diff --git a/sitewide/userupdates.py b/sitewide/userupdates.py
new file mode 100644
index 0000000..ac44c0f
--- /dev/null
+++ b/sitewide/userupdates.py
@@ -0,0 +1,118 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file or at
+# https://developers.google.com/open-source/licenses/bsd
+
+"""Classes for user updates pages.
+
+  AbstractUserUpdatesPage: Base class for all user updates pages
+  UserUpdatesProjects: Handles displaying starred projects
+  UserUpdatesDevelopers: Handles displaying starred developers
+  UserUpdatesIndividual: Handles displaying activities by the viewed user
+"""
+from __future__ import print_function
+from __future__ import division
+from __future__ import absolute_import
+
+
+import logging
+
+import ezt
+
+from businesslogic import work_env
+from features import activities
+from framework import servlet
+from framework import urls
+from sitewide import sitewide_helpers
+
+
+class AbstractUserUpdatesPage(servlet.Servlet):
+  """Base class for user updates pages."""
+
+  _PAGE_TEMPLATE = 'sitewide/user-updates-page.ezt'
+
+  # Subclasses should override these constants.
+  _UPDATES_PAGE_URL = None
+  # What to highlight in the middle column on user updates pages - 'project',
+  # 'user', or None
+  _HIGHLIGHT = None
+  # What the ending phrase for activity titles should be - 'by_user',
+  # 'in_project', or None
+  _ENDING = None
+  _TAB_MODE = None
+
+  def GatherPageData(self, mr):
+    """Build up a dictionary of data values to use when rendering the page."""
+    # TODO(jrobbins): re-implement
+    # if self.CheckRevelationCaptcha(mr, mr.errors):
+    #   mr.viewed_user_auth.user_view.RevealEmail()
+
+    page_data = {
+        'user_tab_mode': 'st5',
+        'viewing_user_page': ezt.boolean(True),
+        'user_updates_tab_mode': self._TAB_MODE,
+        }
+
+    user_ids = self._GetUserIDsForUpdates(mr)
+    project_ids = self._GetProjectIDsForUpdates(mr)
+    page_data.update(activities.GatherUpdatesData(
+        self.services, mr, user_ids=user_ids,
+        project_ids=project_ids, ending=self._ENDING,
+        updates_page_url=self._UPDATES_PAGE_URL, highlight=self._HIGHLIGHT))
+
+    return page_data
+
+  def _GetUserIDsForUpdates(self, _mr):
+    """Returns a list of user IDs to retrieve activities from."""
+    return None  # Means any.
+
+  def _GetProjectIDsForUpdates(self, _mr):
+    """Returns a list of project IDs to retrieve activities from."""
+    return None  # Means any.
+
+
+class UserUpdatesProjects(AbstractUserUpdatesPage):
+  """Shows a page of updates from projects starred by a user."""
+
+  _UPDATES_FEED_URL = urls.USER_UPDATES_PROJECTS
+  _UPDATES_PAGE_URL = urls.USER_UPDATES_PROJECTS
+  _HIGHLIGHT = 'project'
+  _ENDING = 'by_user'
+  _TAB_MODE = 'st2'
+
+  def _GetProjectIDsForUpdates(self, mr):
+    """Returns a list of project IDs whom to retrieve activities from."""
+    with work_env.WorkEnv(mr, self.services) as we:
+      starred_projects = we.ListStarredProjects(
+          viewed_user_id=mr.viewed_user_auth.user_id)
+    return [project.project_id for project in starred_projects]
+
+
+class UserUpdatesDevelopers(AbstractUserUpdatesPage):
+  """Shows a page of updates from developers starred by a user."""
+
+  _UPDATES_FEED_URL = urls.USER_UPDATES_DEVELOPERS
+  _UPDATES_PAGE_URL = urls.USER_UPDATES_DEVELOPERS
+  _HIGHLIGHT = 'user'
+  _ENDING = 'in_project'
+  _TAB_MODE = 'st3'
+
+  def _GetUserIDsForUpdates(self, mr):
+    """Returns a list of user IDs whom to retrieve activities from."""
+    user_ids = self.services.user_star.LookupStarredItemIDs(
+        mr.cnxn, mr.viewed_user_auth.user_id)
+    logging.debug('StarredUsers: %r', user_ids)
+    return user_ids
+
+
+class UserUpdatesIndividual(AbstractUserUpdatesPage):
+  """Shows a page of updates initiated by a user."""
+
+  _UPDATES_FEED_URL = urls.USER_UPDATES_MINE + '/user'
+  _UPDATES_PAGE_URL = urls.USER_UPDATES_MINE
+  _HIGHLIGHT = 'project'
+  _TAB_MODE = 'st1'
+
+  def _GetUserIDsForUpdates(self, mr):
+    """Returns a list of user IDs whom to retrieve activities from."""
+    return [mr.viewed_user_auth.user_id]