diff --git a/report-app/src/app/pages/report-list/report-list.html b/report-app/src/app/pages/report-list/report-list.html
index 2093eca0..4856aa5d 100644
--- a/report-app/src/app/pages/report-list/report-list.html
+++ b/report-app/src/app/pages/report-list/report-list.html
@@ -37,6 +37,13 @@
                   </ul>
                 }
               </div>
+              @if (group.promptNames.length) {
+                <ul class="status-badge-group prompt-names">
+                  @for (name of group.promptNames; track name) {
+                    <li class="status-badge neutral">{{ name }}</li>
+                  }
+                </ul>
+              }
             </div>
             <div class="run-meta-container">
               <div class="run-meta">
diff --git a/report-app/src/app/pages/report-list/report-list.scss b/report-app/src/app/pages/report-list/report-list.scss
index d8ccf521..bc8bbd36 100644
--- a/report-app/src/app/pages/report-list/report-list.scss
+++ b/report-app/src/app/pages/report-list/report-list.scss
@@ -106,6 +106,15 @@ h1, h2 {
   padding: 0 20px;
 }
 
+.prompt-names {
+  margin-top: 0.4rem;
+
+  .status-badge {
+    font-size: 0.75rem;
+    font-weight: 400;
+  }
+}
+
 .select-for-comparison input[type='checkbox'] {
   width: 20px;
   height: 20px;
diff --git a/runner/orchestration/grouping.ts b/runner/orchestration/grouping.ts
index 0135cf70..054c17c6 100644
--- a/runner/orchestration/grouping.ts
+++ b/runner/orchestration/grouping.ts
@@ -55,6 +55,7 @@ export function groupSimilarReports(inputRuns: RunInfo[]): RunGroup[] {
     const groupResults: AssessmentResult[] = [];
     const firstRun = groupRuns[0];
     const labels = new Set<string>();
+    const promptNames = new Set<string>();
     let totalForGroup = 0;
     let maxForGroup = 0;
     let appsCount = 0;
@@ -70,6 +71,7 @@ export function groupSimilarReports(inputRuns: RunInfo[]): RunGroup[] {
         totalForRun += result.score.totalPoints;
         maxForRun += result.score.maxOverallPoints;
         groupResults.push(result);
+        promptNames.add(result.promptDef.name);
       }
 
       // `|| 0` in case there are no results, otherwise we'll get NaN.
@@ -90,6 +92,7 @@ export function groupSimilarReports(inputRuns: RunInfo[]): RunGroup[] {
       maxOverallPoints: maxForGroup / groupRuns.length || 0,
       appsCount,
       labels: Array.from(labels),
+      promptNames: Array.from(promptNames),
       environmentId: firstRun.details.summary.environmentId,
       framework: firstRun.details.summary.framework,
       model: firstRun.details.summary.model,
diff --git a/runner/reporting/report-local-disk.ts b/runner/reporting/report-local-disk.ts
index 1d3b8039..b695c364 100644
--- a/runner/reporting/report-local-disk.ts
+++ b/runner/reporting/report-local-disk.ts
@@ -37,6 +37,11 @@ export async function fetchReportsFromDisk(directory: string): Promise<FetchedLo
       // were part of the same invocation. Add a unique suffix to the ID to
       // prevent further grouping.
       run.group = group.id = `${group.id}-l${index}`;
+
+      // Derive prompt names from the run data for backward compatibility
+      // with older groups.json files that don't have the field.
+      group.promptNames ??= run.results.map(r => r.promptDef.name);
+
       data.set(group.id, {group, run});
     }),
   );
diff --git a/runner/shared-interfaces.ts b/runner/shared-interfaces.ts
index b08c8980..9a61c19f 100644
--- a/runner/shared-interfaces.ts
+++ b/runner/shared-interfaces.ts
@@ -637,6 +637,8 @@ export interface RunGroup {
   };
   /** Runner used to generate code for the runs in the group. */
   runner?: CodegenRunnerInfo;
+  /** Names of prompts that were evaluated in this group. */
+  promptNames: string[];
 }
 
 /** Request information for a file generation. */