"In addition, Sarepta has granted the underwriters a 30-day...

"In addition, Sarepta has granted the underwriters a 30-day option to purchase up to an additional 925,926 shares of its common stock on the same terms and conditions as the initial shares sold to the underwriters. Sarepta anticipates the gross proceeds from the offering, before deducting underwriting discounts and commissions and other offering expenses, to be approximately $500.0 million, excluding any exercise of the underwriters’ option to purchase additional shares."

My first thoughts of the $500m offer were - who'd want to do that? However, if you can get an extra sixth of your initial purchase, at a later date, when .... things are looking (erhm ANP) a lot better, it's not a bad deal.