M. M. Warburg & CO KGaA is a German private bank, based in Hamburg. It is a family-owned bank founded in 1798 by brothers Moses Marcus Warburg and Gerson Warburg of the Warburg family. The bank was seized and Aryanized by the Nazis. From Wikipedia
Opposition accuses Scholz of political influence and misstatements in Hamburg's investigation of tax fraud cases involving major banks.