What is the fine-grained topic of the following text: Ecclestone holds 5.3 percent of Formula 1 stock and Ecclestone’s Bambino Trust 8.5 percent, with the largest stakeholders being private equity firm CVC Capital Partners (35.5 percent stake) and U.S. fund manager Waddell & Reed (20.9 percent). Only return the topic.
Ownership stakes in Formula 1