diff --git a/.github/scripts/release/release_lib.sh b/.github/scripts/release/release_lib.sh
index f5032073b617..fa1ac6ccedce 100644
--- a/.github/scripts/release/release_lib.sh
+++ b/.github/scripts/release/release_lib.sh
@@ -137,3 +137,25 @@ upload_s3_release() {
   aws s3 ls "s3://releases.parity.io/polkadot/${version}/" --recursive --human-readable --summarize
   echo "✅ The release should be at https://releases.parity.io/polkadot/${version}"
 }
+
+# Upload runtimes artifacts to s3 release bucket
+#
+# input: version (stable release tage.g. polkadot-stable2412 or polkadot-stable2412-rc1)
+# output: none
+upload_s3_runtimes_release_artifacts() {
+  alias aws='podman run --rm -it docker.io/paritytech/awscli -e AWS_ACCESS_KEY_ID -e AWS_SECRET_ACCESS_KEY -e AWS_BUCKET aws'
+
+  version=$1
+
+  echo "Working on version: $version "
+
+  echo "Current content, should be empty on new uploads:"
+  aws s3 ls "s3://releases.parity.io/polkadot/runtimes/(${version}/" --recursive --human-readable --summarize || true
+  echo "Content to be uploaded:"
+  artifacts="artifacts/runtimes/"
+  ls "$artifacts"
+  aws s3 sync --acl public-read "$artifacts" "s3://releases.parity.io/polkadot/runtimes/${version}/"
+  echo "Uploaded files:"
+  aws s3 ls "s3://releases.parity.io/polkadot/runtimes/${version}/" --recursive --human-readable --summarize
+  echo "✅ The release should be at https://releases.parity.io/polkadot/runtimes/${version}"
+}
diff --git a/.github/workflows/release-21_build-runtimes.yml b/.github/workflows/release-21_build-runtimes.yml
index f8513817061e..7d5e948919a0 100644
--- a/.github/workflows/release-21_build-runtimes.yml
+++ b/.github/workflows/release-21_build-runtimes.yml
@@ -38,13 +38,31 @@ jobs:
        build_opts: "--features on-chain-release-build"
        profile: production
 
-  # upload-to-s3:
-    # needs: [build-runtimes]
-    # uses: ./.github/workflows/release-reusable-s3-upload.yml
-    # with:
-    #   package: polkadot
-    #   release_tag: ${{ needs.validate-inputs.outputs.release_tag }}
-    # secrets:
-    #   AWS_DEFAULT_REGION: ${{ secrets.AWS_DEFAULT_REGION }}
-    #   AWS_RELEASE_ACCESS_KEY_ID: ${{ secrets.AWS_RELEASE_ACCESS_KEY_ID }}
-    #   AWS_RELEASE_SECRET_ACCESS_KEY: ${{ secrets.AWS_RELEASE_SECRET_ACCESS_KEY }}
+  upload-to-s3:
+    runs-on: ubuntu-latest
+    environment: release
+    env:
+      AWS_ACCESS_KEY_ID: ${{ secrets.AWS_RELEASE_ACCESS_KEY_ID }}
+      AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_RELEASE_SECRET_ACCESS_KEY }}
+      AWS_REGION: ${{ secrets.AWS_DEFAULT_REGION }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
+
+      - name: Download artifacts
+        uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
+        with:
+          path: artifacts/runtimes
+
+      - name: Configure AWS Credentials
+        uses: aws-actions/configure-aws-credentials@e3dd6a429d7300a6a4c196c26e071d42e0343502 # v4.0.2
+        with:
+          aws-access-key-id: ${{ env.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ env.AWS_SECRET_ACCESS_KEY }}
+          aws-region: ${{ env.AWS_REGION }}
+
+      - name: Upload runtimes artifacts to s3
+        run: |
+          . ./.github/scripts/release/release_lib.sh
+          upload_s3_runtimes_release_artifacts ${{ inputs.release_tag }}