diff --git a/packages/markitdown/src/markitdown/converters/_pptx_converter.py b/packages/markitdown/src/markitdown/converters/_pptx_converter.py
index bea1226..da81f75 100644
--- a/packages/markitdown/src/markitdown/converters/_pptx_converter.py
+++ b/packages/markitdown/src/markitdown/converters/_pptx_converter.py
@@ -160,10 +160,12 @@ class PptxConverter(DocumentConverter):
 
                 # Group Shapes
                 if shape.shape_type == pptx.enum.shapes.MSO_SHAPE_TYPE.GROUP:
-                    for subshape in shape.shapes:
+                    sorted_shapes = sorted(shape.shapes, key=attrgetter('top', 'left'))
+                    for subshape in sorted_shapes:
                         get_shape_content(subshape, **kwargs)
-
-            for shape in slide.shapes:
+            
+            sorted_shapes = sorted(slide.shapes, key=attrgetter('top', 'left'))
+            for shape in sorted_shapes:
                 get_shape_content(shape, **kwargs)
 
             md_content = md_content.strip()