diff --git a/apps/web/test/unit-tests/components/views/spaces/__snapshots__/SpacePanel-test.tsx.snap b/apps/web/test/unit-tests/components/views/spaces/__snapshots__/SpacePanel-test.tsx.snap
index 8acad258f2..298a81854c 100644
--- a/apps/web/test/unit-tests/components/views/spaces/__snapshots__/SpacePanel-test.tsx.snap
+++ b/apps/web/test/unit-tests/components/views/spaces/__snapshots__/SpacePanel-test.tsx.snap
@@ -7,19 +7,19 @@ exports[`<SpacePanel /> should show all activated MetaSpaces in the correct orde
     class="mx_SpacePanel collapsed newUi"
   >
     <div
-      class="_wrapper_gc5p4_8 mx_UserMenu"
+      class="_wrapper_11z86_8 mx_UserMenu"
     >
       <button
         aria-expanded="false"
         aria-haspopup="menu"
         aria-label="User menu"
-        class="_triggerButton_gc5p4_80"
+        class="_triggerButton_11z86_80"
         data-state="closed"
         id="radix-react-use-id-1"
         type="button"
       >
         <div
-          class="_avatarWrapper_gc5p4_57"
+          class="_avatarWrapper_11z86_57"
         >
           <span
             aria-label="@test:test"
diff --git a/packages/shared-components/__vis__/linux/__baselines__/menus/UserMenu/UserMenu.stories.tsx/longer-name-auto.png b/packages/shared-components/__vis__/linux/__baselines__/menus/UserMenu/UserMenu.stories.tsx/longer-name-auto.png
index e756e557d9..3f869333af 100644
Binary files a/packages/shared-components/__vis__/linux/__baselines__/menus/UserMenu/UserMenu.stories.tsx/longer-name-auto.png and b/packages/shared-components/__vis__/linux/__baselines__/menus/UserMenu/UserMenu.stories.tsx/longer-name-auto.png differ
diff --git a/packages/shared-components/__vis__/linux/__baselines__/menus/UserMenu/UserMenu.stories.tsx/open-auto.png b/packages/shared-components/__vis__/linux/__baselines__/menus/UserMenu/UserMenu.stories.tsx/open-auto.png
index 4be221e456..b0c403a074 100644
Binary files a/packages/shared-components/__vis__/linux/__baselines__/menus/UserMenu/UserMenu.stories.tsx/open-auto.png and b/packages/shared-components/__vis__/linux/__baselines__/menus/UserMenu/UserMenu.stories.tsx/open-auto.png differ
diff --git a/packages/shared-components/src/menus/UserMenu/UserMenu.module.css b/packages/shared-components/src/menus/UserMenu/UserMenu.module.css
index 2b0348aa98..f571f565f0 100644
--- a/packages/shared-components/src/menus/UserMenu/UserMenu.module.css
+++ b/packages/shared-components/src/menus/UserMenu/UserMenu.module.css
@@ -98,3 +98,10 @@
     margin-right: var(--cpd-space-2x);
     padding-inline-start: var(--cpd-space-1-5x);
 }
+
+.displayName {
+    max-width: 175px;
+    white-space: nowrap;
+    text-overflow: ellipsis;
+    overflow: hidden;
+}
diff --git a/packages/shared-components/src/menus/UserMenu/UserMenu.tsx b/packages/shared-components/src/menus/UserMenu/UserMenu.tsx
index e345612407..2ed5db2713 100644
--- a/packages/shared-components/src/menus/UserMenu/UserMenu.tsx
+++ b/packages/shared-components/src/menus/UserMenu/UserMenu.tsx
@@ -203,7 +203,7 @@ export function UserMenuView({ vm, className }: UserMenuViewProps): JSX.Element
                 </section>
             </Menu>
             {expanded && (
-                <Text type="heading" size="sm" as="span" weight="semibold">
+                <Text type="heading" size="sm" as="span" weight="semibold" className={styles.displayName}>
                     {displayName}
                 </Text>
             )}
diff --git a/packages/shared-components/src/menus/UserMenu/__snapshots__/UserMenu.test.tsx.snap b/packages/shared-components/src/menus/UserMenu/__snapshots__/UserMenu.test.tsx.snap
index 5dda1f6ca3..f1de919ab3 100644
--- a/packages/shared-components/src/menus/UserMenu/__snapshots__/UserMenu.test.tsx.snap
+++ b/packages/shared-components/src/menus/UserMenu/__snapshots__/UserMenu.test.tsx.snap
@@ -39,7 +39,7 @@ exports[`UserMenu > renders a button 1`] = `
       </div>
     </button>
     <span
-      class="_typography_6v6n8_153 _font-heading-sm-semibold_6v6n8_93"
+      class="_typography_6v6n8_153 _font-heading-sm-semibold_6v6n8_93 UserMenu-module_displayName"
     >
       Sally Sanderson
     </span>
@@ -86,7 +86,7 @@ exports[`UserMenu > renders a button with a longer name 1`] = `
       </div>
     </button>
     <span
-      class="_typography_6v6n8_153 _font-heading-sm-semibold_6v6n8_93"
+      class="_typography_6v6n8_153 _font-heading-sm-semibold_6v6n8_93 UserMenu-module_displayName"
     >
       Sally Sanderson with a longer name
     </span>
@@ -138,7 +138,7 @@ exports[`UserMenu > renders a guest menu 1`] = `
         </div>
       </button>
       <span
-        class="_typography_6v6n8_153 _font-heading-sm-semibold_6v6n8_93"
+        class="_typography_6v6n8_153 _font-heading-sm-semibold_6v6n8_93 UserMenu-module_displayName"
       >
         Guest
       </span>
@@ -191,7 +191,7 @@ exports[`UserMenu > renders a menu 1`] = `
         </div>
       </button>
       <span
-        class="_typography_6v6n8_153 _font-heading-sm-semibold_6v6n8_93"
+        class="_typography_6v6n8_153 _font-heading-sm-semibold_6v6n8_93 UserMenu-module_displayName"
       >
         Sally Sanderson
       </span>
@@ -258,7 +258,7 @@ exports[`UserMenu > renders a menu without an avatar 1`] = `
         </div>
       </button>
       <span
-        class="_typography_6v6n8_153 _font-heading-sm-semibold_6v6n8_93"
+        class="_typography_6v6n8_153 _font-heading-sm-semibold_6v6n8_93 UserMenu-module_displayName"
       >
         Sally Sanderson
       </span>
@@ -571,7 +571,7 @@ exports[`UserMenu > renders an open menu 1`] = `
         </div>
       </button>
       <span
-        class="_typography_6v6n8_153 _font-heading-sm-semibold_6v6n8_93"
+        class="_typography_6v6n8_153 _font-heading-sm-semibold_6v6n8_93 UserMenu-module_displayName"
       >
         Sally Sanderson with a longer name
       </span>
@@ -931,7 +931,7 @@ exports[`UserMenu > renders the status emoji when set 1`] = `
       </div>
     </button>
     <span
-      class="_typography_6v6n8_153 _font-heading-sm-semibold_6v6n8_93"
+      class="_typography_6v6n8_153 _font-heading-sm-semibold_6v6n8_93 UserMenu-module_displayName"
     >
       Sally Sanderson
     </span>