diff --git a/src/NzbDrone.Core/CustomFormats/Specifications/ReleaseGroupSpecification.cs b/src/NzbDrone.Core/CustomFormats/Specifications/ReleaseGroupSpecification.cs
new file mode 100644
index 000000000..72319dad7
--- /dev/null
+++ b/src/NzbDrone.Core/CustomFormats/Specifications/ReleaseGroupSpecification.cs
@@ -0,0 +1,16 @@
+using NzbDrone.Core.Parser.Model;
+
+namespace NzbDrone.Core.CustomFormats
+{
+    public class ReleaseGroupSpecification : RegexSpecificationBase
+    {
+        public override int Order => 9;
+        public override string ImplementationName => "Release Group";
+        public override string InfoLink => "https://wiki.servarr.com/radarr/settings#custom-formats-2";
+
+        protected override bool IsSatisfiedByWithoutNegate(ParsedMovieInfo movieInfo)
+        {
+            return MatchString(movieInfo?.ReleaseGroup);
+        }
+    }
+}