diff --git a/inventory/src/App.tsx b/inventory/src/App.tsx
index b0b5324..898750f 100644
--- a/inventory/src/App.tsx
+++ b/inventory/src/App.tsx
@@ -13,6 +13,8 @@ import { useEffect } from 'react';
 import config from './config';
 import { RequireAuth } from './components/auth/RequireAuth';
 import Forecasting from "@/pages/Forecasting";
+import { Vendors } from '@/pages/Vendors';
+import { Categories } from '@/pages/Categories';
 
 const queryClient = new QueryClient();
 
@@ -58,6 +60,8 @@ function App() {
         }>
           <Route path="/" element={<Dashboard />} />
           <Route path="/products" element={<Products />} />
+          <Route path="/categories" element={<Categories />} />
+          <Route path="/vendors" element={<Vendors />} />
           <Route path="/orders" element={<Orders />} />
           <Route path="/purchase-orders" element={<PurchaseOrders />} />
           <Route path="/analytics" element={<Analytics />} />
diff --git a/inventory/src/components/layout/AppSidebar.tsx b/inventory/src/components/layout/AppSidebar.tsx
index 3464a15..9e5e471 100644
--- a/inventory/src/components/layout/AppSidebar.tsx
+++ b/inventory/src/components/layout/AppSidebar.tsx
@@ -6,6 +6,8 @@ import {
   Box,
   ClipboardList,
   LogOut,
+  Users,
+  Tags,
 } from "lucide-react";
 import { IconCrystalBall } from "@tabler/icons-react";
 import {
@@ -33,6 +35,16 @@ const items = [
     icon: Package,
     url: "/products",
   },
+  {
+    title: "Categories",
+    icon: Tags,
+    url: "/categories",
+  },
+  {
+    title: "Vendors",
+    icon: Users,
+    url: "/vendors",
+  },
   {
     title: "Forecasting",
     icon: IconCrystalBall,
diff --git a/inventory/src/pages/Categories.tsx b/inventory/src/pages/Categories.tsx
new file mode 100644
index 0000000..c440b1d
--- /dev/null
+++ b/inventory/src/pages/Categories.tsx
@@ -0,0 +1,283 @@
+import { useState } from "react";
+import { useQuery, keepPreviousData } from "@tanstack/react-query";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Input } from "@/components/ui/input";
+import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@/components/ui/table";
+import { Badge } from "@/components/ui/badge";
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
+import { Pagination, PaginationContent, PaginationItem, PaginationLink, PaginationNext, PaginationPrevious } from "@/components/ui/pagination";
+import { motion } from "motion/react";
+import config from "../config";
+
+interface Category {
+  category_id: number;
+  name: string;
+  description: string;
+  parent_category?: string;
+  product_count: number;
+  total_value: number;
+  avg_margin: number;
+  turnover_rate: number;
+  growth_rate: number;
+  status: string;
+}
+
+interface CategoryFilters {
+  search: string;
+  parent: string;
+  performance: string;
+}
+
+export function Categories() {
+  const [page, setPage] = useState(1);
+  const [sortColumn, setSortColumn] = useState<keyof Category>("name");
+  const [sortDirection, setSortDirection] = useState<"asc" | "desc">("asc");
+  const [filters, setFilters] = useState<CategoryFilters>({
+    search: "",
+    parent: "all",
+    performance: "all",
+  });
+
+  const { data, isLoading } = useQuery({
+    queryKey: ["categories", page, sortColumn, sortDirection, filters],
+    queryFn: async () => {
+      const searchParams = new URLSearchParams({
+        page: page.toString(),
+        limit: "50",
+        sortColumn: sortColumn.toString(),
+        sortDirection,
+        ...filters.search && { search: filters.search },
+        ...filters.parent !== "all" && { parent: filters.parent },
+        ...filters.performance !== "all" && { performance: filters.performance },
+      });
+
+      const response = await fetch(`${config.apiUrl}/categories?${searchParams}`);
+      if (!response.ok) throw new Error("Failed to fetch categories");
+      return response.json();
+    },
+    placeholderData: keepPreviousData,
+  });
+
+  const handleSort = (column: keyof Category) => {
+    setSortDirection(prev => {
+      if (sortColumn !== column) return "asc";
+      return prev === "asc" ? "desc" : "asc";
+    });
+    setSortColumn(column);
+  };
+
+  const getPerformanceBadge = (growth: number) => {
+    if (growth >= 20) return <Badge variant="default">High Growth</Badge>;
+    if (growth >= 5) return <Badge variant="secondary">Growing</Badge>;
+    if (growth >= -5) return <Badge variant="outline">Stable</Badge>;
+    return <Badge variant="destructive">Declining</Badge>;
+  };
+
+  const formatCurrency = (value: number) => {
+    return new Intl.NumberFormat('en-US', {
+      style: 'currency',
+      currency: 'USD',
+      minimumFractionDigits: 0,
+      maximumFractionDigits: 0,
+    }).format(value);
+  };
+
+  return (
+    <motion.div layout className="container mx-auto py-6 space-y-4">
+      <div className="flex items-center justify-between">
+        <h1 className="text-3xl font-bold tracking-tight">Categories</h1>
+        <div className="text-sm text-muted-foreground">
+          {data?.pagination.total.toLocaleString() ?? "..."} categories
+        </div>
+      </div>
+
+      <div className="grid gap-4 md:grid-cols-4">
+        <Card>
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium">Total Categories</CardTitle>
+          </CardHeader>
+          <CardContent>
+            <div className="text-2xl font-bold">{data?.stats.totalCategories ?? "..."}</div>
+            <p className="text-xs text-muted-foreground">
+              {data?.stats.activeCategories ?? "..."} active
+            </p>
+          </CardContent>
+        </Card>
+
+        <Card>
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium">Total Value</CardTitle>
+          </CardHeader>
+          <CardContent>
+            <div className="text-2xl font-bold">{data?.stats.totalValue ? formatCurrency(data.stats.totalValue) : "..."}</div>
+            <p className="text-xs text-muted-foreground">
+              Inventory value
+            </p>
+          </CardContent>
+        </Card>
+
+        <Card>
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium">Avg Margin</CardTitle>
+          </CardHeader>
+          <CardContent>
+            <div className="text-2xl font-bold">{data?.stats.avgMargin?.toFixed(1) ?? "..."}%</div>
+            <p className="text-xs text-muted-foreground">
+              Across all categories
+            </p>
+          </CardContent>
+        </Card>
+
+        <Card>
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium">Avg Growth</CardTitle>
+          </CardHeader>
+          <CardContent>
+            <div className="text-2xl font-bold">{data?.stats.avgGrowth?.toFixed(1) ?? "..."}%</div>
+            <p className="text-xs text-muted-foreground">
+              Year over year
+            </p>
+          </CardContent>
+        </Card>
+      </div>
+
+      <div className="flex items-center justify-between">
+        <div className="flex flex-1 items-center space-x-2">
+          <Input
+            placeholder="Search categories..."
+            value={filters.search}
+            onChange={(e) => setFilters(prev => ({ ...prev, search: e.target.value }))}
+            className="h-8 w-[150px] lg:w-[250px]"
+          />
+          <Select
+            value={filters.parent}
+            onValueChange={(value) => setFilters(prev => ({ ...prev, parent: value }))}
+          >
+            <SelectTrigger className="h-8 w-[180px]">
+              <SelectValue placeholder="Parent Category" />
+            </SelectTrigger>
+            <SelectContent>
+              <SelectItem value="all">All Categories</SelectItem>
+              <SelectItem value="none">Top Level Only</SelectItem>
+              {data?.parentCategories?.map((parent: string) => (
+                <SelectItem key={parent} value={parent}>{parent}</SelectItem>
+              ))}
+            </SelectContent>
+          </Select>
+          <Select
+            value={filters.performance}
+            onValueChange={(value) => setFilters(prev => ({ ...prev, performance: value }))}
+          >
+            <SelectTrigger className="h-8 w-[150px]">
+              <SelectValue placeholder="Performance" />
+            </SelectTrigger>
+            <SelectContent>
+              <SelectItem value="all">All Performance</SelectItem>
+              <SelectItem value="high_growth">High Growth</SelectItem>
+              <SelectItem value="growing">Growing</SelectItem>
+              <SelectItem value="stable">Stable</SelectItem>
+              <SelectItem value="declining">Declining</SelectItem>
+            </SelectContent>
+          </Select>
+        </div>
+      </div>
+
+      <div className="rounded-md border">
+        <Table>
+          <TableHeader>
+            <TableRow>
+              <TableHead onClick={() => handleSort("name")} className="cursor-pointer">Name</TableHead>
+              <TableHead onClick={() => handleSort("parent_category")} className="cursor-pointer">Parent</TableHead>
+              <TableHead onClick={() => handleSort("product_count")} className="cursor-pointer">Products</TableHead>
+              <TableHead onClick={() => handleSort("total_value")} className="cursor-pointer">Value</TableHead>
+              <TableHead onClick={() => handleSort("avg_margin")} className="cursor-pointer">Margin</TableHead>
+              <TableHead onClick={() => handleSort("turnover_rate")} className="cursor-pointer">Turnover</TableHead>
+              <TableHead onClick={() => handleSort("growth_rate")} className="cursor-pointer">Growth</TableHead>
+              <TableHead onClick={() => handleSort("status")} className="cursor-pointer">Status</TableHead>
+            </TableRow>
+          </TableHeader>
+          <TableBody>
+            {isLoading ? (
+              <TableRow>
+                <TableCell colSpan={8} className="text-center py-8">
+                  Loading categories...
+                </TableCell>
+              </TableRow>
+            ) : data?.categories.map((category: Category) => (
+              <TableRow key={category.category_id}>
+                <TableCell>
+                  <div className="font-medium">{category.name}</div>
+                  <div className="text-sm text-muted-foreground">{category.description}</div>
+                </TableCell>
+                <TableCell>{category.parent_category || "—"}</TableCell>
+                <TableCell>{category.product_count.toLocaleString()}</TableCell>
+                <TableCell>{formatCurrency(category.total_value)}</TableCell>
+                <TableCell>{category.avg_margin.toFixed(1)}%</TableCell>
+                <TableCell>{category.turnover_rate.toFixed(1)}x</TableCell>
+                <TableCell>
+                  <div className="flex items-center gap-2">
+                    {category.growth_rate.toFixed(1)}%
+                    {getPerformanceBadge(category.growth_rate)}
+                  </div>
+                </TableCell>
+                <TableCell>{category.status}</TableCell>
+              </TableRow>
+            ))}
+            {!isLoading && !data?.categories.length && (
+              <TableRow>
+                <TableCell colSpan={8} className="text-center py-8 text-muted-foreground">
+                  No categories found
+                </TableCell>
+              </TableRow>
+            )}
+          </TableBody>
+        </Table>
+      </div>
+
+      {data?.pagination.pages > 1 && (
+        <div className="flex justify-center">
+          <Pagination>
+            <PaginationContent>
+              <PaginationItem>
+                <PaginationPrevious
+                  href="#"
+                  onClick={(e) => {
+                    e.preventDefault();
+                    setPage(p => Math.max(1, p - 1));
+                  }}
+                  aria-disabled={page === 1}
+                />
+              </PaginationItem>
+              {Array.from({ length: data.pagination.pages }, (_, i) => i + 1).map((p) => (
+                <PaginationItem key={p}>
+                  <PaginationLink
+                    href="#"
+                    isActive={page === p}
+                    onClick={(e) => {
+                      e.preventDefault();
+                      setPage(p);
+                    }}
+                  >
+                    {p}
+                  </PaginationLink>
+                </PaginationItem>
+              ))}
+              <PaginationItem>
+                <PaginationNext
+                  href="#"
+                  onClick={(e) => {
+                    e.preventDefault();
+                    setPage(p => Math.min(data.pagination.pages, p + 1));
+                  }}
+                  aria-disabled={page === data.pagination.pages}
+                />
+              </PaginationItem>
+            </PaginationContent>
+          </Pagination>
+        </div>
+      )}
+    </motion.div>
+  );
+}
+
+export default Categories; 
\ No newline at end of file
diff --git a/inventory/src/pages/Vendors.tsx b/inventory/src/pages/Vendors.tsx
new file mode 100644
index 0000000..3167159
--- /dev/null
+++ b/inventory/src/pages/Vendors.tsx
@@ -0,0 +1,274 @@
+import { useState } from "react";
+import { useQuery, keepPreviousData } from "@tanstack/react-query";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Input } from "@/components/ui/input";
+import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@/components/ui/table";
+import { Badge } from "@/components/ui/badge";
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
+import { Pagination, PaginationContent, PaginationItem, PaginationLink, PaginationNext, PaginationPrevious } from "@/components/ui/pagination";
+import { motion } from "motion/react";
+import config from "../config";
+
+interface Vendor {
+  vendor_id: number;
+  name: string;
+  contact_name: string;
+  email: string;
+  phone: string;
+  status: string;
+  avg_lead_time_days: number;
+  on_time_delivery_rate: number;
+  order_fill_rate: number;
+  total_orders: number;
+  active_products: number;
+}
+
+interface VendorFilters {
+  search: string;
+  status: string;
+  performance: string;
+}
+
+export function Vendors() {
+  const [page, setPage] = useState(1);
+  const [sortColumn, setSortColumn] = useState<keyof Vendor>("name");
+  const [sortDirection, setSortDirection] = useState<"asc" | "desc">("asc");
+  const [filters, setFilters] = useState<VendorFilters>({
+    search: "",
+    status: "all",
+    performance: "all",
+  });
+
+  const { data, isLoading } = useQuery({
+    queryKey: ["vendors", page, sortColumn, sortDirection, filters],
+    queryFn: async () => {
+      const searchParams = new URLSearchParams({
+        page: page.toString(),
+        limit: "50",
+        sortColumn: sortColumn.toString(),
+        sortDirection,
+        ...filters.search && { search: filters.search },
+        ...filters.status !== "all" && { status: filters.status },
+        ...filters.performance !== "all" && { performance: filters.performance },
+      });
+
+      const response = await fetch(`${config.apiUrl}/vendors?${searchParams}`);
+      if (!response.ok) throw new Error("Failed to fetch vendors");
+      return response.json();
+    },
+    placeholderData: keepPreviousData,
+  });
+
+  const handleSort = (column: keyof Vendor) => {
+    setSortDirection(prev => {
+      if (sortColumn !== column) return "asc";
+      return prev === "asc" ? "desc" : "asc";
+    });
+    setSortColumn(column);
+  };
+
+  const getPerformanceBadge = (fillRate: number) => {
+    if (fillRate >= 95) return <Badge variant="default">Excellent</Badge>;
+    if (fillRate >= 85) return <Badge variant="secondary">Good</Badge>;
+    if (fillRate >= 75) return <Badge variant="outline">Fair</Badge>;
+    return <Badge variant="destructive">Poor</Badge>;
+  };
+
+  return (
+    <motion.div layout className="container mx-auto py-6 space-y-4">
+      <div className="flex items-center justify-between">
+        <h1 className="text-3xl font-bold tracking-tight">Vendors</h1>
+        <div className="text-sm text-muted-foreground">
+          {data?.pagination.total.toLocaleString() ?? "..."} vendors
+        </div>
+      </div>
+
+      <div className="grid gap-4 md:grid-cols-4">
+        <Card>
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium">Total Vendors</CardTitle>
+          </CardHeader>
+          <CardContent>
+            <div className="text-2xl font-bold">{data?.stats.totalVendors ?? "..."}</div>
+            <p className="text-xs text-muted-foreground">
+              {data?.stats.activeVendors ?? "..."} active
+            </p>
+          </CardContent>
+        </Card>
+
+        <Card>
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium">Avg Lead Time</CardTitle>
+          </CardHeader>
+          <CardContent>
+            <div className="text-2xl font-bold">{data?.stats.avgLeadTime?.toFixed(1) ?? "..."} days</div>
+            <p className="text-xs text-muted-foreground">
+              Across all vendors
+            </p>
+          </CardContent>
+        </Card>
+
+        <Card>
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium">Fill Rate</CardTitle>
+          </CardHeader>
+          <CardContent>
+            <div className="text-2xl font-bold">{data?.stats.avgFillRate?.toFixed(1) ?? "..."}%</div>
+            <p className="text-xs text-muted-foreground">
+              Average order fill rate
+            </p>
+          </CardContent>
+        </Card>
+
+        <Card>
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium">On-Time Delivery</CardTitle>
+          </CardHeader>
+          <CardContent>
+            <div className="text-2xl font-bold">{data?.stats.avgOnTimeDelivery?.toFixed(1) ?? "..."}%</div>
+            <p className="text-xs text-muted-foreground">
+              Average on-time rate
+            </p>
+          </CardContent>
+        </Card>
+      </div>
+
+      <div className="flex items-center justify-between">
+        <div className="flex flex-1 items-center space-x-2">
+          <Input
+            placeholder="Search vendors..."
+            value={filters.search}
+            onChange={(e) => setFilters(prev => ({ ...prev, search: e.target.value }))}
+            className="h-8 w-[150px] lg:w-[250px]"
+          />
+          <Select
+            value={filters.status}
+            onValueChange={(value) => setFilters(prev => ({ ...prev, status: value }))}
+          >
+            <SelectTrigger className="h-8 w-[150px]">
+              <SelectValue placeholder="Status" />
+            </SelectTrigger>
+            <SelectContent>
+              <SelectItem value="all">All Status</SelectItem>
+              <SelectItem value="active">Active</SelectItem>
+              <SelectItem value="inactive">Inactive</SelectItem>
+              <SelectItem value="pending">Pending</SelectItem>
+            </SelectContent>
+          </Select>
+          <Select
+            value={filters.performance}
+            onValueChange={(value) => setFilters(prev => ({ ...prev, performance: value }))}
+          >
+            <SelectTrigger className="h-8 w-[150px]">
+              <SelectValue placeholder="Performance" />
+            </SelectTrigger>
+            <SelectContent>
+              <SelectItem value="all">All Performance</SelectItem>
+              <SelectItem value="excellent">Excellent</SelectItem>
+              <SelectItem value="good">Good</SelectItem>
+              <SelectItem value="fair">Fair</SelectItem>
+              <SelectItem value="poor">Poor</SelectItem>
+            </SelectContent>
+          </Select>
+        </div>
+      </div>
+
+      <div className="rounded-md border">
+        <Table>
+          <TableHeader>
+            <TableRow>
+              <TableHead onClick={() => handleSort("name")} className="cursor-pointer">Name</TableHead>
+              <TableHead onClick={() => handleSort("contact_name")} className="cursor-pointer">Contact</TableHead>
+              <TableHead onClick={() => handleSort("status")} className="cursor-pointer">Status</TableHead>
+              <TableHead onClick={() => handleSort("avg_lead_time_days")} className="cursor-pointer">Lead Time</TableHead>
+              <TableHead onClick={() => handleSort("on_time_delivery_rate")} className="cursor-pointer">On-Time Rate</TableHead>
+              <TableHead onClick={() => handleSort("order_fill_rate")} className="cursor-pointer">Fill Rate</TableHead>
+              <TableHead onClick={() => handleSort("total_orders")} className="cursor-pointer">Orders</TableHead>
+              <TableHead onClick={() => handleSort("active_products")} className="cursor-pointer">Products</TableHead>
+            </TableRow>
+          </TableHeader>
+          <TableBody>
+            {isLoading ? (
+              <TableRow>
+                <TableCell colSpan={8} className="text-center py-8">
+                  Loading vendors...
+                </TableCell>
+              </TableRow>
+            ) : data?.vendors.map((vendor: Vendor) => (
+              <TableRow key={vendor.vendor_id}>
+                <TableCell className="font-medium">{vendor.name}</TableCell>
+                <TableCell>
+                  <div>{vendor.contact_name}</div>
+                  <div className="text-sm text-muted-foreground">{vendor.email}</div>
+                </TableCell>
+                <TableCell>{vendor.status}</TableCell>
+                <TableCell>{vendor.avg_lead_time_days.toFixed(1)} days</TableCell>
+                <TableCell>{vendor.on_time_delivery_rate.toFixed(1)}%</TableCell>
+                <TableCell>
+                  <div className="flex items-center gap-2">
+                    {vendor.order_fill_rate.toFixed(1)}%
+                    {getPerformanceBadge(vendor.order_fill_rate)}
+                  </div>
+                </TableCell>
+                <TableCell>{vendor.total_orders.toLocaleString()}</TableCell>
+                <TableCell>{vendor.active_products.toLocaleString()}</TableCell>
+              </TableRow>
+            ))}
+            {!isLoading && !data?.vendors.length && (
+              <TableRow>
+                <TableCell colSpan={8} className="text-center py-8 text-muted-foreground">
+                  No vendors found
+                </TableCell>
+              </TableRow>
+            )}
+          </TableBody>
+        </Table>
+      </div>
+
+      {data?.pagination.pages > 1 && (
+        <div className="flex justify-center">
+          <Pagination>
+            <PaginationContent>
+              <PaginationItem>
+                <PaginationPrevious
+                  href="#"
+                  onClick={(e) => {
+                    e.preventDefault();
+                    setPage(p => Math.max(1, p - 1));
+                  }}
+                  aria-disabled={page === 1}
+                />
+              </PaginationItem>
+              {Array.from({ length: data.pagination.pages }, (_, i) => i + 1).map((p) => (
+                <PaginationItem key={p}>
+                  <PaginationLink
+                    href="#"
+                    isActive={page === p}
+                    onClick={(e) => {
+                      e.preventDefault();
+                      setPage(p);
+                    }}
+                  >
+                    {p}
+                  </PaginationLink>
+                </PaginationItem>
+              ))}
+              <PaginationItem>
+                <PaginationNext
+                  href="#"
+                  onClick={(e) => {
+                    e.preventDefault();
+                    setPage(p => Math.min(data.pagination.pages, p + 1));
+                  }}
+                  aria-disabled={page === data.pagination.pages}
+                />
+              </PaginationItem>
+            </PaginationContent>
+          </Pagination>
+        </div>
+      )}
+    </motion.div>
+  );
+}
+
+export default Vendors; 
\ No newline at end of file