they would have amended the protocol to allow more people to join the study if that was the case, which would have changed the completion date of the study. The smoking gun is that they have updated the study clinicaltrials.gov to completed in January. Even with a 1 month follow up period, they have had this data for multiple months now.
Pharma companies are crack heads for positive press releases, especially with how hot the market has been. I highly doubt they are sitting on great news. This drug would be NDA ready and would be a meaningful source of income for the company. My guess is at best they have gotten mediocre/confusing data from this study, and they are trying to figure out a way to spin it as a positive.