diff --git a/web/modals/threads/members/add-members-list.react.js b/web/modals/threads/members/add-members-list.react.js
new file mode 100644
--- /dev/null
+++ b/web/modals/threads/members/add-members-list.react.js
@@ -0,0 +1,75 @@
+// @flow
+
+import _groupBy from 'lodash/fp/groupBy';
+import _toPairs from 'lodash/fp/toPairs';
+import * as React from 'react';
+
+import type { UserListItem } from 'lib/types/user-types';
+
+import AddMembersItemGroup from './add-members-group.react';
+
+type Props = {
+  +userListItems: $ReadOnlyArray<UserListItem>,
+  +pendingUsersToAdd: $ReadOnly<Set<string>>,
+  +switchUser: string => void,
+};
+
+function AddMembersList(props: Props): React.Node {
+  const { userListItems, pendingUsersToAdd, switchUser } = props;
+
+  const usersAvailableToAdd = React.useMemo(
+    () => userListItems.filter(user => !user.alertTitle),
+    [userListItems],
+  );
+
+  const groupedAvailableUsersList = React.useMemo(
+    () => _groupBy(userInfo => userInfo.notice)(usersAvailableToAdd),
+    [usersAvailableToAdd],
+  );
+
+  const membersInParentThread = React.useMemo(
+    () =>
+      groupedAvailableUsersList['undefined']
+        ? ['Users in parent channel', groupedAvailableUsersList['undefined']]
+        : undefined,
+    [groupedAvailableUsersList],
+  );
+
+  const membersNotInParentThread = React.useMemo(
+    () =>
+      _toPairs(groupedAvailableUsersList)
+        .filter(group => group[0] !== 'undefined')
+        .sort((a, b) => a[0].localeCompare(b[0])),
+    [groupedAvailableUsersList],
+  );
+
+  const usersUnavailableToAdd = React.useMemo(() => {
+    const usersUnavailable = userListItems.filter(user => user.alertTitle);
+    if (!usersUnavailable.length) {
+      return null;
+    }
+    return ['Unavailable users', usersUnavailable];
+  }, [userListItems]);
+
+  const sortedGroupedUsersList = React.useMemo(
+    () =>
+      [
+        membersInParentThread,
+        ...membersNotInParentThread,
+        usersUnavailableToAdd,
+      ].filter(Boolean),
+    [membersInParentThread, membersNotInParentThread, usersUnavailableToAdd],
+  );
+
+  return sortedGroupedUsersList.map(([header, userInfos]) => (
+    <AddMembersItemGroup
+      key={header}
+      header={header}
+      userInfos={userInfos}
+      onUserClick={switchUser}
+      usersAdded={pendingUsersToAdd}
+    />
+  ));
+}
+
+export default AddMembersList;