So, the natural person opening an account for ABC, Inc says its ownership is:
123 Inc - 24%; 456 Inc - 24%; 789 Inc 24%; and 111 Inc 24%. The remaining 4% belongs to another natural person, Bubba Doofus
In order to determine if some combination of shareholders from those companies (or Bubba Doofus) might indirectly own 25 % of ABC we would need the complete list of names of the shareholders for all four plus their respective percentages of ownership. There's one fairly well known trainer who says that. It's very successful in getting the audience excited. (Part of the show for some.)
Clearly, banks are not required to get the percentage of ownership for ABC. However, if it is owned by another legal entity they should get a complete breakdown of of that entity's ownership as an excess of caution? Road apples. The preamble specifically says banks are not required to verify ownership.
This regulation is a cynical attempt to perpetrate a fraud against anyone who truly believes the U.S. should require the disclosure of beneficial owners for creatures of statute and partnerships. Obviously, FATF didn't buy it so it's hard for me to understand why anyone takes it seriously. Yet, it's a foregone conclusion that some examiners will offer their own interpretations further expanding the charade and wasting even more resources.
Just don't expand it as a volunteer...
No matter what improvements you make, it will still be worthless. (Note: It's only the honest people who are going to tell you the truth and nobody cares what honest people own.) Just do what's required, ask the natural person opening the account for the names of any individuals who, directly or indirectly own 25% or more of the legal entity customer and write down what they say as if it was the gospel.
Spend the rest of your bank's finite resources on something that makes a difference.
_________________________
In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.