diff --git a/App.tsx b/App.tsx
index 7822498..18874a6 100644
--- a/App.tsx
+++ b/App.tsx
@@ -54,7 +54,6 @@ const App: React.FC = () => {
   // Modal State
   const [isDataModalOpen, setIsDataModalOpen] = useState(false);
 
-  // Filters State
   const [filters, setFilters] = useState<FilterState>({
     customer: [],
     year: [],
@@ -63,7 +62,9 @@ const App: React.FC = () => {
     asin: [],
     sku: [],
     title: [],
+    week: [],
     stock: [],
+    vendorStock: [],
   });
 
   // Handle Data Fetch (Simplified)
@@ -229,6 +230,7 @@ const App: React.FC = () => {
       title: [],
       week: [],
       stock: [],
+      vendorStock: [],
     });
   };
 
@@ -405,8 +407,15 @@ const App: React.FC = () => {
     return metaMap;
   }, [rawData]);
 
-  const filteredData = useMemo(() => filterData(rawData, filters, stockMap), [rawData, filters, stockMap]);
-  const filteredAdsData = useMemo(() => filterAdsData(adsData, filters, globalAsinMetadata, stockMap), [adsData, filters, globalAsinMetadata, stockMap]);
+  const top50Mode = useMemo(() => {
+    const hasUK = filters.customer.includes('Amazon UK');
+    const hasEU = filters.customer.some(c => ['Amazon DE', 'Amazon IT', 'Amazon FR', 'Amazon ES'].includes(c));
+    if (hasUK) return 'uk';
+    return 'eu';
+  }, [filters.customer]);
+
+  const filteredData = useMemo(() => filterData(rawData, filters, stockMap, vendorStockMap, top50Mode), [rawData, filters, stockMap, vendorStockMap, top50Mode]);
+  const filteredAdsData = useMemo(() => filterAdsData(adsData, filters, globalAsinMetadata, stockMap, vendorStockMap, top50Mode), [adsData, filters, globalAsinMetadata, stockMap, vendorStockMap, top50Mode]);
   const aggregatedData = useMemo(() => aggregateData(filteredData), [filteredData]);
 
   // Calculate country-aware Top 50 Best Sellers for 2025
@@ -641,6 +650,8 @@ const App: React.FC = () => {
                     vendorStockMap={vendorStockMap}
                     stockFilter={filters.stock}
                     onStockFilterChange={(s) => setFilters(prev => ({ ...prev, stock: s }))}
+                    vendorStockFilter={filters.vendorStock}
+                    onVendorStockFilterChange={(s) => setFilters(prev => ({ ...prev, vendorStock: s }))}
                     customerFilters={filters.customer}
                     top50Mode={filters.customer.includes('Amazon UK') ? 'uk' : 'eu'}
                     top50Ranking={top50Ranking2025}
@@ -662,6 +673,8 @@ const App: React.FC = () => {
                     vendorStockMap={vendorStockMap}
                     stockFilter={filters.stock}
                     onStockFilterChange={(s) => setFilters(prev => ({ ...prev, stock: s }))}
+                    vendorStockFilter={filters.vendorStock}
+                    onVendorStockFilterChange={(s) => setFilters(prev => ({ ...prev, vendorStock: s }))}
                     top50Mode={filters.customer.includes('Amazon UK') ? 'uk' : 'eu'}
                   />
                 </Suspense>
@@ -676,6 +689,8 @@ const App: React.FC = () => {
                     vendorStockMap={vendorStockMap}
                     stockFilter={filters.stock}
                     onStockFilterChange={(s) => setFilters(prev => ({ ...prev, stock: s }))}
+                    vendorStockFilter={filters.vendorStock}
+                    onVendorStockFilterChange={(s) => setFilters(prev => ({ ...prev, vendorStock: s }))}
                     top50Mode={filters.customer.includes('Amazon UK') ? 'uk' : 'eu'}
                   />
                 </Suspense>
diff --git a/components/AdsPerformance.tsx b/components/AdsPerformance.tsx
index 477a81b..0476e42 100644
--- a/components/AdsPerformance.tsx
+++ b/components/AdsPerformance.tsx
@@ -19,6 +19,8 @@ interface AdsPerformanceProps {
     onStockFilterChange: (newFilters: string[]) => void;
     top50Mode: 'eu' | 'uk';
     vendorStockMap?: Map<string, { eu: number; uk: number }>;
+    vendorStockFilter: string[];
+    onVendorStockFilterChange: (newFilters: string[]) => void;
 }
 
 type SortKey = keyof CombinedKPIs | 'acos' | 'roas' | 'tacos' | 'ctr' | 'cpc' | 'cvrUnits';
@@ -64,7 +66,9 @@ const AdsRow: React.FC<{
                         ))}
                         <span className="text-white font-bold text-sm tracking-tight">{item.asin}</span>
                     </div>
-                    <span className="text-[10px] uppercase font-black text-indigo-400 tracking-tighter">SKU: {item.sku}</span>
+                    <div className="flex items-center gap-2">
+                        <span className="text-[10px] uppercase font-black text-indigo-400 tracking-tighter">SKU: {item.sku}</span>
+                    </div>
                     <div className="flex items-start gap-2">
                         <span className="text-[10px] text-slate-400 truncate max-w-[200px] leading-tight" title={item.title}>{item.title}</span>
                         {stockMap && (
@@ -92,7 +96,18 @@ const AdsRow: React.FC<{
     );
 });
 
-const AdsPerformance: React.FC<AdsPerformanceProps> = ({ data, filters, top50Ranking, stockMap, vendorStockMap, stockFilter, onStockFilterChange, top50Mode }) => {
+const AdsPerformance: React.FC<AdsPerformanceProps> = ({
+    data,
+    filters,
+    top50Ranking,
+    stockMap,
+    vendorStockMap,
+    stockFilter,
+    onStockFilterChange,
+    vendorStockFilter,
+    onVendorStockFilterChange,
+    top50Mode
+}) => {
     const [searchTerm, setSearchTerm] = useState('');
     const [showOnlyTop50, setShowOnlyTop50] = useState(false);
     const [sortConfig, setSortConfig] = useState<{ key: SortKey; direction: 'asc' | 'desc' }>({
@@ -376,7 +391,24 @@ const AdsPerformance: React.FC<AdsPerformanceProps> = ({ data, filters, top50Ran
                                 <th className="p-4 font-black text-slate-400 uppercase tracking-widest min-w-[250px]">
                                     <div className="flex items-center gap-2">
                                         <span>PRODUCT</span>
-                                        <InColumnStockFilter currentFilters={stockFilter} onFilterChange={onStockFilterChange} />
+                                        <div className="flex items-center gap-1 scale-75 origin-left">
+                                            <InColumnStockFilter
+                                                currentFilters={stockFilter}
+                                                onFilterChange={onStockFilterChange}
+                                                title="Warehouse Stock"
+                                            />
+                                            <InColumnStockFilter
+                                                currentFilters={vendorStockFilter}
+                                                onFilterChange={onVendorStockFilterChange}
+                                                title="Vendor Stock"
+                                                options={[
+                                                    'Out of Stock (0)',
+                                                    'In Stock (>0)',
+                                                    'In Stock (>20)',
+                                                    'Low Stock (<10)',
+                                                ]}
+                                            />
+                                        </div>
                                     </div>
                                 </th>
                                 <SortableHeader label="TOTAL SALES" sortKey="salesTotal" activeSort={sortConfig} onSort={handleSort} />
diff --git a/components/ForecastView.tsx b/components/ForecastView.tsx
index cd6853e..0bfce8f 100644
--- a/components/ForecastView.tsx
+++ b/components/ForecastView.tsx
@@ -12,18 +12,10 @@ import {
     LineChart, Line, Legend, ComposedChart, Area
 } from 'recharts';
 
-interface ForecastViewProps {
-    data: ProductForecastData[];
-    filters: FilterState; // Restored filters prop
-    top50Ranking?: {
-        eu: Map<string, number>;
-        uk: Map<string, number>;
-    };
-    stockMap?: Map<string, number>;
-    vendorStockMap?: Map<string, { eu: number; uk: number }>;
-    stockFilter: string[];
-    onStockFilterChange: (newFilters: string[]) => void;
-    top50Mode: 'eu' | 'uk';
+top50Mode: 'eu' | 'uk';
+vendorStockMap ?: Map<string, { eu: number; uk: number }>;
+vendorStockFilter: string[];
+onVendorStockFilterChange: (newFilters: string[]) => void;
 }
 
 const MONTH_ORDER = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
@@ -116,7 +108,18 @@ const ForecastRow: React.FC<{
     );
 });
 
-const ForecastView: React.FC<ForecastViewProps> = ({ data, filters, top50Ranking, stockMap, vendorStockMap, stockFilter, onStockFilterChange, top50Mode }) => {
+const ForecastView: React.FC<ForecastViewProps> = ({
+    data,
+    filters,
+    top50Ranking,
+    stockMap,
+    vendorStockMap,
+    stockFilter,
+    onStockFilterChange,
+    vendorStockFilter,
+    onVendorStockFilterChange,
+    top50Mode
+}) => {
     const [searchTerm, setSearchTerm] = useState('');
     const [showOnlyTop50, setShowOnlyTop50] = useState(false);
     const [displayCount, setDisplayCount] = useState(50);
@@ -231,7 +234,24 @@ const ForecastView: React.FC<ForecastViewProps> = ({ data, filters, top50Ranking
                                 <th className="px-6 py-4 font-black text-slate-400 uppercase tracking-widest text-[10px] min-w-[300px]">
                                     <div className="flex items-center gap-2">
                                         <span>Product Details</span>
-                                        <InColumnStockFilter currentFilters={stockFilter} onFilterChange={onStockFilterChange} />
+                                        <div className="flex items-center gap-1 scale-75 origin-left">
+                                            <InColumnStockFilter
+                                                currentFilters={stockFilter}
+                                                onFilterChange={onStockFilterChange}
+                                                title="Warehouse Stock"
+                                            />
+                                            <InColumnStockFilter
+                                                currentFilters={vendorStockFilter}
+                                                onFilterChange={onVendorStockFilterChange}
+                                                title="Vendor Stock"
+                                                options={[
+                                                    'Out of Stock (0)',
+                                                    'In Stock (>0)',
+                                                    'In Stock (>20)',
+                                                    'Low Stock (<10)',
+                                                ]}
+                                            />
+                                        </div>
                                     </div>
                                 </th>
                                 <th className="px-6 py-4 font-black text-slate-400 uppercase tracking-widest text-[10px] text-center">Actuals</th>
diff --git a/components/InColumnStockFilter.tsx b/components/InColumnStockFilter.tsx
index 9350502..d301347 100644
--- a/components/InColumnStockFilter.tsx
+++ b/components/InColumnStockFilter.tsx
@@ -3,15 +3,22 @@ import React, { useState, useRef, useEffect } from 'react';
 interface InColumnStockFilterProps {
     currentFilters: string[];
     onFilterChange: (newFilters: string[]) => void;
+    title?: string;
+    options?: string[];
 }
 
-const STOCK_OPTIONS = [
+const DEFAULT_STOCK_OPTIONS = [
     'Out of Stock (0)',
     'In Stock (>0)',
     'Low Stock (<10)',
 ];
 
-export const InColumnStockFilter: React.FC<InColumnStockFilterProps> = ({ currentFilters, onFilterChange }) => {
+export const InColumnStockFilter: React.FC<InColumnStockFilterProps> = ({
+    currentFilters,
+    onFilterChange,
+    title = "Stock Filter",
+    options = DEFAULT_STOCK_OPTIONS
+}) => {
     const [isOpen, setIsOpen] = useState(false);
     const containerRef = useRef<HTMLDivElement>(null);
 
@@ -59,12 +66,12 @@ export const InColumnStockFilter: React.FC<InColumnStockFilterProps> = ({ curren
             {isOpen && (
                 <div className="absolute left-0 mt-2 w-48 bg-slate-900 border border-slate-700 rounded-xl shadow-2xl z-[999] p-2 animate-in fade-in zoom-in duration-150">
                     <div className="px-2 py-1.5 text-[10px] font-black text-slate-500 uppercase tracking-widest border-b border-slate-800 mb-1 flex justify-between items-center">
-                        <span>Stock Filter</span>
+                        <span>{title}</span>
                         {currentFilters.length > 0 && (
                             <button onClick={clearFilters} className="text-indigo-400 hover:text-indigo-300">Clear</button>
                         )}
                     </div>
-                    {STOCK_OPTIONS.map(option => {
+                    {options.map(option => {
                         const isSelected = currentFilters.includes(option);
                         return (
                             <div
diff --git a/components/WeeklyGrid.tsx b/components/WeeklyGrid.tsx
index 1705b24..8df71af 100644
--- a/components/WeeklyGrid.tsx
+++ b/components/WeeklyGrid.tsx
@@ -19,6 +19,8 @@ interface WeeklyGridProps {
     onStockFilterChange: (newFilters: string[]) => void;
     customerFilters: string[];
     vendorStockMap?: Map<string, { eu: number; uk: number }>;
+    vendorStockFilter: string[];
+    onVendorStockFilterChange: (newFilters: string[]) => void;
 }
 
 type SortConfig = {
@@ -133,7 +135,19 @@ const WeeklyRow: React.FC<{
     );
 });
 
-const WeeklyGrid: React.FC<WeeklyGridProps & { top50Mode: 'eu' | 'uk' }> = ({ data, top50Ranking, onDrillDown, stockMap, vendorStockMap, stockFilter, onStockFilterChange, customerFilters, top50Mode }) => {
+const WeeklyGrid: React.FC<WeeklyGridProps & { top50Mode: 'eu' | 'uk' }> = ({
+    data,
+    top50Ranking,
+    onDrillDown,
+    stockMap,
+    vendorStockMap,
+    stockFilter,
+    onStockFilterChange,
+    vendorStockFilter,
+    onVendorStockFilterChange,
+    customerFilters,
+    top50Mode
+}) => {
     // Pivot data - memoized
     const { rows, weeks: allWeeks } = useMemo(() => pivotWeeklySalesData(data), [data]);
 
@@ -460,10 +474,24 @@ const WeeklyGrid: React.FC<WeeklyGridProps & { top50Mode: 'eu' | 'uk' }> = ({ da
                                 >
                                     <div className="flex items-center gap-2">
                                         <span>Product Details</span>
-                                        <InColumnStockFilter
-                                            currentFilters={stockFilter}
-                                            onFilterChange={onStockFilterChange}
-                                        />
+                                        <div className="flex items-center gap-1">
+                                            <InColumnStockFilter
+                                                currentFilters={stockFilter}
+                                                onFilterChange={onStockFilterChange}
+                                                title="Warehouse Stock"
+                                            />
+                                            <InColumnStockFilter
+                                                currentFilters={vendorStockFilter}
+                                                onFilterChange={onVendorStockFilterChange}
+                                                title="Vendor Stock"
+                                                options={[
+                                                    'Out of Stock (0)',
+                                                    'In Stock (>0)',
+                                                    'In Stock (>20)',
+                                                    'Low Stock (<10)',
+                                                ]}
+                                            />
+                                        </div>
                                         {sortConfig?.metric === 'rank' && (
                                             <span className="text-amber-500 font-black text-sm animate-bounce-subtle">
                                                 {sortConfig.direction === 'asc' ? '↑' : '↓'}
diff --git a/services/dataProcessor.ts b/services/dataProcessor.ts
index 9a1e959..9618d3d 100644
--- a/services/dataProcessor.ts
+++ b/services/dataProcessor.ts
@@ -743,12 +743,50 @@ const checkStockFilter = (sku: string, filters: string[], stockMap?: Map<string,
     });
 };
 
+const checkVendorStockFilter = (asin: string, filters: string[], vendorStockMap?: Map<string, { eu: number; uk: number }>, mode: 'eu' | 'uk' = 'eu'): boolean => {
+    if (!filters || !Array.isArray(filters) || filters.length === 0) return true;
+    if (!vendorStockMap) return true;
+
+    const data = vendorStockMap.get(asin);
+    const stockValue = data ? (mode === 'uk' ? data.uk : data.eu) : 0;
+
+    return filters.some(f => {
+        if (f === 'Out of Stock (0)') return stockValue === 0;
+        if (f === 'In Stock (>20)') return stockValue > 20;
+        if (f === 'In Stock (>0)') return stockValue > 0;
+        if (f === 'Low Stock (<10)') return stockValue < 10;
+
+        const input = f.trim().toLowerCase();
+        if (input.includes('-')) {
+            const [start, end] = input.split('-').map(s => parseFloat(s.trim()));
+            if (!isNaN(start) && !isNaN(end)) return stockValue >= start && stockValue <= end;
+        } else if (input.startsWith('<=')) {
+            const val = parseFloat(input.substring(2).trim());
+            if (!isNaN(val)) return stockValue <= val;
+        } else if (input.startsWith('>=')) {
+            const val = parseFloat(input.substring(2).trim());
+            if (!isNaN(val)) return stockValue >= val;
+        } else if (input.startsWith('<')) {
+            const val = parseFloat(input.substring(1).trim());
+            if (!isNaN(val)) return stockValue < val;
+        } else if (input.startsWith('>')) {
+            const val = parseFloat(input.substring(1).trim());
+            if (!isNaN(val)) return stockValue > val;
+        } else if (!isNaN(parseFloat(input))) {
+            return stockValue === parseFloat(input);
+        }
+        return false;
+    });
+};
+
 // Filter Ads Data by Country, Year, Week, ASIN, SKU, and Product Line
 export const filterAdsData = (
     adsData: AdsRecord[],
     filters: FilterState,
     asinMetadata?: Map<string, { sku: string; line: string }>,
-    stockMap?: Map<string, number>
+    stockMap?: Map<string, number>,
+    vendorStockMap?: Map<string, { eu: number; uk: number }>,
+    top50Mode: 'eu' | 'uk' = 'eu'
 ): AdsRecord[] => {
     return adsData.filter(ad => {
         const asin = ad.asin.trim().toUpperCase();
@@ -785,12 +823,19 @@ export const filterAdsData = (
 
         // Stock match
         const stockMatch = checkStockFilter(meta?.sku || '', filters.stock, stockMap);
+        const vendorStockMatch = checkVendorStockFilter(asin, filters.vendorStock, vendorStockMap, top50Mode);
 
-        return countryMatch && yearMatch && weekMatch && asinMatch && skuMatch && lineMatch && stockMatch;
+        return countryMatch && yearMatch && weekMatch && asinMatch && skuMatch && lineMatch && stockMatch && vendorStockMatch;
     });
 };
 
-export const filterData = (data: SalesRecord[], filters: FilterState, stockMap?: Map<string, number>): SalesRecord[] => {
+export const filterData = (
+    data: SalesRecord[],
+    filters: FilterState,
+    stockMap?: Map<string, number>,
+    vendorStockMap?: Map<string, { eu: number; uk: number }>,
+    top50Mode: 'eu' | 'uk' = 'eu'
+): SalesRecord[] => {
     return data.filter(item => {
         // 1. Month Logic: Handle "Apr-23" matching "Apr" filter
         const recordMonth = item.month; // e.g. "Apr-23"
@@ -817,8 +862,9 @@ export const filterData = (data: SalesRecord[], filters: FilterState, stockMap?:
 
         // Stock match
         const stockMatch = checkStockFilter(item.sku, filters.stock, stockMap);
+        const vendorStockMatch = checkVendorStockFilter(item.asin, filters.vendorStock, vendorStockMap, top50Mode);
 
-        return customerMatch && yearMatch && monthMatch && lineMatch && asinMatch && skuMatch && titleMatch && weekMatch && stockMatch;
+        return customerMatch && yearMatch && monthMatch && lineMatch && asinMatch && skuMatch && titleMatch && weekMatch && stockMatch && vendorStockMatch;
     });
 };
 
diff --git a/types.ts b/types.ts
index 2b76f8d..95ceff3 100644
--- a/types.ts
+++ b/types.ts
@@ -24,6 +24,7 @@ export interface FilterState {
   title: string[]; // Added Title filter
   week: string[]; // Added Week filter
   stock: string[]; // Added Stock filter
+  vendorStock: string[]; // Added Vendor Stock filter
 }
 
 export interface GrowthMetric {