diff --git a/.github/windows_arm64_steps/action.yml b/.github/windows_arm64_steps/action.yml
new file mode 100644
index 000000000000..8ecb3b8a0cdd
--- /dev/null
+++ b/.github/windows_arm64_steps/action.yml
@@ -0,0 +1,22 @@
+name: Build Dependencies(Win-ARM64)
+description: "Setup LLVM for Win-ARM64 builds"
+
+runs:
+  using: "composite"
+  steps:
+    - name: Install LLVM with checksum verification
+      shell: pwsh
+      run: |
+        Invoke-WebRequest https://github.com/llvm/llvm-project/releases/download/llvmorg-20.1.6/LLVM-20.1.6-woa64.exe -UseBasicParsing -OutFile LLVM-woa64.exe
+        $expectedHash = "92f69a1134e32e54b07d51c6e24d9594852f6476f32c3d70471ae00fffc2d462"
+        $fileHash = (Get-FileHash -Path "LLVM-woa64.exe" -Algorithm SHA256).Hash
+        if ($fileHash -ne $expectedHash) {
+            Write-Error "Checksum verification failed. The downloaded file may be corrupted or tampered with."
+            exit 1
+        }
+        Start-Process -FilePath ".\LLVM-woa64.exe" -ArgumentList "/S" -Wait
+        echo "C:\Program Files\LLVM\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+        echo "CC=clang-cl" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+        echo "CXX=clang-cl" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+        echo "FC=flang-new" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+
diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index 68352eb1fc7c..ab6bbb618899 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -127,11 +127,9 @@ jobs:
         with:
           architecture: 'x86'
 
-      - name: Setup MSVC arm64
+      - name: Setup LLVM for Windows ARM64
         if: ${{ matrix.buildplat[1] == 'win_arm64' }}
-        uses: bus1/cabuild/action/msdevshell@e22aba57d6e74891d059d66501b6b5aed8123c4d  # v1
-        with:
-          architecture: 'arm64'
+        uses: ./.github/windows_arm64_steps
 
       - name: pkg-config-for-win
         run: |
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index e760e37780a7..e723b787a5de 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -85,6 +85,79 @@ jobs:
       run: |
         spin test -- --timeout=600 --durations=10
 
+  python64bit_openblas_winarm64:
+    name: arm64, LPARM64 OpenBLAS
+    runs-on: windows-11-arm
+    # To enable this job on a fork, comment out:
+    if: github.repository == 'numpy/numpy'
+    strategy:
+      fail-fast: false
+      matrix:
+        compiler-pyversion:
+          - ["MSVC", "3.11"]
+          - ["Clang-cl", "3.14t-dev"]
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      with:
+        submodules: recursive
+        fetch-tags: true
+        persist-credentials: false
+
+    - name: Setup Python
+      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
+      with:
+        python-version: ${{ matrix.compiler-pyversion[1] }}
+        architecture: arm64
+
+    - name: Setup MSVC
+      if: matrix.compiler-pyversion[0] == 'MSVC'
+      uses: bus1/cabuild/action/msdevshell@e22aba57d6e74891d059d66501b6b5aed8123c4d  # v1
+      with:
+        architecture: arm64
+
+    - name: Install build dependencies from PyPI
+      run: |
+        pip install -r requirements/build_requirements.txt
+
+    - name: Install pkg-config
+      run: |
+        choco install -y --stoponfirstfailure --checksum 6004DF17818F5A6DBF19CB335CC92702 pkgconfiglite
+        echo "PKG_CONFIG_PATH=${{ github.workspace }}/.openblas" >> $env:GITHUB_ENV
+
+    - name: Install Clang-cl
+      if: matrix.compiler-pyversion[0] == 'Clang-cl'
+      uses: ./.github/windows_arm64_steps
+
+    - name: Install NumPy (MSVC)
+      if: matrix.compiler-pyversion[0] == 'MSVC'
+      run: |
+        pip install -r requirements/ci_requirements.txt
+        spin build --with-scipy-openblas=32 -j2 -- --vsenv
+
+    - name: Install NumPy (Clang-cl)
+      if: matrix.compiler-pyversion[0] == 'Clang-cl'
+      run: |
+        "[binaries]","c = 'clang-cl'","cpp = 'clang-cl'","ar = 'llvm-lib'","c_ld = 'lld-link'","cpp_ld = 'lld-link'" | Out-File $PWD/clang-cl-arm64.ini -Encoding ascii
+        pip install -r requirements/ci_requirements.txt
+        spin build --with-scipy-openblas=32 -j2 -- --vsenv --native-file=$PWD/clang-cl-arm64.ini
+
+    - name: Meson Log
+      shell: bash
+      if: ${{ failure() }}
+      run: |
+        cat build/meson-logs/meson-log.txt
+
+    - name: Install test dependencies
+      run: |
+        python -m pip install -r requirements/test_requirements.txt
+        python -m pip install threadpoolctl
+
+    - name: Run test suite
+      run: |
+        spin test -- --timeout=600 --durations=10
+
   msvc_python_no_openblas:
     name: MSVC, ${{ matrix.architecture }} Python , no BLAS
     runs-on: ${{ matrix.os }}