diff --git a/src/Exceptionless.Web/Api/Handlers/EventHandler.cs b/src/Exceptionless.Web/Api/Handlers/EventHandler.cs
index eb77c82c92..cc72b79bb2 100644
--- a/src/Exceptionless.Web/Api/Handlers/EventHandler.cs
+++ b/src/Exceptionless.Web/Api/Handlers/EventHandler.cs
@@ -230,7 +230,7 @@ public async Task<Result<PagedResult<object>>> Handle(GetEventsByReferenceId mes
 
         var ti = TimeRangeParser.GetTimeInfo(null, message.Offset, timeProvider, _allowedDateFields, DefaultDateField, organizations.GetRetentionUtcCutoff(appOptions.MaximumRetentionDays, timeProvider));
         var sf = new AppFilter(organizations) { IsUserOrganizationsFilter = true };
-        return await GetInternalAsync(sf, ti, httpContext, String.Concat("reference:", message.ReferenceId), null, message.Mode, message.Page, message.Limit, message.Before, message.After, includeTotal: ShouldIncludeTotal(message.Include));
+        return await GetInternalAsync(sf, ti, httpContext, $"(reference:{message.ReferenceId} OR ref.parent:{message.ReferenceId})", null, message.Mode, message.Page, message.Limit, message.Before, message.After, includeTotal: ShouldIncludeTotal(message.Include));
     }
 
     public async Task<Result<PagedResult<object>>> Handle(GetEventsByReferenceIdAndProject message)
@@ -249,7 +249,7 @@ public async Task<Result<PagedResult<object>>> Handle(GetEventsByReferenceIdAndP
 
         var ti = TimeRangeParser.GetTimeInfo(null, message.Offset, timeProvider, _allowedDateFields, DefaultDateField, organization.GetRetentionUtcCutoff(project, appOptions.MaximumRetentionDays, timeProvider));
         var sf = new AppFilter(project, organization);
-        return await GetInternalAsync(sf, ti, httpContext, String.Concat("reference:", message.ReferenceId), null, message.Mode, message.Page, message.Limit, message.Before, message.After, includeTotal: ShouldIncludeTotal(message.Include));
+        return await GetInternalAsync(sf, ti, httpContext, $"(reference:{message.ReferenceId} OR ref.parent:{message.ReferenceId})", null, message.Mode, message.Page, message.Limit, message.Before, message.After, includeTotal: ShouldIncludeTotal(message.Include));
     }
 
     public async Task<Result<PagedResult<object>>> Handle(GetEventsBySessionId message)
diff --git a/tests/Exceptionless.Tests/Api/Endpoints/EventEndpointTests.cs b/tests/Exceptionless.Tests/Api/Endpoints/EventEndpointTests.cs
index 00be49ac24..53fa1a0bf7 100644
--- a/tests/Exceptionless.Tests/Api/Endpoints/EventEndpointTests.cs
+++ b/tests/Exceptionless.Tests/Api/Endpoints/EventEndpointTests.cs
@@ -197,6 +197,33 @@ 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