The only reference I can see to a holding company on the MU1R forms is the question "are you a subsidiary?" If you are, it asks for the holding company's RSSD number. You may need to contact the Federal Reserve to obtain a new RSSD for the holding company if one has not been assigned. There is a Y-9 form (if my memory is correct) that can be used to make that request. Once you have the RSSD, you can check the NMLS site for instructions on amending your MU1R filing.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8