diff --git a/stubs/psutil/@tests/stubtest_allowlist.txt b/stubs/psutil/@tests/stubtest_allowlist.txt
index 785a98e07685..0ced949877a2 100644
--- a/stubs/psutil/@tests/stubtest_allowlist.txt
+++ b/stubs/psutil/@tests/stubtest_allowlist.txt
@@ -1,6 +1,3 @@
-# TODO: missing from stub
-psutil.__all__
-
 # Stubtest does not support these platforms
 psutil._psaix
 psutil._psbsd
diff --git a/stubs/psutil/@tests/stubtest_allowlist_darwin.txt b/stubs/psutil/@tests/stubtest_allowlist_darwin.txt
index 2606ecbdf50b..f1bc464326a5 100644
--- a/stubs/psutil/@tests/stubtest_allowlist_darwin.txt
+++ b/stubs/psutil/@tests/stubtest_allowlist_darwin.txt
@@ -6,3 +6,4 @@ psutil._psutil_windows
 # not always available on ARM64, but we test there
 psutil.cpu_freq
 psutil._psosx.cpu_freq
+psutil.__all__  # cpu_freq is only added to __all__ at runtime when it is available
diff --git a/stubs/psutil/psutil/__init__.pyi b/stubs/psutil/psutil/__init__.pyi
index b49b1a1fb3d4..721f59282c7c 100644
--- a/stubs/psutil/psutil/__init__.pyi
+++ b/stubs/psutil/psutil/__init__.pyi
@@ -57,6 +57,132 @@ from psutil._common import (
 
 from . import _ntuples as _ntp
 
+__all__ = [
+    # exceptions
+    "Error",
+    "NoSuchProcess",
+    "ZombieProcess",
+    "AccessDenied",
+    "TimeoutExpired",
+    # constants
+    "version_info",
+    "__version__",
+    "STATUS_RUNNING",
+    "STATUS_IDLE",
+    "STATUS_SLEEPING",
+    "STATUS_DISK_SLEEP",
+    "STATUS_STOPPED",
+    "STATUS_TRACING_STOP",
+    "STATUS_ZOMBIE",
+    "STATUS_DEAD",
+    "STATUS_WAKING",
+    "STATUS_LOCKED",
+    "STATUS_WAITING",
+    "STATUS_PARKED",
+    "CONN_ESTABLISHED",
+    "CONN_SYN_SENT",
+    "CONN_SYN_RECV",
+    "CONN_FIN_WAIT1",
+    "CONN_FIN_WAIT2",
+    "CONN_TIME_WAIT",
+    "CONN_CLOSE",
+    "CONN_CLOSE_WAIT",
+    "CONN_LAST_ACK",
+    "CONN_LISTEN",
+    "CONN_CLOSING",
+    "CONN_NONE",
+    "AF_LINK",
+    "NIC_DUPLEX_FULL",
+    "NIC_DUPLEX_HALF",
+    "NIC_DUPLEX_UNKNOWN",
+    "POWER_TIME_UNKNOWN",
+    "POWER_TIME_UNLIMITED",
+    "BSD",
+    "FREEBSD",
+    "LINUX",
+    "NETBSD",
+    "OPENBSD",
+    "MACOS",
+    "OSX",
+    "POSIX",
+    "SUNOS",
+    "WINDOWS",
+    "AIX",
+    # classes
+    "Process",
+    "Popen",
+    # functions
+    "pid_exists",
+    "pids",
+    "process_iter",
+    "wait_procs",
+    "virtual_memory",
+    "swap_memory",
+    "cpu_times",
+    "cpu_percent",
+    "cpu_times_percent",
+    "cpu_count",
+    "cpu_stats",
+    "cpu_freq",
+    "getloadavg",
+    "net_io_counters",
+    "net_connections",
+    "net_if_addrs",
+    "net_if_stats",
+    "disk_io_counters",
+    "disk_partitions",
+    "disk_usage",
+    "sensors_battery",
+    "users",
+    "boot_time",
+    "heap_info",
+    "heap_trim",
+]
+
+if sys.platform == "linux":
+    __all__ += [
+        "PROCFS_PATH",
+        "IOPRIO_CLASS_NONE",
+        "IOPRIO_CLASS_RT",
+        "IOPRIO_CLASS_BE",
+        "IOPRIO_CLASS_IDLE",
+        "RLIMIT_AS",
+        "RLIMIT_CORE",
+        "RLIMIT_CPU",
+        "RLIMIT_DATA",
+        "RLIMIT_FSIZE",
+        "RLIMIT_LOCKS",
+        "RLIMIT_MEMLOCK",
+        "RLIMIT_MSGQUEUE",
+        "RLIMIT_NICE",
+        "RLIMIT_NOFILE",
+        "RLIMIT_NPROC",
+        "RLIMIT_RSS",
+        "RLIMIT_RTPRIO",
+        "RLIMIT_RTTIME",
+        "RLIMIT_SIGPENDING",
+        "RLIMIT_STACK",
+        "RLIM_INFINITY",
+        "sensors_temperatures",
+        "sensors_fans",
+    ]
+elif sys.platform == "win32":
+    __all__ += [
+        "win_service_iter",
+        "win_service_get",
+        "ABOVE_NORMAL_PRIORITY_CLASS",
+        "BELOW_NORMAL_PRIORITY_CLASS",
+        "HIGH_PRIORITY_CLASS",
+        "IDLE_PRIORITY_CLASS",
+        "NORMAL_PRIORITY_CLASS",
+        "REALTIME_PRIORITY_CLASS",
+        "IOPRIO_VERYLOW",
+        "IOPRIO_LOW",
+        "IOPRIO_NORMAL",
+        "IOPRIO_HIGH",
+        "CONN_DELETE_TCB",
+    ]
+
 if sys.platform == "linux":
     from ._pslinux import (
         IOPRIO_CLASS_BE as IOPRIO_CLASS_BE,