Hindenburg Research is a US-based investment research firm that focuses on providing research and analysis on publicly traded companies. They are known for their investigative and critical approach to the companies they research.
In regards to Adani, it is likely that Hindenburg Research has published research or commentary on Adani Group, which is an Indian multinational conglomerate headquartered in Ahmedabad, India. However, without further context, I cannot provide specific information on their research on Adani.