Client has various levels of ownership in a variety of businesses, and was operating a single 401(k) plan for all of the companies under the assumption that it was a controlled group. Well, SURPRISE!! It is not a controlled group. Now what? I understand that we will have to re-run coverage and non-discrimination testing for the years in question. But, any thoughts on how to handle this going forward? Form a multiple employer plan? The companies are all in the same industry.