H.C. Wainwright reiterated a Sell rating on Sarepta Therapeutics Inc. (SRPT:NASDAQ), arguing that promising but early-stage siRNA muscle concentration data in DM1 and FSHD cannot compensate for falling ELEVIDYS sales, a fatal adverse event in SRP-1003, and intensifying competition from Avidity and Dyne ahead of a potential 2030 market entry.