diff --git a/src/vs/workbench/api/common/extHostEditorTabs.ts b/src/vs/workbench/api/common/extHostEditorTabs.ts
index 5230e595d9b..992f4f04c76 100644
--- a/src/vs/workbench/api/common/extHostEditorTabs.ts
+++ b/src/vs/workbench/api/common/extHostEditorTabs.ts
@@ -34,6 +34,7 @@ export interface IEditorTabGroup {
 
 export interface IEditorTabGroups {
 	all: IEditorTabGroup[];
+	activeTabGroup: IEditorTabGroup | undefined;
 	onDidChangeTabGroup: Event<void>;
 }
 
@@ -53,6 +54,7 @@ export class ExtHostEditorTabs implements IExtHostEditorTabs {
 
 	private _tabGroups: IEditorTabGroups = {
 		all: [],
+		activeTabGroup: undefined,
 		onDidChangeTabGroup: this._onDidChangeTabGroup.event
 	};
 
@@ -82,6 +84,11 @@ export class ExtHostEditorTabs implements IExtHostEditorTabs {
 				activeTab,
 				tabs
 			}));
+			// If the currrent group is active, set the active group to be that group.
+			// We must use the same object so we pull from the array to allow for reference equality
+			if (group.isActive) {
+				this._tabGroups.activeTabGroup = this._tabGroups.all[this._tabGroups.all.length - 1];
+			}
 		}
 		this._onDidChangeTabGroup.fire();
 	}
diff --git a/src/vscode-dts/vscode.proposed.tabs.d.ts b/src/vscode-dts/vscode.proposed.tabs.d.ts
index c4298a97a11..5dc164b6cc7 100644
--- a/src/vscode-dts/vscode.proposed.tabs.d.ts
+++ b/src/vscode-dts/vscode.proposed.tabs.d.ts
@@ -101,6 +101,11 @@ declare module 'vscode' {
 		 */
 		readonly all: TabGroup[];
 
+		/**
+		 * The currently active group
+		 */
+		readonly activeTabGroup: TabGroup | undefined;
+
 		/**
 		 * An {@link Event} which fires when a group changes.
 		 */