diff --git a/src/components/companies/company-columns.tsx b/src/components/companies/company-columns.tsx
index 869041b..61a7099 100644
--- a/src/components/companies/company-columns.tsx
+++ b/src/components/companies/company-columns.tsx
@@ -4,6 +4,7 @@ import Link from 'next/link';
 import { MoreHorizontal, Pencil, Archive, Eye } from 'lucide-react';
 import type { ColumnDef } from '@tanstack/react-table';
 
+import { Badge } from '@/components/ui/badge';
 import { Button } from '@/components/ui/button';
 import {
   DropdownMenu,
@@ -12,7 +13,6 @@ import {
   DropdownMenuTrigger,
 } from '@/components/ui/dropdown-menu';
 
-// TODO: add member/yacht counts once the list endpoint returns them via a join.
 export interface CompanyRow {
   id: string;
   name: string;
@@ -27,6 +27,8 @@ export interface CompanyRow {
   archivedAt: string | null;
   createdAt: string;
   updatedAt: string;
+  memberCount?: number;
+  yachtCount?: number;
 }
 
 const STATUS_COLORS: Record<string, string> = {
@@ -88,6 +90,28 @@ export function getCompanyColumns({
         return <span className="text-sm">{value}</span>;
       },
     },
+    {
+      id: 'memberCount',
+      header: 'Members',
+      enableSorting: false,
+      size: 88,
+      cell: ({ row }) => {
+        const n = row.original.memberCount ?? 0;
+        if (n === 0) return <span className="text-muted-foreground">—</span>;
+        return <Badge variant="secondary">{n}</Badge>;
+      },
+    },
+    {
+      id: 'yachtCount',
+      header: 'Yachts',
+      enableSorting: false,
+      size: 88,
+      cell: ({ row }) => {
+        const n = row.original.yachtCount ?? 0;
+        if (n === 0) return <span className="text-muted-foreground">—</span>;
+        return <Badge variant="secondary">{n}</Badge>;
+      },
+    },
     {
       id: 'status',
       accessorKey: 'status',
diff --git a/src/lib/services/companies.service.ts b/src/lib/services/companies.service.ts
index f902f7f..d2ec681 100644
--- a/src/lib/services/companies.service.ts
+++ b/src/lib/services/companies.service.ts
@@ -1,7 +1,8 @@
-import { and, eq, ilike, or, sql } from 'drizzle-orm';
+import { and, count, eq, ilike, inArray, isNull, or, sql } from 'drizzle-orm';
 import { db } from '@/lib/db';
-import { companies, companyTags } from '@/lib/db/schema/companies';
+import { companies, companyMemberships, companyTags } from '@/lib/db/schema/companies';
 import type { Company } from '@/lib/db/schema/companies';
+import { yachts } from '@/lib/db/schema/yachts';
 import { withTransaction } from '@/lib/db/utils';
 import { buildListQuery } from '@/lib/db/query-builder';
 import { createAuditLog } from '@/lib/audit';
@@ -238,7 +239,41 @@ export async function listCompanies(portId: string, query: ListCompaniesInput) {
     archivedAtColumn: companies.archivedAt,
   });
 
-  return result;
+  if (result.data.length === 0) return result;
+
+  const ids = result.data.map((r) => r.id);
+
+  const [memberCounts, yachtCounts] = await Promise.all([
+    db
+      .select({ companyId: companyMemberships.companyId, count: count() })
+      .from(companyMemberships)
+      .where(and(inArray(companyMemberships.companyId, ids), isNull(companyMemberships.endDate)))
+      .groupBy(companyMemberships.companyId),
+    db
+      .select({ ownerId: yachts.currentOwnerId, count: count() })
+      .from(yachts)
+      .where(
+        and(
+          eq(yachts.portId, portId),
+          eq(yachts.currentOwnerType, 'company'),
+          inArray(yachts.currentOwnerId, ids),
+          isNull(yachts.archivedAt),
+        ),
+      )
+      .groupBy(yachts.currentOwnerId),
+  ]);
+
+  const memberCountMap = new Map(memberCounts.map((r) => [r.companyId, r.count]));
+  const yachtCountMap = new Map(yachtCounts.map((r) => [r.ownerId, r.count]));
+
+  return {
+    ...result,
+    data: result.data.map((row) => ({
+      ...row,
+      memberCount: memberCountMap.get(row.id) ?? 0,
+      yachtCount: yachtCountMap.get(row.id) ?? 0,
+    })),
+  };
 }
 
 // ─── Autocomplete ────────────────────────────────────────────────────────────