diff --git a/App.tsx b/App.tsx
index 637a892..7822498 100644
--- a/App.tsx
+++ b/App.tsx
@@ -6,7 +6,7 @@ import FilterBar from './components/FilterBar';
 import AIChat from './components/AIChat';
 import CrazeLogo from './components/CrazeLogo';
 import { SalesRecord, FilterState, AggregatedData, AdsRecord, TrafficRecord, ForecastRecord, ProductForecastData } from './types';
-import { processCSV, filterData, filterAdsData, aggregateData, getUniqueValues, processAdsCSV, processAdsExcel, processTrafficExcel, mergeSalesAndAdsData, processForecastExcel, calculateForecastViewData, processStockExcel } from './services/dataProcessor';
+import { processCSV, filterData, filterAdsData, aggregateData, getUniqueValues, processAdsCSV, processAdsExcel, processTrafficExcel, mergeSalesAndAdsData, processForecastExcel, calculateForecastViewData, processStockExcel, processVendorStockExcel } from './services/dataProcessor';
 import { queryGemini } from './services/geminiService';
 import { ChartIcon, TableIcon, UploadIcon, DownloadIcon, CloseIcon, TrendingIcon, MegaphoneIcon } from './components/Icons';
 import { loadSalesData, saveSalesData, clearSalesData, loadAdsData, saveAdsData, clearAdsData } from './services/storage';
@@ -49,6 +49,7 @@ const App: React.FC = () => {
   const [activeUrl, setActiveUrl] = useState<string | null>(() => localStorage.getItem('craze_csv_url') || PERMANENT_DROPBOX_URL);
   const [lastUpdated, setLastUpdated] = useState<string | null>(null);
   const [stockMap, setStockMap] = useState<Map<string, number>>(new Map());
+  const [vendorStockMap, setVendorStockMap] = useState<Map<string, { eu: number; uk: number }>>(new Map());
 
   // Modal State
   const [isDataModalOpen, setIsDataModalOpen] = useState(false);
@@ -143,8 +144,8 @@ const App: React.FC = () => {
 
   const handleStockFetch = useCallback(async () => {
     try {
-      console.log('[App] Fetching stock from /api/fetch-stock...');
-      const response = await fetch('/api/fetch-stock');
+      console.log('[App] Fetching stock from /Item Availability.xlsx...');
+      const response = await fetch('/Item Availability.xlsx');
       if (!response.ok) throw new Error(`Failed to fetch stock: ${response.status}`);
 
       const buffer = await response.arrayBuffer();
@@ -156,6 +157,21 @@ const App: React.FC = () => {
     }
   }, []);
 
+  const handleVendorStockFetch = useCallback(async () => {
+    try {
+      console.log('[App] Fetching vendor stock from /Vendor Stock.xlsx...');
+      const response = await fetch('/Vendor Stock.xlsx');
+      if (!response.ok) throw new Error(`Failed to fetch vendor stock: ${response.status}`);
+
+      const buffer = await response.arrayBuffer();
+      const data = await processVendorStockExcel(buffer);
+      setVendorStockMap(data);
+      console.log('[App] Successfully loaded vendor stock for', data.size, 'ASINs');
+    } catch (error) {
+      console.error("Failed to fetch/parse Vendor Stock", error);
+    }
+  }, []);
+
 
   const handleForecastFetch = useCallback(async (sales: SalesRecord[], globalSales: SalesRecord[], activeFilters: FilterState) => {
     try {
@@ -283,6 +299,7 @@ const App: React.FC = () => {
       // 1d. Always fetch Stock data
       console.log("Fetching Stock data...");
       handleStockFetch();
+      handleVendorStockFetch();
 
       // 1e. Fetch Forecast data
       handleForecastFetch(cachedData || [], cachedData || [], filters);
@@ -528,7 +545,7 @@ const App: React.FC = () => {
           <div className="flex items-center gap-6">
             {/* Force Sync Action */}
             <button
-              onClick={() => { handleDataFetch(); handleAdsFetch(); handleTrafficFetch(); }}
+              onClick={() => { handleDataFetch(); handleAdsFetch(); handleTrafficFetch(); handleVendorStockFetch(); }}
               disabled={syncing}
               className={`flex items-center gap-2 px-4 py-2 rounded-xl text-sm font-black uppercase tracking-widest transition-all
                 ${syncing
@@ -609,6 +626,7 @@ const App: React.FC = () => {
                     hasCustomerFilter={filters.customer.length > 0}
                     adsData={filteredAdsData}
                     stockMap={stockMap}
+                    vendorStockMap={vendorStockMap}
                     top50Ranking={top50Ranking2025}
                     top50Mode={filters.customer.includes('Amazon UK') ? 'uk' : 'eu'}
                   />
@@ -620,6 +638,7 @@ const App: React.FC = () => {
                     data={combinedAdsData}
                     onDrillDown={handleSkuDrillDown}
                     stockMap={stockMap}
+                    vendorStockMap={vendorStockMap}
                     stockFilter={filters.stock}
                     onStockFilterChange={(s) => setFilters(prev => ({ ...prev, stock: s }))}
                     customerFilters={filters.customer}
@@ -640,6 +659,7 @@ const App: React.FC = () => {
                     filters={filters}
                     top50Ranking={top50Ranking2025}
                     stockMap={stockMap}
+                    vendorStockMap={vendorStockMap}
                     stockFilter={filters.stock}
                     onStockFilterChange={(s) => setFilters(prev => ({ ...prev, stock: s }))}
                     top50Mode={filters.customer.includes('Amazon UK') ? 'uk' : 'eu'}
@@ -653,6 +673,7 @@ const App: React.FC = () => {
                     filters={filters}
                     top50Ranking={top50Ranking2025}
                     stockMap={stockMap}
+                    vendorStockMap={vendorStockMap}
                     stockFilter={filters.stock}
                     onStockFilterChange={(s) => setFilters(prev => ({ ...prev, stock: s }))}
                     top50Mode={filters.customer.includes('Amazon UK') ? 'uk' : 'eu'}
diff --git a/api/fetch-vendor-stock.ts b/api/fetch-vendor-stock.ts
new file mode 100644
index 0000000..94d3cf4
--- /dev/null
+++ b/api/fetch-vendor-stock.ts
@@ -0,0 +1,49 @@
+
+import type { VercelRequest, VercelResponse } from '@vercel/node';
+import fs from 'fs';
+import path from 'path';
+
+export default async function handler(req: VercelRequest, res: VercelResponse) {
+    // CORS headers
+    res.setHeader('Access-Control-Allow-Origin', '*');
+    res.setHeader('Access-Control-Allow-Methods', 'GET, OPTIONS');
+    res.setHeader('Access-Control-Allow-Headers', 'Content-Type');
+
+    if (req.method === 'OPTIONS') {
+        return res.status(200).end();
+    }
+
+    try {
+        console.log('[fetch-vendor-stock] Reading Vendor Stock file from local storage...');
+        // Try multiple possible paths to be robust
+        const pathsToTry = [
+            path.join(process.cwd(), 'Vendor Stock.xlsx'),
+            path.join(process.cwd(), 'public', 'Vendor Stock.xlsx'),
+            path.join('/Users/christianvidalwolf/github/CrazeAnalytix', 'Vendor Stock.xlsx')
+        ];
+
+        let buffer = null;
+        let foundPath = '';
+
+        for (const p of pathsToTry) {
+            console.log(`[fetch-vendor-stock] Checking path: ${p}`);
+            if (fs.existsSync(p)) {
+                buffer = fs.readFileSync(p);
+                foundPath = p;
+                break;
+            }
+        }
+
+        if (!buffer) {
+            throw new Error(`Vendor Stock file 'Vendor Stock.xlsx' not found in any of: ${pathsToTry.join(', ')}`);
+        }
+
+        console.log(`[fetch-vendor-stock] Successfully read Vendor Stock Excel from ${foundPath}, size: ${buffer.byteLength}`);
+
+        res.setHeader('Content-Type', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
+        res.status(200).send(buffer);
+    } catch (error: any) {
+        console.error('[fetch-vendor-stock] Error:', error);
+        res.status(500).json({ error: error.message });
+    }
+}
diff --git a/components/AdsPerformance.tsx b/components/AdsPerformance.tsx
index 525b4e5..477a81b 100644
--- a/components/AdsPerformance.tsx
+++ b/components/AdsPerformance.tsx
@@ -4,6 +4,7 @@ import { CombinedKPIs, FilterState } from '../types';
 import { DownloadIcon, FunnelIcon, TrendingIcon, ChartIcon } from './Icons';
 import { StockBadge } from './StockBadge';
 import { Top50Badge } from './Top50Badge';
+import { VendorStockBadge } from './VendorStockBadge';
 import { InColumnStockFilter } from './InColumnStockFilter';
 
 interface AdsPerformanceProps {
@@ -17,6 +18,7 @@ interface AdsPerformanceProps {
     stockFilter: string[];
     onStockFilterChange: (newFilters: string[]) => void;
     top50Mode: 'eu' | 'uk';
+    vendorStockMap?: Map<string, { eu: number; uk: number }>;
 }
 
 type SortKey = keyof CombinedKPIs | 'acos' | 'roas' | 'tacos' | 'ctr' | 'cpc' | 'cvrUnits';
@@ -37,7 +39,8 @@ const AdsRow: React.FC<{
     top50Ranking?: { eu: Map<string, number>; uk: Map<string, number> };
     top50Mode: 'eu' | 'uk';
     stockMap?: Map<string, number>;
-}> = React.memo(({ item, top50Ranking, top50Mode, stockMap }) => {
+    vendorStockMap?: Map<string, { eu: number; uk: number }>;
+}> = React.memo(({ item, top50Ranking, top50Mode, stockMap, vendorStockMap }) => {
     const asin = item.asin.trim().toUpperCase();
     const ranks: { rank: number; label: string; theme: 'amber' | 'blue' | 'indigo' }[] = [];
 
@@ -67,6 +70,7 @@ const AdsRow: React.FC<{
                         {stockMap && (
                             <StockBadge stock={stockMap.get(item.sku?.replace(/(DE|EN)$/i, ''))} />
                         )}
+                        <VendorStockBadge asin={item.asin} vendorStockMap={vendorStockMap} mode={top50Mode} />
                     </div>
                 </div>
             </td>
@@ -88,7 +92,7 @@ const AdsRow: React.FC<{
     );
 });
 
-const AdsPerformance: React.FC<AdsPerformanceProps> = ({ data, filters, top50Ranking, stockMap, stockFilter, onStockFilterChange, top50Mode }) => {
+const AdsPerformance: React.FC<AdsPerformanceProps> = ({ data, filters, top50Ranking, stockMap, vendorStockMap, stockFilter, onStockFilterChange, top50Mode }) => {
     const [searchTerm, setSearchTerm] = useState('');
     const [showOnlyTop50, setShowOnlyTop50] = useState(false);
     const [sortConfig, setSortConfig] = useState<{ key: SortKey; direction: 'asc' | 'desc' }>({
@@ -393,7 +397,7 @@ const AdsPerformance: React.FC<AdsPerformanceProps> = ({ data, filters, top50Ran
                         </thead>
                         <tbody className="divide-y divide-white/[0.03]">
                             {filteredAndSorted.map((p) => (
-                                <AdsRow key={p.id} item={p} top50Ranking={top50Ranking} top50Mode={top50Mode} stockMap={stockMap} />
+                                <AdsRow key={p.id} item={p} top50Ranking={top50Ranking} top50Mode={top50Mode} stockMap={stockMap} vendorStockMap={vendorStockMap} />
                             ))}
                         </tbody>
                     </table>
diff --git a/components/DataGrid.tsx b/components/DataGrid.tsx
index 77c9e37..9229e94 100644
--- a/components/DataGrid.tsx
+++ b/components/DataGrid.tsx
@@ -7,6 +7,7 @@ import { pivotSalesData, generateXLSX, aggregateForTimeSeries, aggregateForCompa
 import { DownloadIcon, FunnelIcon, CloseIcon, ChartIcon, TrendingIcon } from './Icons';
 import { StockBadge } from './StockBadge';
 import { Top50Badge } from './Top50Badge';
+import { VendorStockBadge } from './VendorStockBadge';
 
 interface DataGridProps {
     data: SalesRecord[] | CombinedKPIs[];
@@ -18,6 +19,7 @@ interface DataGridProps {
         uk: Map<string, number>;
     };
     top50Mode: 'eu' | 'uk';
+    vendorStockMap?: Map<string, { eu: number; uk: number }>;
 }
 
 type SortConfig = {
@@ -234,7 +236,7 @@ const ExpandableChartCard: React.FC<{ title: string; children: React.ReactNode;
 };
 
 
-const DataGrid: React.FC<DataGridProps> = ({ data, hasCustomerFilter, adsData, stockMap, top50Ranking, top50Mode }) => {
+const DataGrid: React.FC<DataGridProps> = ({ data, hasCustomerFilter, adsData, stockMap, vendorStockMap, top50Ranking, top50Mode }) => {
     const [currentPage, setCurrentPage] = useState(1);
     const [sortConfig, setSortConfig] = useState<SortConfig>({ key: null, direction: 'desc' });
     const [showChart, setShowChart] = useState(true);
@@ -1090,7 +1092,10 @@ const DataGrid: React.FC<DataGridProps> = ({ data, hasCustomerFilter, adsData, s
                                             ? <div className="flex items-start gap-2">
                                                 <span className="line-clamp-2" title={row.title}>{row.title || '-'}</span>
                                                 {stockMap && (
-                                                    <StockBadge stock={stockMap.get(row.sku?.replace(/(DE|EN)$/i, ''))} />
+                                                    <>
+                                                        <StockBadge stock={stockMap.get(row.sku?.replace(/(DE|EN)$/i, ''))} />
+                                                        <VendorStockBadge asin={row.asin} vendorStockMap={vendorStockMap} mode={top50Mode} />
+                                                    </>
                                                 )}
                                             </div>
                                             : dim === 'asin' || dim === 'sku'
diff --git a/components/ForecastView.tsx b/components/ForecastView.tsx
index bd072f0..cd6853e 100644
--- a/components/ForecastView.tsx
+++ b/components/ForecastView.tsx
@@ -4,6 +4,7 @@ import { ProductForecastData, FilterState, CombinedKPIs } from '../types';
 import { DownloadIcon, FunnelIcon, TrendingIcon, ChartIcon } from './Icons';
 import { StockBadge } from './StockBadge';
 import { Top50Badge } from './Top50Badge';
+import { VendorStockBadge } from './VendorStockBadge';
 import { InColumnStockFilter } from './InColumnStockFilter';
 import { PAN_EU_COUNTRIES } from '../services/dataProcessor';
 import {
@@ -19,6 +20,7 @@ interface ForecastViewProps {
         uk: Map<string, number>;
     };
     stockMap?: Map<string, number>;
+    vendorStockMap?: Map<string, { eu: number; uk: number }>;
     stockFilter: string[];
     onStockFilterChange: (newFilters: string[]) => void;
     top50Mode: 'eu' | 'uk';
@@ -32,7 +34,8 @@ const ForecastRow: React.FC<{
     top50Ranking?: { eu: Map<string, number>; uk: Map<string, number> };
     top50Mode: 'eu' | 'uk';
     stockMap?: Map<string, number>;
-}> = React.memo(({ item, activeMonths, top50Ranking, top50Mode, stockMap }) => {
+    vendorStockMap?: Map<string, { eu: number; uk: number }>;
+}> = React.memo(({ item, activeMonths, top50Ranking, top50Mode, stockMap, vendorStockMap }) => {
     const asin = item.asin.trim().toUpperCase();
     const ranks: { rank: number; label: string; theme: 'amber' | 'blue' | 'indigo' }[] = [];
 
@@ -71,6 +74,7 @@ const ForecastRow: React.FC<{
                         {stockMap && (
                             <StockBadge stock={stockMap.get(item.sku?.replace(/(DE|EN)$/i, ''))} />
                         )}
+                        <VendorStockBadge asin={item.asin} vendorStockMap={vendorStockMap} mode={top50Mode} />
                     </div>
                 </div>
             </td>
@@ -112,7 +116,7 @@ const ForecastRow: React.FC<{
     );
 });
 
-const ForecastView: React.FC<ForecastViewProps> = ({ data, filters, top50Ranking, stockMap, stockFilter, onStockFilterChange, top50Mode }) => {
+const ForecastView: React.FC<ForecastViewProps> = ({ data, filters, top50Ranking, stockMap, vendorStockMap, stockFilter, onStockFilterChange, top50Mode }) => {
     const [searchTerm, setSearchTerm] = useState('');
     const [showOnlyTop50, setShowOnlyTop50] = useState(false);
     const [displayCount, setDisplayCount] = useState(50);
@@ -246,6 +250,7 @@ const ForecastView: React.FC<ForecastViewProps> = ({ data, filters, top50Ranking
                                     top50Ranking={top50Ranking}
                                     top50Mode={top50Mode}
                                     stockMap={stockMap}
+                                    vendorStockMap={vendorStockMap}
                                 />
                             ))}
                         </tbody>
diff --git a/components/VendorStockBadge.tsx b/components/VendorStockBadge.tsx
new file mode 100644
index 0000000..b19ba46
--- /dev/null
+++ b/components/VendorStockBadge.tsx
@@ -0,0 +1,62 @@
+
+import React from 'react';
+
+interface VendorStockBadgeProps {
+    asin: string;
+    vendorStockMap?: Map<string, { eu: number; uk: number }>;
+    mode: 'eu' | 'uk';
+}
+
+export const VendorStockBadge: React.FC<VendorStockBadgeProps> = ({ asin, vendorStockMap, mode }) => {
+    if (!vendorStockMap || !asin) return null;
+
+    const stockData = vendorStockMap.get(asin.toUpperCase());
+    if (!stockData) return null;
+
+    const stock = mode === 'uk' ? stockData.uk : stockData.eu;
+
+    // As per user request: "etiqueta será de color gris claro"
+    // Using a light gray/slate theme that fits the dashboard's premium look
+    const themeClasses = "bg-slate-200 text-slate-800 border-slate-300 shadow-sm";
+
+    return (
+        <div
+            className={`inline-flex items-center gap-1 px-2 py-0.5 rounded border text-[10px] font-bold transition-all hover:scale-105 active:scale-95 cursor-default ${themeClasses}`}
+            title={`Stock en Amazon Warehouse (${mode.toUpperCase()}): ${stock}`}
+        >
+            <svg
+                className="w-3.5 h-3.5"
+                viewBox="0 0 24 24"
+                fill="none"
+                xmlns="http://www.w3.org/2000/svg"
+            >
+                <path
+                    d="M17.5 14c.5 0 1 .5 1 1s-.5 1-1 1-1-.5-1-1 .5-1 1-1zm-11 0c.5 0 1 .5 1 1s-.5 1-1 1-1-.5-1-1 .5-1 1-1z"
+                    fill="currentColor"
+                />
+                <path
+                    d="M3 13.5c0 4.7 3.8 8.5 8.5 8.5s8.5-3.8 8.5-8.5"
+                    stroke="currentColor"
+                    strokeWidth="1.5"
+                    strokeLinecap="round"
+                />
+                <path
+                    d="M17 18.5c-1.5 1.5-3.5 2.5-5.5 2.5s-4-1-5.5-2.5"
+                    stroke="currentColor"
+                    strokeWidth="1.5"
+                    strokeLinecap="round"
+                />
+                <path
+                    d="M19 18.5l1.5 1.5M5 18.5L3.5 20"
+                    stroke="currentColor"
+                    strokeWidth="1.5"
+                    strokeLinecap="round"
+                />
+            </svg>
+            <div className="flex flex-col leading-[0.8]">
+                <span className="text-[7px] font-black uppercase opacity-60">Vendor</span>
+                <span>{stock.toLocaleString('de-DE')}</span>
+            </div>
+        </div>
+    );
+};
diff --git a/components/WeeklyGrid.tsx b/components/WeeklyGrid.tsx
index 94841ef..1705b24 100644
--- a/components/WeeklyGrid.tsx
+++ b/components/WeeklyGrid.tsx
@@ -5,6 +5,7 @@ import { pivotWeeklySalesData, WeeklyPivotRow, PAN_EU_COUNTRIES } from '../servi
 import { StockBadge } from './StockBadge';
 import { InColumnStockFilter } from './InColumnStockFilter';
 import { Top50Badge } from './Top50Badge';
+import { VendorStockBadge } from './VendorStockBadge';
 
 interface WeeklyGridProps {
     data: CombinedKPIs[];
@@ -17,6 +18,7 @@ interface WeeklyGridProps {
     stockFilter: string[];
     onStockFilterChange: (newFilters: string[]) => void;
     customerFilters: string[];
+    vendorStockMap?: Map<string, { eu: number; uk: number }>;
 }
 
 type SortConfig = {
@@ -48,7 +50,8 @@ const WeeklyRow: React.FC<{
     sortConfig: SortConfig;
     renderGrowth: (current: number, previous: number) => React.ReactNode;
     customerFilters: string[];
-}> = React.memo(({ row, weeks, onDrillDown, stockMap, top50Ranking, top50Mode, sortConfig, renderGrowth, customerFilters }) => {
+    vendorStockMap?: Map<string, { eu: number; uk: number }>;
+}> = React.memo(({ row, weeks, onDrillDown, stockMap, top50Ranking, top50Mode, sortConfig, renderGrowth, customerFilters, vendorStockMap }) => {
     const ranks: { rank: number; label: string; theme: 'amber' | 'blue' | 'indigo' }[] = [];
     const asin = row.asin.trim().toUpperCase();
 
@@ -85,6 +88,7 @@ const WeeklyRow: React.FC<{
                         {stockMap && (
                             <StockBadge stock={stockMap.get(row.sku?.replace(/(DE|EN)$/i, ''))} />
                         )}
+                        <VendorStockBadge asin={row.asin} vendorStockMap={vendorStockMap} mode={top50Mode} />
                     </div>
                     <span className="text-[9px] text-fuchsia-400/80 font-bold uppercase tracking-widest">{row.line}</span>
                 </div>
@@ -129,7 +133,7 @@ const WeeklyRow: React.FC<{
     );
 });
 
-const WeeklyGrid: React.FC<WeeklyGridProps & { top50Mode: 'eu' | 'uk' }> = ({ data, top50Ranking, onDrillDown, stockMap, stockFilter, onStockFilterChange, customerFilters, top50Mode }) => {
+const WeeklyGrid: React.FC<WeeklyGridProps & { top50Mode: 'eu' | 'uk' }> = ({ data, top50Ranking, onDrillDown, stockMap, vendorStockMap, stockFilter, onStockFilterChange, customerFilters, top50Mode }) => {
     // Pivot data - memoized
     const { rows, weeks: allWeeks } = useMemo(() => pivotWeeklySalesData(data), [data]);
 
@@ -545,6 +549,7 @@ const WeeklyGrid: React.FC<WeeklyGridProps & { top50Mode: 'eu' | 'uk' }> = ({ da
                                                     weeks={weeks}
                                                     onDrillDown={onDrillDown}
                                                     stockMap={stockMap}
+                                                    vendorStockMap={vendorStockMap}
                                                     top50Ranking={top50Ranking}
                                                     top50Mode={top50Mode}
                                                     sortConfig={sortConfig}
diff --git a/Item Availability.xlsx b/public/Item Availability.xlsx
similarity index 100%
rename from Item Availability.xlsx
rename to public/Item Availability.xlsx
diff --git a/public/Vendor Stock.xlsx b/public/Vendor Stock.xlsx
new file mode 100644
index 0000000..b8a8f49
Binary files /dev/null and b/public/Vendor Stock.xlsx differ
diff --git a/services/dataProcessor.ts b/services/dataProcessor.ts
index 4739520..9a1e959 100644
--- a/services/dataProcessor.ts
+++ b/services/dataProcessor.ts
@@ -1694,6 +1694,68 @@ export const calculateForecastViewData = (
     });
 };
 
+export const processVendorStockExcel = async (fileOrBuffer: File | ArrayBuffer): Promise<Map<string, { eu: number; uk: number }>> => {
+    try {
+        const arrayBuffer = fileOrBuffer instanceof File
+            ? await fileOrBuffer.arrayBuffer()
+            : fileOrBuffer;
+        const workbook = XLSX.read(arrayBuffer, { type: 'array' });
+        const sheetName = workbook.SheetNames[0];
+        const worksheet = workbook.Sheets[sheetName];
+        const jsonData: any[][] = XLSX.utils.sheet_to_json(worksheet, { header: 1 });
+
+        const vendorStockMap = new Map<string, { eu: number; uk: number }>();
+
+        // Find header row (it contains "ASIN")
+        let headerRowIndex = -1;
+        for (let i = 0; i < Math.min(jsonData.length, 20); i++) {
+            if (jsonData[i] && jsonData[i].includes('ASIN')) {
+                headerRowIndex = i;
+                break;
+            }
+        }
+
+        if (headerRowIndex === -1) {
+            console.warn("Could not find header row in Vendor Stock Excel");
+            return vendorStockMap;
+        }
+
+        // Skip headers
+        // A (0): ASIN
+        // D (3): Marketplace (Country)
+        // P (15): Sellable on hands units
+        for (let i = headerRowIndex + 1; i < jsonData.length; i++) {
+            const row = jsonData[i];
+            if (!row || row.length < 16) continue;
+
+            const asin = String(row[0] || '').trim().toUpperCase();
+            const marketplace = String(row[3] || '').trim().toLowerCase();
+            const stockValue = parseUnits(String(row[15] || '0'));
+
+            if (!asin) continue;
+
+            if (!vendorStockMap.has(asin)) {
+                vendorStockMap.set(asin, { eu: 0, uk: 0 });
+            }
+
+            const current = vendorStockMap.get(asin)!;
+
+            // Map to UK or EU
+            if (marketplace.includes('uk') || marketplace.includes('kingdom') || marketplace === 'gb') {
+                current.uk += stockValue;
+            } else {
+                // Assume everything else is Pan-EU for now if it's not UK
+                current.eu += stockValue;
+            }
+        }
+
+        return vendorStockMap;
+    } catch (error) {
+        console.error("Error processing Vendor Stock Excel:", error);
+        throw error;
+    }
+};
+
 export const processStockExcel = async (fileOrBuffer: File | ArrayBuffer): Promise<Map<string, number>> => {
     try {
         const arrayBuffer = fileOrBuffer instanceof File