Are all Rolled Oats , also Whole grain oats?!

Are all Rolled Oats , also Whole grain oats?

I was reading the label on my oatmeal. I have one container of store brand oatmeal, and one container of Quaker oatmeal. The quaker container says Whole Grain Oats on the the conatiner, and the ingredients also say Whole grain rolled oats. The store brand just says Old Fashioned Oats, and the ingredients says rolled oats. It does not say Whole grain rolled oats. So I am wondering if it all rolled oats are also whole grains, or if I should only be buying quaker oatmeal.