[Fixed]-How combine (merge) several number of querysets?

It appears as though you are just trying to get a list of products matching an existing list, so you can use __in, you can then make this a list too if you really need a list of querysets for some reason

 products = Product.objects.filter(company_id__in=ids)
 odd_list = [products]

The added advantage of this is that this performs a single query to your database instead of n queries, it also avoids the need to manually resolve the queryset so that it stays a lazy query and allows you to extend upon this query with further filters as necessary.