diff --git a/backends/vulkan/op_registry.py b/backends/vulkan/op_registry.py
index 855df9d2e74..0423805b85e 100644
--- a/backends/vulkan/op_registry.py
+++ b/backends/vulkan/op_registry.py
@@ -188,6 +188,8 @@ def register_ephemeral_ops():
         exir_ops.edge.aten.exp.default,
         exir_ops.edge.aten.gelu.default,
         exir_ops.edge.aten.hardshrink.default,
+        exir_ops.edge.aten.hardsigmoid.default,
+        exir_ops.edge.aten.hardswish.default,
         exir_ops.edge.aten.hardtanh.default,
         exir_ops.edge.aten.neg.default,
         exir_ops.edge.aten.relu.default,
diff --git a/backends/vulkan/partitioner/vulkan_partitioner.py b/backends/vulkan/partitioner/vulkan_partitioner.py
index 75475643100..d3b2737517f 100644
--- a/backends/vulkan/partitioner/vulkan_partitioner.py
+++ b/backends/vulkan/partitioner/vulkan_partitioner.py
@@ -47,6 +47,13 @@
 # pyre-ignore
 ops_not_to_decompose = [
     torch.ops.aten.upsample_nearest2d.vec,
+    # Activation ops with native Vulkan shaders that PyTorch's default
+    # decomposition table would otherwise decompose into primitive ops.
+    # The decomposed paths produce NaN/Inf on some GPUs (e.g. PowerVR)
+    # due to constant tensor loading issues in the decomposed graph.
+    torch.ops.aten.hardsigmoid.default,
+    torch.ops.aten.hardswish.default,
+    torch.ops.aten.hardshrink.default,
 ]
 
 logger: logging.Logger = logging.getLogger("")