This week’s top stories on Business Chief cover leadership changes and AI developments. 7-Eleven, Inc. has named Mauricio Leyva as its next CEO, effective 1 August 2026. A new report from HCLTech, The Blueprint for AI Leadership, surveyed 500 business and IT leaders and found that 90% say gen AI and agentic AI are transforming workflows, yet only 18% report meaningful revenue impact. Australia's Leading Edge Data Centres has appointed Joe Craparotta as Chief Executive Officer, bringing more than 35 years of experience. Cracker Barrel has announced that CEO Julie Masino will step down in August, with former CEO of Bloomin’ Brands David Deno to oversee her position, following public backlash over the company’s rebrand strategy. OpenAI has stated that a rogue AI model spent several days hacking systems across company logins and devices, marking the first time a program has executed a fully autonomous AI hack.