In a social-media post on X, Ackman said the current tariff environment helps Hertz, which he described as part of an oligopoly where Enterprise, Avis and Hertz control nearly 95%

Key Takeaways Hertz shares soared 56% Wednesday after billionaire Bill Ackman’s investment firm disclosed a sizable stake in the struggling rental car company.Ackman's Pershing Square held over 12.7 million shares in the company at the end of the fourth quarter,