diff --git a/tracer/src/Datadog.Trace.BenchmarkDotNet/DatadogExporter.cs b/tracer/src/Datadog.Trace.BenchmarkDotNet/DatadogExporter.cs
index 7eefae01e..4afa7892f 100644
--- a/tracer/src/Datadog.Trace.BenchmarkDotNet/DatadogExporter.cs
+++ b/tracer/src/Datadog.Trace.BenchmarkDotNet/DatadogExporter.cs
@@ -3,6 +3,8 @@
 // This product includes software developed at Datadog (https://www.datadoghq.com/). Copyright 2017 Datadog, Inc.
 // </copyright>
 
+// Modified by Splunk Inc.
+
 using System;
 using System.Collections.Generic;
 using System.Threading;
diff --git a/tracer/src/Datadog.Trace.Coverage.collector/AssemblyProcessor.cs b/tracer/src/Datadog.Trace.Coverage.collector/AssemblyProcessor.cs
index f984fe79f..12f0e4a92 100644
--- a/tracer/src/Datadog.Trace.Coverage.collector/AssemblyProcessor.cs
+++ b/tracer/src/Datadog.Trace.Coverage.collector/AssemblyProcessor.cs
@@ -3,6 +3,8 @@
 // This product includes software developed at Datadog (https://www.datadoghq.com/). Copyright 2017 Datadog, Inc.
 // </copyright>
 
+// Modified by Splunk Inc.
+
 using System;
 using System.Collections.Generic;
 using System.Globalization;
diff --git a/tracer/src/Datadog.Trace/Ci/Agent/Payloads/CICodeCoveragePayload.cs b/tracer/src/Datadog.Trace/Ci/Agent/Payloads/CICodeCoveragePayload.cs
index 62fb18ab6..acb5a8ee7 100644
--- a/tracer/src/Datadog.Trace/Ci/Agent/Payloads/CICodeCoveragePayload.cs
+++ b/tracer/src/Datadog.Trace/Ci/Agent/Payloads/CICodeCoveragePayload.cs
@@ -3,6 +3,8 @@
 // This product includes software developed at Datadog (https://www.datadoghq.com/). Copyright 2017 Datadog, Inc.
 // </copyright>
 
+// Modified by Splunk Inc.
+
 using System;
 using System.Text;
 using Datadog.Trace.Agent;
diff --git a/tracer/src/Datadog.Trace/Ci/Agent/Payloads/CITestCyclePayload.cs b/tracer/src/Datadog.Trace/Ci/Agent/Payloads/CITestCyclePayload.cs
index 28c18fac7..c6796b18e 100644
--- a/tracer/src/Datadog.Trace/Ci/Agent/Payloads/CITestCyclePayload.cs
+++ b/tracer/src/Datadog.Trace/Ci/Agent/Payloads/CITestCyclePayload.cs
@@ -3,6 +3,8 @@
 // This product includes software developed at Datadog (https://www.datadoghq.com/). Copyright 2017 Datadog, Inc.
 // </copyright>
 
+// Modified by Splunk Inc.
+
 using System;
 using Datadog.Trace.Ci.EventModel;
 using Datadog.Trace.Vendors.MessagePack;
diff --git a/tracer/src/Datadog.Trace/HttpOverStreams/DatadogHttpClient.cs b/tracer/src/Datadog.Trace/HttpOverStreams/DatadogHttpClient.cs
index 455e17b5b..c7df336d0 100644
--- a/tracer/src/Datadog.Trace/HttpOverStreams/DatadogHttpClient.cs
+++ b/tracer/src/Datadog.Trace/HttpOverStreams/DatadogHttpClient.cs
@@ -3,6 +3,8 @@
 // This product includes software developed at Datadog (https://www.datadoghq.com/). Copyright 2017 Datadog, Inc.
 // </copyright>
 
+// Modified by Splunk Inc.
+
 using System;
 using System.IO;
 using System.Text;
diff --git a/tracer/src/Datadog.Trace/Logging/DirectSubmission/DirectLogSubmissionManager.cs b/tracer/src/Datadog.Trace/Logging/DirectSubmission/DirectLogSubmissionManager.cs
index 51b579ed2..a459a7fa6 100644
--- a/tracer/src/Datadog.Trace/Logging/DirectSubmission/DirectLogSubmissionManager.cs
+++ b/tracer/src/Datadog.Trace/Logging/DirectSubmission/DirectLogSubmissionManager.cs
@@ -2,6 +2,9 @@
 // Unless explicitly stated otherwise all files in this repository are licensed under the Apache 2 License.
 // This product includes software developed at Datadog (https://www.datadoghq.com/). Copyright 2017 Datadog, Inc.
 // </copyright>
+
+// Modified by Splunk Inc.
+
 #nullable enable
 
 using System;
diff --git a/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/AerospikeTests.cs b/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/AerospikeTests.cs
index 5ea4ec2d4..7da5fdec1 100644
--- a/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/AerospikeTests.cs
+++ b/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/AerospikeTests.cs
@@ -3,6 +3,8 @@
 // This product includes software developed at Datadog (https://www.datadoghq.com/). Copyright 2017 Datadog, Inc.
 // </copyright>
 
+// Modified by Splunk Inc.
+
 using System;
 using System.Threading.Tasks;
 using Datadog.Trace.Configuration;
diff --git a/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/GrpcTests.cs b/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/GrpcTests.cs
index 2ec25df4f..c5e29bf29 100644
--- a/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/GrpcTests.cs
+++ b/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/GrpcTests.cs
@@ -3,6 +3,8 @@
 // This product includes software developed at Datadog (https://www.datadoghq.com/). Copyright 2017 Datadog, Inc.
 // </copyright>
 
+// Modified by Splunk Inc.
+
 using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
diff --git a/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/TraceAnnotationsTests.cs b/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/TraceAnnotationsTests.cs
index 43848d47c..c740b5a3c 100644
--- a/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/TraceAnnotationsTests.cs
+++ b/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/TraceAnnotationsTests.cs
@@ -3,6 +3,8 @@
 // This product includes software developed at Datadog (https://www.datadoghq.com/). Copyright 2017 Datadog, Inc.
 // </copyright>
 
+// Modified by Splunk Inc.
+
 #pragma warning disable SA1402 // File may only contain a single class
 #pragma warning disable SA1649 // File name must match first type name
 
diff --git a/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/TransportTests.cs b/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/TransportTests.cs
index d4bb9b51a..ade580dfa 100644
--- a/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/TransportTests.cs
+++ b/tracer/test/Datadog.Trace.ClrProfiler.IntegrationTests/TransportTests.cs
@@ -3,6 +3,8 @@
 // This product includes software developed at Datadog (https://www.datadoghq.com/). Copyright 2017 Datadog, Inc.
 // </copyright>
 
+// Modified by Splunk Inc.
+
 using System;
 using System.Collections.Generic;
 using System.IO;