from django.utils.functional import wraps
...

def check_company_admin(view):
    @wraps(view)
    def inner(request, slug, *args, **kwargs):
        # Get the company object
        company = get_object_or_404(Company, slug=slug)
        
        # Check and see if the logged in user is admin
        if company.admin_user != request.user:
            return HttpResponseForbidden()
            
        # Return the actual company object to the view
        return view(request, company, *args, **kwargs)
    
    return inner