In a slow first quarter, the Big Firm racked up a commanding position.     Home  |  Register       Audit & Accounting   May 06, 2019       Top Stories   Deloitte leads in new SEC clients in Q1 by DANIEL HOOD   In a slow first quarter, the Big Firm racked up a commanding position. READ MORE »       Deloitte resigned as Ferrexpo auditor over charity probe delays by DYLAN GRIFFITHS AND THOMAS BIESHEUVEL   Deloitte LLP said it resigned as Ferrexpo Plc