'Parnter name',
+            'company_type': 'company',
+        })
+        cls.first_child = partner.create({
+            'name': 'Child name',
+            'company_type': 'company',
+            'parent_id': cls.common_ancestor.id,
+        })
+        cls.second_child = partner.create({
+            'name': 'Child name',
+            'company_type': 'company',
+            'parent_id': cls.common_ancestor.id,
+        })
+        cls.first_grandchild = partner.create({
+            'name': 'Grandchild name',
+            'company_type': 'person',
+            'parent_id': cls.first_child.id,
+        })
+        cls.second_grandchild = partner.create({
+            'name': 'Grandchild name',
+            'company_type': 'person',
+            'parent_id': cls.second_child.id,
+        })
+        cls.unrelated_partner = partner.create({
+            'name': 'Unrelated partner',
+        })
+        cls.relatives = [cls.common_ancestor, cls.first_child, cls.second_child, cls.first_grandchild,
+                     cls.second_grandchild]
+
+    @tagged('-at_install', 'post_install')
+    def testBaseCase(self):
+        for r1 in self.relatives:
+            self.assertFalse(r1.root_ancestor == self.unrelated_partner)
+            for r2 in self.relatives:
+                self.assertTrue(r1.root_ancestor == r2.root_ancestor)
+
+    @tagged('-at_install', 'post_install')
+    def testNewRelative(self):
+        new_relative = self.env['res.partner'].create({
+            'name': 'Whatever',
+            'company_type': 'person',
+            'parent_id': self.second_grandchild.id,
+        })
+        for r1 in self.relatives:
+            self.assertTrue(r1.root_ancestor == new_relative.root_ancestor)
\ No newline at end of file