diff --git a/hyperliquid/exchange.py b/hyperliquid/exchange.py
index ccf35058..d4c417bd 100644
--- a/hyperliquid/exchange.py
+++ b/hyperliquid/exchange.py
@@ -11,6 +11,7 @@
 from hyperliquid.utils.signing import (
     CancelByCloidRequest,
     CancelRequest,
+    Grouping,
     ModifyRequest,
     OidOrCloid,
     OrderRequest,
@@ -106,7 +107,12 @@ def order(
             order["cloid"] = cloid
         return self.bulk_orders([order], builder)
 
-    def bulk_orders(self, order_requests: List[OrderRequest], builder: Optional[BuilderInfo] = None) -> Any:
+    def bulk_orders(
+        self,
+        order_requests: List[OrderRequest],
+        builder: Optional[BuilderInfo] = None,
+        grouping: Grouping = "na",
+    ) -> Any:
         order_wires: List[OrderWire] = [
             order_request_to_order_wire(order, self.info.name_to_asset(order["coin"])) for order in order_requests
         ]
@@ -114,7 +120,7 @@ def bulk_orders(self, order_requests: List[OrderRequest], builder: Optional[Buil
 
         if builder:
             builder["b"] = builder["b"].lower()
-        order_action = order_wires_to_order_action(order_wires, builder)
+        order_action = order_wires_to_order_action(order_wires, builder, grouping)
 
         signature = sign_l1_action(
             self.wallet,
diff --git a/hyperliquid/utils/signing.py b/hyperliquid/utils/signing.py
index d8669792..514e182c 100644
--- a/hyperliquid/utils/signing.py
+++ b/hyperliquid/utils/signing.py
@@ -407,11 +407,11 @@ def order_request_to_order_wire(order: OrderRequest, asset: int) -> OrderWire:
     return order_wire
 
 
-def order_wires_to_order_action(order_wires, builder=None):
+def order_wires_to_order_action(order_wires, builder=None, grouping: Grouping="na"):
     action = {
         "type": "order",
         "orders": order_wires,
-        "grouping": "na",
+        "grouping": grouping,
     }
     if builder:
         action["builder"] = builder