We're not drilling down past the first layer of ownership. I don't believe that's requirement.
You may want to rethink that approach:
Question 18: Collection of beneficial ownership information
Q: Must covered financial institutions collect beneficial ownership information on all of the beneficial owners of a legal entity customer?
A: Covered financial institutions must collect and verify the beneficial ownership information of each person who meets the definition under the ownership prong, and of one person under the control prong. Under the ownership prong, covered financial institutions are
required to collect the beneficial ownership information only for each individual who owns directly or indirectly 25% or more of the equity interest of a legal entity and under the control prong, for one individual with significant responsibility to control, manage, or direct the entity. However, the rule recognizes that there may be instances when no one individual owns 25% or more of the equity interest of the legal entity; in such instances, the financial institution is still required to collect the required information for one individual who controls, manages, or directs the legal entity customer.