By Benjamin Horney (March 26, 2019, 7:15 PM EDT) -- Investors from Qatar are not entirely pleased with the potential merger of Deutsche Bank AG and Commerzbank AG, with Bloomberg reporting Monday that "top Qatari shareholders" are worried a deal might lead to the dilution of their ownership holdings in Deutsche. According to the report, the unidentified Qatari investors desire some kind of concessions, although it was not clear what those might be, before agreeing to back a merger. Private equity firm Cerberus Capital, which owns stakes in both banks, is on board with a merger, the report said. Reports earlier this month said that Citibank and Goldman Sachs Group Inc. had been tapped to help as the two lenders continue discussions. Deutsche is working with law firm Freshfields Bruckhaus Deringer LLP, while Commerzbank is being advised by Hengeler Mueller. Rumors about a potential tie-up between the pair, as well as the German government's opinion about such a deal, have swirled since June 2018....