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
@@ -511,6 +511,7 @@
     'DifferentialRevisionAuthorHeraldField' => 'applications/differential/herald/DifferentialRevisionAuthorHeraldField.php',
     'DifferentialRevisionAuthorProjectsHeraldField' => 'applications/differential/herald/DifferentialRevisionAuthorProjectsHeraldField.php',
     'DifferentialRevisionCloseDetailsController' => 'applications/differential/controller/DifferentialRevisionCloseDetailsController.php',
+    'DifferentialRevisionCloseTransaction' => 'applications/differential/xaction/DifferentialRevisionCloseTransaction.php',
     'DifferentialRevisionContentAddedHeraldField' => 'applications/differential/herald/DifferentialRevisionContentAddedHeraldField.php',
     'DifferentialRevisionContentHeraldField' => 'applications/differential/herald/DifferentialRevisionContentHeraldField.php',
     'DifferentialRevisionContentRemovedHeraldField' => 'applications/differential/herald/DifferentialRevisionContentRemovedHeraldField.php',
@@ -544,6 +545,7 @@
     'DifferentialRevisionReclaimTransaction' => 'applications/differential/xaction/DifferentialRevisionReclaimTransaction.php',
     'DifferentialRevisionRelationship' => 'applications/differential/relationships/DifferentialRevisionRelationship.php',
     'DifferentialRevisionRelationshipSource' => 'applications/search/relationship/DifferentialRevisionRelationshipSource.php',
+    'DifferentialRevisionReopenTransaction' => 'applications/differential/xaction/DifferentialRevisionReopenTransaction.php',
     'DifferentialRevisionRepositoryHeraldField' => 'applications/differential/herald/DifferentialRevisionRepositoryHeraldField.php',
     'DifferentialRevisionRepositoryProjectsHeraldField' => 'applications/differential/herald/DifferentialRevisionRepositoryProjectsHeraldField.php',
     'DifferentialRevisionRepositoryTransaction' => 'applications/differential/xaction/DifferentialRevisionRepositoryTransaction.php',
@@ -5180,6 +5182,7 @@
     'DifferentialRevisionAuthorHeraldField' => 'DifferentialRevisionHeraldField',
     'DifferentialRevisionAuthorProjectsHeraldField' => 'DifferentialRevisionHeraldField',
     'DifferentialRevisionCloseDetailsController' => 'DifferentialController',
+    'DifferentialRevisionCloseTransaction' => 'DifferentialRevisionActionTransaction',
     'DifferentialRevisionContentAddedHeraldField' => 'DifferentialRevisionHeraldField',
     'DifferentialRevisionContentHeraldField' => 'DifferentialRevisionHeraldField',
     'DifferentialRevisionContentRemovedHeraldField' => 'DifferentialRevisionHeraldField',
@@ -5213,6 +5216,7 @@
     'DifferentialRevisionReclaimTransaction' => 'DifferentialRevisionActionTransaction',
     'DifferentialRevisionRelationship' => 'PhabricatorObjectRelationship',
     'DifferentialRevisionRelationshipSource' => 'PhabricatorObjectRelationshipSource',
+    'DifferentialRevisionReopenTransaction' => 'DifferentialRevisionActionTransaction',
     'DifferentialRevisionRepositoryHeraldField' => 'DifferentialRevisionHeraldField',
     'DifferentialRevisionRepositoryProjectsHeraldField' => 'DifferentialRevisionHeraldField',
     'DifferentialRevisionRepositoryTransaction' => 'DifferentialRevisionTransactionType',
diff --git a/src/applications/differential/xaction/DifferentialRevisionAbandonTransaction.php b/src/applications/differential/xaction/DifferentialRevisionAbandonTransaction.php
--- a/src/applications/differential/xaction/DifferentialRevisionAbandonTransaction.php
+++ b/src/applications/differential/xaction/DifferentialRevisionAbandonTransaction.php
@@ -45,7 +45,7 @@
           pht(
             'You can not abandon this revision because you are not the '.
             'author. You can only abandon revisions you own. You can change '.
-            'this behavior by adjusting the "%s" setting in Config',
+            'this behavior by adjusting the "%s" setting in Config.',
             $config_key));
       }
     }
diff --git a/src/applications/differential/xaction/DifferentialRevisionCloseTransaction.php b/src/applications/differential/xaction/DifferentialRevisionCloseTransaction.php
new file mode 100644
--- /dev/null
+++ b/src/applications/differential/xaction/DifferentialRevisionCloseTransaction.php
@@ -0,0 +1,78 @@
+<?php
+
+final class DifferentialRevisionCloseTransaction
+  extends DifferentialRevisionActionTransaction {
+
+  const TRANSACTIONTYPE = 'differential.revision.close';
+  const ACTIONKEY = 'close';
+
+  protected function getRevisionActionLabel() {
+    return pht('Close Revision');
+  }
+
+  protected function getRevisionActionDescription() {
+    return pht('This revision will be closed.');
+  }
+
+  public function getIcon() {
+    return 'fa-check';
+  }
+
+  public function getColor() {
+    return 'indigo';
+  }
+
+  public function generateOldValue($object) {
+    return $object->isClosed();
+  }
+
+  public function applyInternalEffects($object, $value) {
+    $status_closed = ArcanistDifferentialRevisionStatus::CLOSED;
+    $status_accepted = ArcanistDifferentialRevisionStatus::ACCEPTED;
+
+    $old_status = $object->getStatus();
+
+    $object->setStatus($status_closed);
+
+    $was_accepted = ($old_status == $status_accepted);
+
+    $object->setProperty(
+      DifferentialRevision::PROPERTY_CLOSED_FROM_ACCEPTED,
+      $was_accepted);
+  }
+
+  protected function validateAction($object, PhabricatorUser $viewer) {
+    if ($object->isClosed()) {
+      throw new Exception(
+        pht(
+          'You can not close this revision because it has already been '.
+          'closed. Only open revisions can be closed.'));
+    }
+
+    $config_key = 'differential.always-allow-close';
+    if (!PhabricatorEnv::getEnvConfig($config_key)) {
+      if (!$this->isViewerRevisionAuthor($object, $viewer)) {
+        throw new Exception(
+          pht(
+            'You can not close this revision because you are not the '.
+            'author. You can only close revisions you own. You can change '.
+            'this behavior by adjusting the "%s" setting in Config.',
+            $config_key));
+      }
+    }
+  }
+
+  public function getTitle() {
+    return pht(
+      '%s closed this revision.',
+      $this->renderAuthor());
+  }
+
+  public function getTitleForFeed() {
+    return pht(
+      '%s closed %s.',
+      $this->renderAuthor(),
+      $this->renderObject());
+  }
+
+}
diff --git a/src/applications/differential/xaction/DifferentialRevisionReopenTransaction.php b/src/applications/differential/xaction/DifferentialRevisionReopenTransaction.php
new file mode 100644
--- /dev/null
+++ b/src/applications/differential/xaction/DifferentialRevisionReopenTransaction.php
@@ -0,0 +1,68 @@
+<?php
+
+final class DifferentialRevisionReopenTransaction
+  extends DifferentialRevisionActionTransaction {
+
+  const TRANSACTIONTYPE = 'differential.revision.reopen';
+  const ACTIONKEY = 'reopen';
+
+  protected function getRevisionActionLabel() {
+    return pht('Reopen Revision');
+  }
+
+  protected function getRevisionActionDescription() {
+    return pht('This revision will be reopened for review.');
+  }
+
+  public function getIcon() {
+    return 'fa-bullhorn';
+  }
+
+  public function getColor() {
+    return 'sky';
+  }
+
+  public function generateOldValue($object) {
+    return !$object->isClosed();
+  }
+
+  public function applyInternalEffects($object, $value) {
+    $object->setStatus(ArcanistDifferentialRevisionStatus::NEEDS_REVIEW);
+  }
+
+  protected function validateAction($object, PhabricatorUser $viewer) {
+    // Note that we're testing for "Closed", exactly, not just any closed
+    // status.
+    $status_closed = ArcanistDifferentialRevisionStatus::CLOSED;
+    if ($object->getStatus() != $status_closed) {
+      throw new Exception(
+        pht(
+          'You can not reopen this revision because it is not closed. '.
+          'Only closed revisions can be reopened.'));
+    }
+
+    $config_key = 'differential.allow-reopen';
+    if (!PhabricatorEnv::getEnvConfig($config_key)) {
+      throw new Exception(
+        pht(
+          'You can not reopen this revision because configuration prevents '.
+          'any revision from being reopened. You can change this behavior '.
+          'by adjusting the "%s" setting in Config.',
+          $config_key));
+    }
+  }
+
+  public function getTitle() {
+    return pht(
+      '%s reopened this revision.',
+      $this->renderAuthor());
+  }
+
+  public function getTitleForFeed() {
+    return pht(
+      '%s reopened %s.',
+      $this->renderAuthor(),
+      $this->renderObject());
+  }
+
+}