diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -2188,6 +2188,7 @@
     'PhabricatorPasteTransactionQuery' => 'applications/paste/query/PhabricatorPasteTransactionQuery.php',
     'PhabricatorPasteViewController' => 'applications/paste/controller/PhabricatorPasteViewController.php',
     'PhabricatorPathSetupCheck' => 'applications/config/check/PhabricatorPathSetupCheck.php',
+    'PhabricatorPeopleAnyOwnerDatasource' => 'applications/people/typeahead/PhabricatorPeopleAnyOwnerDatasource.php',
     'PhabricatorPeopleApplication' => 'applications/people/application/PhabricatorPeopleApplication.php',
     'PhabricatorPeopleApproveController' => 'applications/people/controller/PhabricatorPeopleApproveController.php',
     'PhabricatorPeopleCalendarController' => 'applications/people/controller/PhabricatorPeopleCalendarController.php',
@@ -5560,6 +5561,7 @@
     'PhabricatorPasteTransactionQuery' => 'PhabricatorApplicationTransactionQuery',
     'PhabricatorPasteViewController' => 'PhabricatorPasteController',
     'PhabricatorPathSetupCheck' => 'PhabricatorSetupCheck',
+    'PhabricatorPeopleAnyOwnerDatasource' => 'PhabricatorTypeaheadDatasource',
     'PhabricatorPeopleApplication' => 'PhabricatorApplication',
     'PhabricatorPeopleApproveController' => 'PhabricatorPeopleController',
     'PhabricatorPeopleCalendarController' => 'PhabricatorPeopleController',
diff --git a/src/applications/maniphest/query/ManiphestTaskQuery.php b/src/applications/maniphest/query/ManiphestTaskQuery.php
--- a/src/applications/maniphest/query/ManiphestTaskQuery.php
+++ b/src/applications/maniphest/query/ManiphestTaskQuery.php
@@ -10,7 +10,8 @@
   private $taskPHIDs           = array();
   private $authorPHIDs         = array();
   private $ownerPHIDs          = array();
-  private $includeUnowned      = null;
+  private $noOwner;
+  private $anyOwner;
   private $subscriberPHIDs     = array();
   private $dateCreatedAfter;
   private $dateCreatedBefore;
@@ -70,11 +71,16 @@
 
   public function withOwners(array $owners) {
     $no_owner = PhabricatorPeopleNoOwnerDatasource::FUNCTION_TOKEN;
+    $any_owner = PhabricatorPeopleAnyOwnerDatasource::FUNCTION_TOKEN;
 
-    $this->includeUnowned = false;
     foreach ($owners as $k => $phid) {
       if ($phid === $no_owner || $phid === null) {
-        $this->includeUnowned = true;
+        $this->noOwner = true;
+        unset($owners[$k]);
+        break;
+      }
+      if ($phid === $any_owner) {
+        $this->anyOwner = true;
         unset($owners[$k]);
         break;
       }
@@ -512,31 +518,32 @@
   }
 
   private function buildOwnerWhereClause(AphrontDatabaseConnection $conn) {
-    if (!$this->ownerPHIDs) {
-      if ($this->includeUnowned === null) {
-        return null;
-      } else if ($this->includeUnowned) {
-        return qsprintf(
-          $conn,
-          'task.ownerPHID IS NULL');
-      } else {
-        return qsprintf(
-          $conn,
-          'task.ownerPHID IS NOT NULL');
-      }
+    $subclause = array();
+
+    if ($this->noOwner) {
+      $subclause[] = qsprintf(
+        $conn,
+        'task.ownerPHID IS NULL');
     }
 
-    if ($this->includeUnowned) {
-      return qsprintf(
+    if ($this->anyOwner) {
+      $subclause[] = qsprintf(
         $conn,
-        'task.ownerPHID IN (%Ls) OR task.ownerPHID IS NULL',
-        $this->ownerPHIDs);
-    } else {
-      return qsprintf(
+        'task.ownerPHID IS NOT NULL');
+    }
+
+    if ($this->ownerPHIDs) {
+      $subclause[] = qsprintf(
         $conn,
         'task.ownerPHID IN (%Ls)',
         $this->ownerPHIDs);
     }
+
+    if (!$subclause) {
+      return '';
+    }
+
+    return '('.implode(') OR (', $subclause).')';
   }
 
   private function buildFullTextWhereClause(AphrontDatabaseConnection $conn) {
diff --git a/src/applications/people/typeahead/PhabricatorPeopleAnyOwnerDatasource.php b/src/applications/people/typeahead/PhabricatorPeopleAnyOwnerDatasource.php
new file mode 100644
--- /dev/null
+++ b/src/applications/people/typeahead/PhabricatorPeopleAnyOwnerDatasource.php
@@ -0,0 +1,68 @@
+<?php
+
+final class PhabricatorPeopleAnyOwnerDatasource
+  extends PhabricatorTypeaheadDatasource {
+
+  const FUNCTION_TOKEN = 'anyone()';
+
+  public function getBrowseTitle() {
+    return pht('Browse Any Owner');
+  }
+
+  public function getPlaceholderText() {
+    return pht('Type "anyone()"...');
+  }
+
+  public function getDatasourceApplicationClass() {
+    return 'PhabricatorPeopleApplication';
+  }
+
+  public function getDatasourceFunctions() {
+    return array(
+      'anyone' => array(
+        'name' => pht('Anyone'),
+        'summary' => pht('Find results which are assigned to anyone.'),
+        'description' => pht(
+          'This function includes results which have any owner. It excludes '.
+          'unassigned or unowned results.'),
+      ),
+    );
+  }
+
+  public function loadResults() {
+    $results = array(
+      $this->buildAnyoneResult(),
+    );
+    return $this->filterResultsAgainstTokens($results);
+  }
+
+  protected function evaluateFunction($function, array $argv_list) {
+    $results = array();
+
+    foreach ($argv_list as $argv) {
+      $results[] = self::FUNCTION_TOKEN;
+    }
+
+    return $results;
+  }
+
+  public function renderFunctionTokens($function, array $argv_list) {
+    $results = array();
+    foreach ($argv_list as $argv) {
+      $results[] = PhabricatorTypeaheadTokenView::newFromTypeaheadResult(
+        $this->buildAnyoneResult());
+    }
+    return $results;
+  }
+
+  private function buildAnyoneResult() {
+    $name = pht('Any Owner');
+    return $this->newFunctionResult()
+      ->setName($name.' anyone')
+      ->setDisplayName($name)
+      ->setIcon('fa-certificate')
+      ->setPHID(self::FUNCTION_TOKEN)
+      ->setUnique(true);
+  }
+
+}
diff --git a/src/applications/people/typeahead/PhabricatorPeopleOwnerDatasource.php b/src/applications/people/typeahead/PhabricatorPeopleOwnerDatasource.php
--- a/src/applications/people/typeahead/PhabricatorPeopleOwnerDatasource.php
+++ b/src/applications/people/typeahead/PhabricatorPeopleOwnerDatasource.php
@@ -15,6 +15,7 @@
     return array(
       new PhabricatorViewerDatasource(),
       new PhabricatorPeopleNoOwnerDatasource(),
+      new PhabricatorPeopleAnyOwnerDatasource(),
       new PhabricatorPeopleDatasource(),
       new PhabricatorProjectMembersDatasource(),
     );
diff --git a/src/applications/search/engine/PhabricatorSearchEngineElastic.php b/src/applications/search/engine/PhabricatorSearchEngineElastic.php
--- a/src/applications/search/engine/PhabricatorSearchEngineElastic.php
+++ b/src/applications/search/engine/PhabricatorSearchEngineElastic.php
@@ -125,8 +125,6 @@
     $relationship_map = array(
       PhabricatorSearchRelationship::RELATIONSHIP_AUTHOR =>
         $query->getParameter('authorPHIDs', array()),
-      PhabricatorSearchRelationship::RELATIONSHIP_OWNER =>
-        $query->getParameter('ownerPHIDs', array()),
       PhabricatorSearchRelationship::RELATIONSHIP_SUBSCRIBER =>
         $query->getParameter('subscriberPHIDs', array()),
       PhabricatorSearchRelationship::RELATIONSHIP_PROJECT =>
@@ -155,6 +153,14 @@
       $relationship_map[$rel_unowned] = true;
     }
 
+    $rel_owner = PhabricatorSearchRelationship::RELATIONSHIP_OWNER;
+    if ($query->getParameter('withAnyOwner')) {
+      $relationship_map[$rel_owner] = true;
+    } else {
+      $owner_phids = $query->getParameter('ownerPHIDs', array());
+      $relationship_map[$rel_owner] = $owner_phids;
+    }
+
     foreach ($relationship_map as $field => $param) {
       if (is_array($param) && $param) {
         $should = array();
diff --git a/src/applications/search/engine/PhabricatorSearchEngineMySQL.php b/src/applications/search/engine/PhabricatorSearchEngineMySQL.php
--- a/src/applications/search/engine/PhabricatorSearchEngineMySQL.php
+++ b/src/applications/search/engine/PhabricatorSearchEngineMySQL.php
@@ -231,7 +231,14 @@
         true);
     }
 
-    if ($query->getParameter('withUnowned')) {
+    if ($query->getParameter('withAnyOwner')) {
+      $join[] = $this->joinRelationship(
+        $conn_r,
+        $query,
+        'withAnyOwner',
+        PhabricatorSearchRelationship::RELATIONSHIP_OWNER,
+        true);
+    } else if ($query->getParameter('withUnowned')) {
       $join[] = $this->joinRelationship(
         $conn_r,
         $query,
diff --git a/src/applications/search/query/PhabricatorSearchApplicationSearchEngine.php b/src/applications/search/query/PhabricatorSearchApplicationSearchEngine.php
--- a/src/applications/search/query/PhabricatorSearchApplicationSearchEngine.php
+++ b/src/applications/search/query/PhabricatorSearchApplicationSearchEngine.php
@@ -58,6 +58,10 @@
         $config->setParameter('withUnowned', true);
         unset($owner_phids[$key]);
       }
+      if ($phid == PhabricatorPeopleAnyOwnerDatasource::FUNCTION_TOKEN) {
+        $config->setParameter('withAnyOwner', true);
+        unset($owner_phids[$key]);
+      }
     }
     $config->setParameter('ownerPHIDs', $owner_phids);