I really don't see any reason for them to be late. However, maybe some already know what's in it and that is why the stock has traded like it has the last couple weeks.
An SEC form required for companies that will not be able to submit their 10-Q filing (for quarterly financial results) by the SEC deadline or in a timely manner. SEC Form NT 10-Q requires the registrant's information and the reason why the 10-Q is delayed. It also provides for application for relief from the deadline.
Investopedia Says
Investopedia explains SEC Form NT 10-Q
The form 10-Q is required to be filed within 45 days following the end of each of a company's first three fiscal quarters. If the 10-Q cannot be filed in a timely manner, the company must file a Form 10-QT with the commission. A very common reason for an NT 10-Q is a merger or acquisition, which prevents results from being incorporated in time for the filing. The SEC provides for "unreasonable effort and expense", with explanation, as part of the application for relief.