diff --git a/src/Exceptionless.Web/Controllers/EventController.cs b/src/Exceptionless.Web/Controllers/EventController.cs
index b506b3679c..61e90da185 100644
--- a/src/Exceptionless.Web/Controllers/EventController.cs
+++ b/src/Exceptionless.Web/Controllers/EventController.cs
@@ -580,7 +580,7 @@ public async Task<ActionResult<ICollection<PersistentEvent>>> GetByReferenceIdAs
 
         var ti = GetTimeInfo(null, offset, organizations.GetRetentionUtcCutoff(_appOptions.MaximumRetentionDays, _timeProvider));
         var sf = new AppFilter(organizations) { IsUserOrganizationsFilter = true };
-        return await GetInternalAsync(sf, ti, String.Concat("reference:", referenceId), null, mode, page, limit, before, after, includeTotal: ShouldIncludeTotal(include));
+        return await GetInternalAsync(sf, ti, $"(reference:{referenceId} OR ref.parent:{referenceId})", null, mode, page, limit, before, after, includeTotal: ShouldIncludeTotal(include));
     }
 
     /// <summary>
@@ -618,7 +618,7 @@ public async Task<ActionResult<ICollection<PersistentEvent>>> GetByReferenceIdAs
 
         var ti = GetTimeInfo(null, offset, organization.GetRetentionUtcCutoff(project, _appOptions.MaximumRetentionDays, _timeProvider));
         var sf = new AppFilter(project, organization);
-        return await GetInternalAsync(sf, ti, String.Concat("reference:", referenceId), null, mode, page, limit, before, after, includeTotal: ShouldIncludeTotal(include));
+        return await GetInternalAsync(sf, ti, $"(reference:{referenceId} OR ref.parent:{referenceId})", null, mode, page, limit, before, after, includeTotal: ShouldIncludeTotal(include));
     }
 
     /// <summary>
diff --git a/tests/Exceptionless.Tests/Controllers/EventControllerTests.cs b/tests/Exceptionless.Tests/Controllers/EventControllerTests.cs
index dca6b4cfaa..910154054b 100644
--- a/tests/Exceptionless.Tests/Controllers/EventControllerTests.cs
+++ b/tests/Exceptionless.Tests/Controllers/EventControllerTests.cs
@@ -113,6 +113,33 @@ public async Task GetByReferenceIdAsync_WithExistingReference_ReturnsMatchingEve
         Assert.Equal(referenceId, ev.ReferenceId);
     }
 
+    [Theory]
+    [InlineData(false)]
+    [InlineData(true)]
+    public async Task GetByReferenceIdAsync_WithOnlyParentReference_ReturnsMatchingEvents(bool projectScoped)
+    {
+        // Arrange
+        string referenceId = Guid.NewGuid().ToString("N");
+        await CreateDataAsync(d => d.Event().TestProject().Reference("parent", referenceId).Message("parent reference route"));
+        await RefreshDataAsync();
+
+        string[] paths = projectScoped
+            ? ["projects", SampleDataService.TEST_PROJECT_ID, "events", "by-ref", referenceId]
+            : ["events", "by-ref", referenceId];
+
+        // Act
+        var events = await SendRequestAsAsync<IReadOnlyCollection<PersistentEvent>>(r => r
+            .AsTestOrganizationUser()
+            .AppendPaths(paths)
+            .StatusCodeShouldBeOk()
+        );
+
+        // Assert
+        Assert.NotNull(events);
+        var ev = Assert.Single(events);
+        Assert.Equal(referenceId, ev.GetEventReference("parent"));
+    }
+
     [Fact]
     public async Task GetCountByOrganizationAsync_WithExistingEvents_ReturnsOrganizationCount()
     {
diff --git a/tests/http/events.http b/tests/http/events.http
index 271fdcaaa6..e52d3c35c1 100644
--- a/tests/http/events.http
+++ b/tests/http/events.http
@@ -71,6 +71,14 @@ Content-Type: application/json
   "reference_id": "{{referenceId}}"
 }
 
+### By ReferenceId
+GET {{apiUrl}}/events/by-ref/{{referenceId}}
+Authorization: Bearer {{token}}
+
+### By ReferenceId And Project
+GET {{apiUrl}}/projects/{{projectId}}/events/by-ref/{{referenceId}}
+Authorization: Bearer {{token}}
+
 ### Post User Description
 POST {{apiUrl}}/events/by-ref/{{referenceId}}/user-description?access_token={{clientToken}}
 Content-Type: application/json