As mothers of children with this disease, we have wept helplessly in recent months as friends — fellow members of a club we never asked to join — said goodbye to their sons, the babies they once held in their arms, whose dreams they held in their hearts until Duchenne robbed them of working muscles or a healthy future.

The restructuring enacted by Sarepta Therapeutics is expected to save up to $400 million in annual costs. Read why I'm downgrading SRPT stock from Hold to Sell.

Shares of Sarepta Therapeutics (NASDAQ: SRPT) plunged 26.85% in Friday pre-market after a clinical trial participant died following treatment with a gene therapy, marking the third death linked to the company's experimental treatments.

Sarepta Therapeutics announced it has laid off more than one-third of its workforce, a drastic cost-cutting move following the deaths of two teenagers administered its gene therapy for Duchenne muscular dystrophy.

Investing.com -- Sarepta Therapeutics (NASDAQ: SRPT) stock soared 36% in after-hours trading Wednesday after the biotech company announced a major strategic restructuring plan designed to ensure long-term financial sustainability while focusing on high-impact programs.

Sarepta Therapeutics, Inc. (NASDAQ:SRPT) is one of the 10 Best Small-Cap Stocks to Buy According to Billionaires. On July 10, JPMorgan lowered its price target for Sarepta Therapeutics, Inc. (NASDAQ:SRPT) from $30 to $28 but kept an “Overweight” rating.

The pharma company said it would lay off a third of its workforce and add a black-box warning to its controversial gene therapy Elevidys.