Obligor = debtor = LBHI (likely via the DTCC) has to furnish the list of owners to the indentured trustee.
Definition of 'Obligor'
A person or entity who is legally, or contractually, obliged to provide some benefit or payment to another. In the financial context, the term obligor refers to a bond issuer, who is contractually bound to make all principal repayments and interest payments on outstanding debt. The recipient of the benefit or payment is known as the obligee.