diff --git a/erpnext/stock/report/stock_ageing/stock_ageing.py b/erpnext/stock/report/stock_ageing/stock_ageing.py
index 93fac84d60a..238b72fa957 100644
--- a/erpnext/stock/report/stock_ageing/stock_ageing.py
+++ b/erpnext/stock/report/stock_ageing/stock_ageing.py
@@ -11,6 +11,7 @@ from frappe.query_builder.functions import Abs, Count
 from frappe.utils import cint, date_diff, flt, get_datetime
 
 from erpnext.stock.doctype.serial_no.serial_no import get_serial_nos
+from erpnext.stock.doctype.warehouse.warehouse import apply_warehouse_filter
 from erpnext.stock.valuation import round_off_if_near_zero
 
 Filters = frappe._dict
@@ -936,9 +937,7 @@ class FIFOSlots:
 			)
 		)
 
-		for field in ["item_code"]:
-			if self.filters.get(field):
-				query = query.where(sle[field] == self.filters.get(field))
+		query = self._apply_filter(query, sle, "item_code")
 
 		if self.filters.get("warehouse"):
 			query = self._get_warehouse_conditions(sle, query)
@@ -985,9 +984,7 @@ class FIFOSlots:
 				)
 			)
 
-			for field in ["item_code"]:
-				if self.filters.get(field):
-					query = query.where(sle[field] == self.filters.get(field))
+			query = self._apply_filter(query, sle, "item_code")
 
 			if self.filters.get("warehouse"):
 				query = self._get_warehouse_conditions(sle, query)
@@ -1020,27 +1017,25 @@ class FIFOSlots:
 			"has_batch_no",
 		)
 
-		if self.filters.get("item_code"):
-			item = item.where(item_table.item_code == self.filters.get("item_code"))
+		item = self._apply_filter(item, item_table, "item_code")
 
 		if self.filters.get("brand"):
 			item = item.where(item_table.brand == self.filters.get("brand"))
 
 		return item
 
+	def _apply_filter(self, query, table, fieldname: str):
+		filter_value = self.filters.get(fieldname)
+		if not filter_value:
+			return query
+
+		if isinstance(filter_value, list | tuple | set):
+			return query.where(table[fieldname].isin(filter_value))
+
+		return query.where(table[fieldname] == filter_value)
+
 	def _get_warehouse_conditions(self, sle, sle_query) -> str:
-		warehouse = frappe.qb.DocType("Warehouse")
-		lft, rgt = frappe.db.get_value("Warehouse", self.filters.get("warehouse"), ["lft", "rgt"])
-
-		warehouse_results = (
-			frappe.qb.from_(warehouse)
-			.select("name")
-			.where((warehouse.lft >= lft) & (warehouse.rgt <= rgt))
-			.run()
-		)
-		warehouse_results = [x[0] for x in warehouse_results]
-
-		return sle_query.where(sle.warehouse.isin(warehouse_results))
+		return apply_warehouse_filter(sle_query, sle, self.filters)
 
 	def prepare_stock_reco_voucher_wise_count(self):
 		self.stock_reco_voucher_wise_count = frappe._dict()
diff --git a/erpnext/stock/report/stock_ageing/test_stock_ageing.py b/erpnext/stock/report/stock_ageing/test_stock_ageing.py
index 601524c74e9..1c61306125e 100644
--- a/erpnext/stock/report/stock_ageing/test_stock_ageing.py
+++ b/erpnext/stock/report/stock_ageing/test_stock_ageing.py
@@ -129,6 +129,18 @@ class TestStockAgeing(FrappeTestCase):
 		self.assertEqual(queue[0][0], 10.0)
 		self.assertEqual(queue[1][0], 10.0)
 
+	def test_item_filter_supports_multi_select_values(self):
+		bundle = frappe.qb.DocType("Serial and Batch Bundle")
+		query = frappe.qb.from_(bundle).select(bundle.name)
+
+		filtered_query = FIFOSlots(frappe._dict(item_code=["Item A"]), [])._apply_filter(
+			query, bundle, "item_code"
+		)
+
+		sql = filtered_query.get_sql()
+		self.assertIn(" IN ", sql)
+		self.assertNotIn("=[", sql)
+
 	def test_basic_stock_reconciliation(self):
 		"""
 		Ledger (same wh): [+30, reco reset >> 50, -10]