PF Registration - Group Of Companies

Dear Seniors,
I need your guidance in below mentioned case.
We are a group of companies running 5 different businesses (companies) under the one roof. We have two employees in one company. The employees are demanding to star PF deduction & management is also willing to start their PF deduction.
But can we ope PF account for that company as the employee strength is below 10.
Kindly suggest the right way.

hii
first clarify what is your employee count in your organization?

As there is group of companies hope each and every company will have different names.
Even if the employee strength is less than 10 you can opt for voluntary registration