Controlled group change

[Guest jim williams]

We have a 401(k) plan that was originally established on a prototype by a controlled group of real estate companies. Due to a change in ownership, 2 of the companies are no longer part of the controlled group.

Do I have other options besides treating the plan as a multiple employer plan requiring a change to a volume submitter document and testing separately for nondiscrimination requirements? Or establish separate single employer plans for the 2 companies that were formerly part of the controlled group?

Is it possible real estate companies can be classified as professional service corps for affiliated service purposes?