Novo Nordisk unveiled its latest data for a weight-loss drug candidate, but shares of the maker of Wegovy and Ozempic tumbled as the results missed investors’ expectations and reignited concerns about Novo’s rivalry with Eli Lilly.

The Danish pharmaceutical said it was ending the partnership because Hims is selling and promoting a cheaper copycat of its blockbuster drug Wegovy.

Hims & Hers stock plunged around 30% on Monday after drugmaker Novo Nordisk abruptly ended a month-long collaboration to make its weight loss drug Wegovy available on the telehealth company's platform.