diff --git a/documentcloud/addons/migrations/0029_addonrun_data.py b/documentcloud/addons/migrations/0029_addonrun_data.py
new file mode 100644
index 00000000..d346a83d
--- /dev/null
+++ b/documentcloud/addons/migrations/0029_addonrun_data.py
@@ -0,0 +1,24 @@
+# Generated by Django 4.2.2 on 2026-05-15 20:25
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("addons", "0028_addonevent_addonevent_param_site_idx"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="addonrun",
+            name="data",
+            field=models.JSONField(
+                blank=True,
+                default=dict,
+                help_text="Field to store arbitrary per-run data",
+                null=True,
+                verbose_name="data",
+            ),
+        ),
+    ]
diff --git a/documentcloud/addons/models.py b/documentcloud/addons/models.py
index eeb2937d..71884a8e 100644
--- a/documentcloud/addons/models.py
+++ b/documentcloud/addons/models.py
@@ -368,6 +368,13 @@ class AddOnRun(models.Model):
         _("updated at"),
         help_text=_("Timestamp of when the add-on run was last updated"),
     )
+    data = models.JSONField(
+        _("data"),
+        default=dict,
+        help_text=_("Field to store arbitrary per-run data"),
+        blank=True,
+        null=True,
+    )
 
     def __str__(self):
         return f"Run: {self.addon_id} - {self.created_at}"
diff --git a/documentcloud/addons/serializers.py b/documentcloud/addons/serializers.py
index 5ccfa0e1..2a355946 100644
--- a/documentcloud/addons/serializers.py
+++ b/documentcloud/addons/serializers.py
@@ -155,6 +155,7 @@ class Meta:
             "credits_spent",
             "created_at",
             "updated_at",
+            "data",
         ]
         extra_kwargs = {
             "uuid": {"read_only": True},