diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 92e9be167..7121fdb8c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,3 +1,20 @@
+# Flow
+# Copyright 2023 Akamai Technologies, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in
+# compliance with the License.  You may obtain a copy
+# of the License at
+#
+#   https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in
+# writing, software distributed under the License is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+# CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing
+# permissions and limitations under the License.
+
 name: Flow pipeline
 
 # TODO: Code reuse somehow versus Flow-IPC workflow counterpart file?  Could apply to major parts of this file.
diff --git a/conanfile.py b/conanfile.py
index 486d21e78..1b05538d7 100644
--- a/conanfile.py
+++ b/conanfile.py
@@ -1,3 +1,20 @@
+# Flow
+# Copyright 2023 Akamai Technologies, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in
+# compliance with the License.  You may obtain a copy
+# of the License at
+#
+#   https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in
+# writing, software distributed under the License is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+# CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing
+# permissions and limitations under the License.
+
 from conan import ConanFile
 from conan.tools.cmake import CMake, cmake_layout, CMakeDeps, CMakeToolchain
 
diff --git a/src/sanitize/msan/ignore_list_clang.cfg b/src/sanitize/msan/ignore_list_clang.cfg
index 79c6227d4..e42feb09d 100644
--- a/src/sanitize/msan/ignore_list_clang.cfg
+++ b/src/sanitize/msan/ignore_list_clang.cfg
@@ -1,3 +1,20 @@
+# Flow
+# Copyright 2023 Akamai Technologies, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in
+# compliance with the License.  You may obtain a copy
+# of the License at
+#
+#   https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in
+# writing, software distributed under the License is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+# CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing
+# permissions and limitations under the License.
+
 # Current version assumption: clang-15/16/17.
 
 # boost.chrono duration global initializer => std::string uninit value (TODO: too general but...).
diff --git a/src/sanitize/tsan/suppressions_clang.cfg b/src/sanitize/tsan/suppressions_clang.cfg
index d6f8a9432..87567c567 100644
--- a/src/sanitize/tsan/suppressions_clang.cfg
+++ b/src/sanitize/tsan/suppressions_clang.cfg
@@ -1,3 +1,20 @@
+# Flow
+# Copyright 2023 Akamai Technologies, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in
+# compliance with the License.  You may obtain a copy
+# of the License at
+#
+#   https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in
+# writing, software distributed under the License is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+# CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing
+# permissions and limitations under the License.
+
 # Current version assumption: clang-15/16/17.
 
 # Had some issues matching ^ and $ in this one; leaving them out; these are very unlikely to match something