China’s Ant Group Chief Executive Officer Simon Hu has unexpectedly resigned amid a regulatory-driven overhaul of the financial technology giant’s business, the first top management exit since a scuppered $37 billion initial public offering. Hu, who was named chief executive of the Alibaba Group Holding affiliate in 2019, will be replaced by company veteran and Executive Chairman Eric Jing, Ant said in a statement on Friday. Hu’s exit from the company comes as Ant is working on plans to shift to a financial holding company structure following intense regulatory pressure to subject it to rules and capital requirements similar to those for banks. That pressure abruptly scuttled Ant’s IPO last year, which would have been the world’s biggest. Hu resigned for personal reasons, Ant said in a statement, without elaborating. “Following the board’s thorough discussions, we have decided to respect Simon’s personal request and support him fully in his new …