diff --git a/stl/CMakeLists.txt b/stl/CMakeLists.txt
index 6a2069bae7f..3314aab65d3 100644
--- a/stl/CMakeLists.txt
+++ b/stl/CMakeLists.txt
@@ -405,6 +405,11 @@ set(STATIC_SOURCES
     ${SOURCES_SATELLITE_CODECVT_IDS}
 )
 
+# Objs that exist in all satellite DLLs
+set(SATELLITE_DLL_SOURCES
+    ${CMAKE_CURRENT_LIST_DIR}/src/dllmain_satellite.cpp
+    )
+
 add_library(std_init_once_begin_initialize OBJECT IMPORTED)
 add_library(std_init_once_complete OBJECT IMPORTED)
 set_target_properties(std_init_once_begin_initialize PROPERTIES IMPORTED_OBJECTS "${CMAKE_CURRENT_LIST_DIR}/aliases/${VCLIBS_I386_OR_AMD64}/std_init_once_begin_initialize.obj")
@@ -440,13 +445,17 @@ function(add_stl_dlls D_SUFFIX THIS_CONFIG_DEFINITIONS THIS_CONFIG_COMPILE_OPTIO
     target_compile_definitions(msvcp${D_SUFFIX}_implib_objects PRIVATE "_DLL;${THIS_CONFIG_DEFINITIONS}")
     target_compile_options(msvcp${D_SUFFIX}_implib_objects PRIVATE "${THIS_CONFIG_COMPILE_OPTIONS};/EHsc") # No /GL!
 
+    add_library(msvcp${D_SUFFIX}_satellite_objects OBJECT ${SATELLITE_DLL_SOURCES})
+    target_compile_options(msvcp${D_SUFFIX}_satellite_objects PRIVATE "${THIS_CONFIG_COMPILE_OPTIONS};${GL_FLAG};/EHsc")
+    target_compile_definitions(msvcp${D_SUFFIX}_satellite_objects PRIVATE "_DLL;${THIS_CONFIG_DEFINITIONS}")
+
     # msvcp140_1.dll (the memory_resource satellite)
     add_library(msvcp_1${D_SUFFIX}_objects OBJECT ${SOURCES_SATELLITE_1})
     target_compile_definitions(msvcp_1${D_SUFFIX}_objects PRIVATE "_BUILDING_SATELLITE_1;_DLL;${THIS_CONFIG_DEFINITIONS}")
     target_compile_options(msvcp_1${D_SUFFIX}_objects PRIVATE "${THIS_CONFIG_COMPILE_OPTIONS};${GL_FLAG};/EHsc")
 
     add_library(msvcp_1${D_SUFFIX} SHARED)
-    target_link_libraries(msvcp_1${D_SUFFIX} PRIVATE msvcp_1${D_SUFFIX}_objects "msvcp${D_SUFFIX}" "${TOOLSET_LIB}/vcruntime${D_SUFFIX}.lib" "${TOOLSET_LIB}/msvcrt${D_SUFFIX}.lib" "ucrt${D_SUFFIX}.lib")
+    target_link_libraries(msvcp_1${D_SUFFIX} PRIVATE msvcp_1${D_SUFFIX}_objects msvcp${D_SUFFIX}_satellite_objects "msvcp${D_SUFFIX}" "${TOOLSET_LIB}/vcruntime${D_SUFFIX}.lib" "${TOOLSET_LIB}/msvcrt${D_SUFFIX}.lib" "ucrt${D_SUFFIX}.lib")
     set_target_properties(msvcp_1${D_SUFFIX} PROPERTIES ARCHIVE_OUTPUT_NAME "msvcp140_1${D_SUFFIX}${VCLIBS_SUFFIX}")
     set_target_properties(msvcp_1${D_SUFFIX} PROPERTIES ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
     set_target_properties(msvcp_1${D_SUFFIX} PROPERTIES OUTPUT_NAME "msvcp140_1${D_SUFFIX}${VCLIBS_SUFFIX}")
@@ -459,7 +468,7 @@ function(add_stl_dlls D_SUFFIX THIS_CONFIG_DEFINITIONS THIS_CONFIG_COMPILE_OPTIO
     target_link_libraries(msvcp_2${D_SUFFIX}_objects PRIVATE Boost::headers Boost::disable_autolinking)
 
     add_library(msvcp_2${D_SUFFIX} SHARED)
-    target_link_libraries(msvcp_2${D_SUFFIX} PRIVATE msvcp_2${D_SUFFIX}_objects msvcp${D_SUFFIX}_implib_objects std_init_once_begin_initialize std_init_once_complete "msvcp${D_SUFFIX}" "${TOOLSET_LIB}/vcruntime${D_SUFFIX}.lib" "${TOOLSET_LIB}/msvcrt${D_SUFFIX}.lib" "ucrt${D_SUFFIX}.lib")
+    target_link_libraries(msvcp_2${D_SUFFIX} PRIVATE msvcp_2${D_SUFFIX}_objects msvcp${D_SUFFIX}_satellite_objects msvcp${D_SUFFIX}_implib_objects std_init_once_begin_initialize std_init_once_complete "msvcp${D_SUFFIX}" "${TOOLSET_LIB}/vcruntime${D_SUFFIX}.lib" "${TOOLSET_LIB}/msvcrt${D_SUFFIX}.lib" "ucrt${D_SUFFIX}.lib")
     set_target_properties(msvcp_2${D_SUFFIX} PROPERTIES ARCHIVE_OUTPUT_NAME "msvcp140_2${D_SUFFIX}${VCLIBS_SUFFIX}")
     set_target_properties(msvcp_2${D_SUFFIX} PROPERTIES ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
     set_target_properties(msvcp_2${D_SUFFIX} PROPERTIES OUTPUT_NAME "msvcp140_2${D_SUFFIX}${VCLIBS_SUFFIX}")
@@ -481,7 +490,7 @@ function(add_stl_dlls D_SUFFIX THIS_CONFIG_DEFINITIONS THIS_CONFIG_COMPILE_OPTIO
     file(WRITE "${_ATOMIC_WAIT_DEF_NAME}" "${_ATOMIC_WAIT_DEF_CONTENTS}")
 
     add_library(msvcp${D_SUFFIX}_atomic_wait SHARED "${_ATOMIC_WAIT_DEF_NAME}")
-    target_link_libraries(msvcp${D_SUFFIX}_atomic_wait PRIVATE msvcp${D_SUFFIX}_atomic_wait_objects "msvcp${D_SUFFIX}" "${TOOLSET_LIB}/vcruntime${D_SUFFIX}.lib" "${TOOLSET_LIB}/msvcrt${D_SUFFIX}.lib" "ucrt${D_SUFFIX}.lib")
+    target_link_libraries(msvcp${D_SUFFIX}_atomic_wait PRIVATE msvcp${D_SUFFIX}_atomic_wait_objects msvcp${D_SUFFIX}_satellite_objects "msvcp${D_SUFFIX}" "${TOOLSET_LIB}/vcruntime${D_SUFFIX}.lib" "${TOOLSET_LIB}/msvcrt${D_SUFFIX}.lib" "ucrt${D_SUFFIX}.lib")
     set_target_properties(msvcp${D_SUFFIX}_atomic_wait PROPERTIES ARCHIVE_OUTPUT_NAME "msvcp140_atomic_wait${D_SUFFIX}${VCLIBS_SUFFIX}")
     set_target_properties(msvcp${D_SUFFIX}_atomic_wait PROPERTIES ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
     set_target_properties(msvcp${D_SUFFIX}_atomic_wait PROPERTIES OUTPUT_NAME "${_ATOMIC_WAIT_OUTPUT_NAME}")
@@ -493,7 +502,7 @@ function(add_stl_dlls D_SUFFIX THIS_CONFIG_DEFINITIONS THIS_CONFIG_COMPILE_OPTIO
     target_compile_options(msvcp${D_SUFFIX}_codecvt_ids_objects PRIVATE "${THIS_CONFIG_COMPILE_OPTIONS};${GL_FLAG};/EHsc")
 
     add_library(msvcp${D_SUFFIX}_codecvt_ids SHARED)
-    target_link_libraries(msvcp${D_SUFFIX}_codecvt_ids PRIVATE msvcp${D_SUFFIX}_codecvt_ids_objects "msvcp${D_SUFFIX}" "${TOOLSET_LIB}/vcruntime${D_SUFFIX}.lib" "${TOOLSET_LIB}/msvcrt${D_SUFFIX}.lib" "ucrt${D_SUFFIX}.lib")
+    target_link_libraries(msvcp${D_SUFFIX}_codecvt_ids PRIVATE msvcp${D_SUFFIX}_codecvt_ids_objects msvcp${D_SUFFIX}_satellite_objects "msvcp${D_SUFFIX}" "${TOOLSET_LIB}/vcruntime${D_SUFFIX}.lib" "${TOOLSET_LIB}/msvcrt${D_SUFFIX}.lib" "ucrt${D_SUFFIX}.lib")
     set_target_properties(msvcp${D_SUFFIX}_codecvt_ids PROPERTIES ARCHIVE_OUTPUT_NAME "msvcp140_codecvt_ids${D_SUFFIX}${VCLIBS_SUFFIX}")
     set_target_properties(msvcp${D_SUFFIX}_codecvt_ids PROPERTIES ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
     set_target_properties(msvcp${D_SUFFIX}_codecvt_ids PROPERTIES OUTPUT_NAME "msvcp140${D_SUFFIX}_codecvt_ids${VCLIBS_SUFFIX}")
diff --git a/stl/msbuild/stl_1/stl_1.files.settings.targets b/stl/msbuild/stl_1/stl_1.files.settings.targets
index d186b4e07aa..8c423bd34ec 100644
--- a/stl/msbuild/stl_1/stl_1.files.settings.targets
+++ b/stl/msbuild/stl_1/stl_1.files.settings.targets
@@ -11,6 +11,11 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
             ">
             <BuildAs>nativecpp</BuildAs>
         </BuildFiles>
+        <BuildFiles Condition="'$(CrtBuildModelIsDll)' == 'true'" Include="
+            $(CrtRoot)\github\stl\src\dllmain_satellite.cpp;
+            ">
+            <BuildAs>nativecpp</BuildAs>
+        </BuildFiles>
     </ItemGroup>
 
     <Choose>
diff --git a/stl/msbuild/stl_2/stl_2.files.settings.targets b/stl/msbuild/stl_2/stl_2.files.settings.targets
index 9492e7032a3..4f28e08a72d 100644
--- a/stl/msbuild/stl_2/stl_2.files.settings.targets
+++ b/stl/msbuild/stl_2/stl_2.files.settings.targets
@@ -11,6 +11,11 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
             ">
             <BuildAs>nativecpp</BuildAs>
         </BuildFiles>
+        <BuildFiles Condition="'$(CrtBuildModelIsDll)' == 'true'" Include="
+            $(CrtRoot)\github\stl\src\dllmain_satellite.cpp;
+            ">
+            <BuildAs>nativecpp</BuildAs>
+        </BuildFiles>
     </ItemGroup>
 
     <Choose>
diff --git a/stl/msbuild/stl_atomic_wait/stl_atomic_wait.files.settings.targets b/stl/msbuild/stl_atomic_wait/stl_atomic_wait.files.settings.targets
index 0de6759e9cd..e7cc52c398d 100644
--- a/stl/msbuild/stl_atomic_wait/stl_atomic_wait.files.settings.targets
+++ b/stl/msbuild/stl_atomic_wait/stl_atomic_wait.files.settings.targets
@@ -11,5 +11,10 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
             ">
             <BuildAs>nativecpp</BuildAs>
         </BuildFiles>
+        <BuildFiles Condition="'$(CrtBuildModelIsDll)' == 'true'" Include="
+            $(CrtRoot)\github\stl\src\dllmain_satellite.cpp;
+            ">
+            <BuildAs>nativecpp</BuildAs>
+        </BuildFiles>
     </ItemGroup>
 </Project>
diff --git a/stl/msbuild/stl_codecvt_ids/stl_codecvt_ids.files.settings.targets b/stl/msbuild/stl_codecvt_ids/stl_codecvt_ids.files.settings.targets
index 48cae4bf3fc..b4a50d87ea3 100644
--- a/stl/msbuild/stl_codecvt_ids/stl_codecvt_ids.files.settings.targets
+++ b/stl/msbuild/stl_codecvt_ids/stl_codecvt_ids.files.settings.targets
@@ -11,6 +11,11 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
             ">
             <BuildAs>nativecpp</BuildAs>
         </BuildFiles>
+        <BuildFiles Condition="'$(CrtBuildModelIsDll)' == 'true'" Include="
+            $(CrtRoot)\github\stl\src\dllmain_satellite.cpp;
+            ">
+            <BuildAs>nativecpp</BuildAs>
+        </BuildFiles>
     </ItemGroup>
 
     <Choose>
diff --git a/stl/src/dllmain_satellite.cpp b/stl/src/dllmain_satellite.cpp
new file mode 100644
index 00000000000..af2e024c1fe
--- /dev/null
+++ b/stl/src/dllmain_satellite.cpp
@@ -0,0 +1,16 @@
+// Copyright (c) Microsoft Corporation.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+#include <Windows.h>
+
+// DllMain for 'satellite' DLLs which don't need TLS.
+
+extern "C" BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID) {
+    if (ul_reason_for_call == DLL_PROCESS_ATTACH) {
+        if (!DisableThreadLibraryCalls(hModule)) {
+            return FALSE;
+        }
+    }
+
+    return TRUE;
+}