What is the fine-grained topic of the following text: Walmart rose about 2 percent after Sainsbury’s agreed to buy the UK arm of Walmart, Asda, for about $10 billion, while Marriott Vacations Worldwide said it would buy timeshare operator ILG Inc for $4.7 billion, sending the target company’s shares up 4.5 percent. Only return the topic.
Major business acquisitions involving Walmart, Asda, Marriott Vacations Worldwide, and ILG Inc.