Check out the companies making headlines in midday trading. Biogen — The biotech’s stock tumbled more than 4% after the company warned it would need to take a $222 million pretax charge in the fourth quarter. The company said the charge, which includes research-and-development expenses and milestone payments, will lower its net income by about $1.26 per share. Trip.com — The company’s stock plunged 17% after Reuters reported that Chinese market regulators are investigating the travel website. Travel stocks — Shares of travel-related stocks showed broad weakness on Wednesday, including Airbnb , which fell more than 5%. In addition to a potential China crackdown, an industry group reported that 6% fewer foreign travelers visited the U.S. in 2025. The World Travel and Tourism Council said that trend occurred even as global tourism spending rose, according to Reuters. Booking was down 4%, while Expedia fell 5%. Rivian — Shares of the electric vehicle manufacturer slid more than 8% after UBS downgraded Rivian to sell from neutral. Analyst Joseph Spak noted that while the market has been enthusiastic over the company’s artificial intelligence potential, “most of the AI related news is ‘out.'” He also said that while his team likes the new Rivian R2 SUV, expectations may be too high. Intuitive Surgical — Shares fell nearly 4% as the company forecast its da Vinci surgical robots would perform fewe …
