Companies A, B,C, comprisee a control group and all had adopted a 401k plan. Company C is no longer under common control and wishes to establish a plan. They would like to keep all existing assets and move into the new plan without giving participants the ability to roll money out( larger assets, better pricing). Can they move the participant accounts without consent?

Why not do a spin off of plan assets from current plan to the plan established by C? May need to file 5310 , deal with outstanding loans, benefit options, but its doable.