Key Takeaways SNY stock fell nearly 2% after two setbacks tied to Sanofi's investigational MS drug tolebrutinib.The FDA pushed its decision on tolebrutinib for nrSPMS to the first quarter of 2026 after new submissions.SNY said tolebrutinib failed the primary endpoint in a phase III PPMS study, ending development in that use.Shares of Sanofi (SNY) fell nearly 2% on Monday after the company reported two setbacks in connection with its investigational multiple sclerosis (MS) drug, tolebrutinib.FDA Delays Decis ...