Uhh because they need the NOBO to provide the names and contact info from them, that is why they run them for proxy votes. They also want to know the percentage of the OBO versus the NOBO to understand their investor base. there is a host of reasons for pulling the data but none of them are for the purpose of share accounting any longer as that is now a direct result of the CNS (Continuous Net Settlement) system that generates all the necessary data of actual shares.
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