What is the world's largest learning company?

Could you please elaborate on what you mean by the "world's largest learning company"? Are you referring to an organization that specializes in providing educational services or training programs on a global scale? Are you interested in knowing about the company's size in terms of revenue, number of employees, or perhaps the number of learners it has reached worldwide? It's also important to consider the industry context and whether you're focusing on traditional educational institutions or more modern, technology-driven learning platforms. Clarifying these points would help me provide a more accurate and informative answer.