diff --git a/src/numpy-stubs/_core/_simd.pyi b/src/numpy-stubs/_core/_simd.pyi
index 87b2aaa5..efa905b2 100644
--- a/src/numpy-stubs/_core/_simd.pyi
+++ b/src/numpy-stubs/_core/_simd.pyi
@@ -1,28 +1,43 @@
-import sys
 from types import ModuleType
-from typing import TypedDict, type_check_only
+from typing import Required, TypedDict, type_check_only
 
-# NOTE: these 6 are only defined on systems with an intel processor
+# NOTE: these are only defined on (some) systems with an intel processor
 SSE42: ModuleType | None = ...
 FMA3: ModuleType | None = ...
 AVX2: ModuleType | None = ...
 AVX512F: ModuleType | None = ...
 AVX512_SKX: ModuleType | None = ...
-if sys.platform == "linux":
-    X86_V4: ModuleType | None = ...
+X86_V3: ModuleType | None = ...
+X86_V4: ModuleType | None = ...
+
+# NOTE: these 2 are only defined on systems with an arm processor
+ASIMD: ModuleType | None = ...
+NEON: ModuleType | None = ...
+
+# NOTE: This is only defined on systems with an riscv64 processor.
+RVV: ModuleType | None = ...
 
 baseline: ModuleType | None = ...
 
 @type_check_only
-class SimdTargets(TypedDict):
+class SimdTargets(TypedDict, total=False):
+    # x86
     SSE42: ModuleType | None
     AVX2: ModuleType | None
     FMA3: ModuleType | None
     AVX512F: ModuleType | None
     AVX512_SKX: ModuleType | None
+    X86_V3: ModuleType | None
     X86_V4: ModuleType | None
 
-    baseline: ModuleType | None
+    # ARM
+    ASIMD: ModuleType | None
+    NEON: ModuleType | None
+
+    # RISC-V
+    RVV: ModuleType | None
+
+    baseline: Required[ModuleType | None]
 
 targets: SimdTargets = ...
 
diff --git a/tool/allowlists/common.txt b/tool/allowlists/common.txt
index 7e077d5e..f1a35463 100644
--- a/tool/allowlists/common.txt
+++ b/tool/allowlists/common.txt
@@ -13,6 +13,9 @@ numpy(\.\w+)?\.tests.*
 numpy(\..+)?\.float(96|128)
 numpy(\..+)?\.complex(192|256)
 
+# system-dependent private SIMD submodules
+numpy\._core\._simd\.(SSE42|FMA3|AVX(2|512F|512_SKX)|X86_V(3|4)|ASIMD|NEON|RVV)
+
 # these are always either missing float96/complex192 or float128/complex256
 numpy\.__all__
 numpy\._?core\.__all__
diff --git a/tool/allowlists/simd.txt b/tool/allowlists/simd.txt
deleted file mode 100644
index 6f65e6fa..00000000
--- a/tool/allowlists/simd.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-# only defined on systems with an intel processor
-numpy\._core\._simd\.SSE42
-numpy\._core\._simd\.FMA3
-numpy\._core\._simd\.AVX2
-numpy\._core\._simd\.AVX512F
-numpy\._core\._simd\.AVX512_SKX
-# numpy\._core\._simd\.X86_V4
diff --git a/tool/stubtest.py b/tool/stubtest.py
index c4eacab9..48a8b238 100644
--- a/tool/stubtest.py
+++ b/tool/stubtest.py
@@ -46,19 +46,6 @@
 ALLOWLISTS = ["common.txt", f"py3{sys.version_info.minor}.txt"]
 
 
-def __check_simd() -> None:
-    try:
-        from numpy._core import _simd  # noqa: PLC0415, PLC2701
-    except ImportError:
-        return
-
-    if not hasattr(_simd, "AVX512F"):
-        ALLOWLISTS.append("simd.txt")
-
-
-__check_simd()
-
-
 def _allowlists() -> list[str]:
     relpath = (TOOL_DIR / "allowlists").relative_to(CWD)
     return [str(relpath / fname) for fname in ALLOWLISTS]