Index: src/wp-admin/includes/class-wp-upgrader.php
===================================================================
--- src/wp-admin/includes/class-wp-upgrader.php	(revision 26021)
+++ src/wp-admin/includes/class-wp-upgrader.php	(working copy)
@@ -2026,6 +2026,15 @@
 				$this->after_core_update( $this->update_results['core'][0] );
 		}

+		/**
+		 * Action triggered after all automatic updates have run.
+		 *
+		 * @since 3.8.0
+		 *
+		 * @param array $update_results The results of all updates attempted
+		 */
+		do_action( 'automatic_updates_complete', $this->update_results );
+
 		// Clear the lock
 		delete_option( $lock_name );
 	}