Etrade allows normal trading, while Ally investing will not allow traders to buy any stock with a bid below $0.01. So trading rules vary from company to company, and whatever rules the company that you are using has that is currently preventing you from buying SNDD, is just a matter of their internal policies. Their internal rules are not being dictated the content of the 10K as that is unknown, most likely it'sjust the fact that it is late.