diff --git a/examples/asynchronous_sleep.cpp b/examples/asynchronous_sleep.cpp
index 6e35acfd..4973e4a2 100644
--- a/examples/asynchronous_sleep.cpp
+++ b/examples/asynchronous_sleep.cpp
@@ -1,3 +1,18 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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.
+ */
 
 #include <chrono>
 #include <iostream>
diff --git a/examples/synchronous_sleep.cpp b/examples/synchronous_sleep.cpp
index db8daf0d..543b5940 100644
--- a/examples/synchronous_sleep.cpp
+++ b/examples/synchronous_sleep.cpp
@@ -1,3 +1,18 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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.
+ */
 
 #include <chrono>
 #include <iostream>
diff --git a/include/unifex/async_auto_reset_event.hpp b/include/unifex/async_auto_reset_event.hpp
index a342634b..f73c2130 100644
--- a/include/unifex/async_auto_reset_event.hpp
+++ b/include/unifex/async_auto_reset_event.hpp
@@ -1,4 +1,18 @@
-// (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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.
+ */
 
 #pragma once
 
@@ -140,7 +154,8 @@ struct async_auto_reset_event::stream_view final {
                 typename stop_token_t::template callback_type<
                     decltype(stopCallback)>;
 
-            return std::optional<stop_callback_t>{std::in_place, stopToken, stopCallback};
+            return std::optional<stop_callback_t>{
+                std::in_place, stopToken, stopCallback};
           },
           [evt](auto& stopCallback) noexcept {
             return unifex::let_value(
diff --git a/include/unifex/cleanup_adapt_stream.hpp b/include/unifex/cleanup_adapt_stream.hpp
index 0bfcb24c..59466e9b 100644
--- a/include/unifex/cleanup_adapt_stream.hpp
+++ b/include/unifex/cleanup_adapt_stream.hpp
@@ -1,4 +1,18 @@
-// (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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.
+ */
 
 #pragma once
 
@@ -45,7 +59,7 @@ inline constexpr struct _fn final {
       std::is_nothrow_constructible_v<remove_cvref_t<Stream>, Stream>&&
           std::is_nothrow_constructible_v<std::decay_t<AdaptFunc>, AdaptFunc>) {
     return _cleanup_adapt::stream<Stream, AdaptFunc>{
-        (Stream &&) stream, (AdaptFunc &&) adapt};
+        (Stream&&)stream, (AdaptFunc&&)adapt};
   }
 } cleanup_adapt_stream{};
 }  // namespace _cleanup_adapt_cpo
diff --git a/include/unifex/upon_done.hpp b/include/unifex/upon_done.hpp
index bae13ba4..eb7c1c5e 100644
--- a/include/unifex/upon_done.hpp
+++ b/include/unifex/upon_done.hpp
@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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.
+ */
+
 #pragma once
 
 #include <unifex/config.hpp>
@@ -184,7 +200,7 @@ struct _sender<Predecessor, Func>::type {
                member_t<Sender, Predecessor>,
                receiver_t<remove_cvref_t<Receiver>>>)  //
       friend auto tag_invoke(tag_t<unifex::connect>, Sender&& s, Receiver&& r) noexcept(
-          std::is_nothrow_constructible_v<remove_cvref_t<Receiver>, Receiver> &&
+	  std::is_nothrow_constructible_v<remove_cvref_t<Receiver>, Receiver> &&
           std::is_nothrow_constructible_v<Func, member_t<Sender, Func>> &&
           is_nothrow_connectable_v<
               member_t<Sender, Predecessor>,
diff --git a/include/unifex/upon_error.hpp b/include/unifex/upon_error.hpp
index b061a6cd..6aad5427 100644
--- a/include/unifex/upon_error.hpp
+++ b/include/unifex/upon_error.hpp
@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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.
+ */
+
 #pragma once
 
 #include <unifex/config.hpp>
@@ -164,7 +180,7 @@ struct _sender<Predecessor, Func>::type {
                member_t<Sender, Predecessor>,
                receiver_t<remove_cvref_t<Receiver>>>)  //
       friend auto tag_invoke(tag_t<unifex::connect>, Sender&& s, Receiver&& r) noexcept(
-          std::is_nothrow_constructible_v<remove_cvref_t<Receiver>, Receiver> &&
+	  std::is_nothrow_constructible_v<remove_cvref_t<Receiver>, Receiver> &&
           std::is_nothrow_constructible_v<Func, member_t<Sender, Func>> &&
           is_nothrow_connectable_v<
               member_t<Sender, Predecessor>,
diff --git a/source/async_auto_reset_event.cpp b/source/async_auto_reset_event.cpp
index b9b68c28..66eddc5c 100644
--- a/source/async_auto_reset_event.cpp
+++ b/source/async_auto_reset_event.cpp
@@ -1,4 +1,18 @@
-// (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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.
+ */
 
 #include <unifex/async_auto_reset_event.hpp>
 
diff --git a/test/async_auto_reset_event_test.cpp b/test/async_auto_reset_event_test.cpp
index 3c14b0df..6007cca1 100644
--- a/test/async_auto_reset_event_test.cpp
+++ b/test/async_auto_reset_event_test.cpp
@@ -1,4 +1,18 @@
-// (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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.
+ */
 
 #include <gtest/gtest.h>
 
diff --git a/test/detach_on_cancel_test.cpp b/test/detach_on_cancel_test.cpp
index 4e0bc83b..9da9d7a1 100644
--- a/test/detach_on_cancel_test.cpp
+++ b/test/detach_on_cancel_test.cpp
@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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.
+ */
+
 #include <unifex/async_manual_reset_event.hpp>
 #include <unifex/async_scope.hpp>
 #include <unifex/detach_on_cancel.hpp>
diff --git a/test/filter_stream_test.cpp b/test/filter_stream_test.cpp
index 1110a994..3fc75c6e 100644
--- a/test/filter_stream_test.cpp
+++ b/test/filter_stream_test.cpp
@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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.
+ */
+
 #include <unifex/filter_stream.hpp>
 
 #include <unifex/for_each.hpp>
diff --git a/test/type_list_test.cpp b/test/type_list_test.cpp
index 6ce2ad0e..93e58e30 100644
--- a/test/type_list_test.cpp
+++ b/test/type_list_test.cpp
@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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.
+ */
+
 #include <unifex/type_list.hpp>
 
 using namespace unifex;
diff --git a/test/upon_done_test.cpp b/test/upon_done_test.cpp
index 167018a9..02b13d99 100644
--- a/test/upon_done_test.cpp
+++ b/test/upon_done_test.cpp
@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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.
+ */
+
 #include <unifex/upon_done.hpp>
 
 #include <unifex/just.hpp>
diff --git a/test/upon_error_test.cpp b/test/upon_error_test.cpp
index 1d550016..ac9e1e66 100644
--- a/test/upon_error_test.cpp
+++ b/test/upon_error_test.cpp
@@ -1,3 +1,19 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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.
+ */
+
 #include <unifex/upon_error.hpp>
 
 #include <unifex/just.hpp>
diff --git a/test/when_all_range_test.cpp b/test/when_all_range_test.cpp
index 011d81f1..43c98681 100644
--- a/test/when_all_range_test.cpp
+++ b/test/when_all_range_test.cpp
@@ -1,4 +1,18 @@
-// (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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
+ *
+ *     http://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.
+ */
 
 #include <gtest/gtest.h>