There is no press release, because there is no conference call scheduled. When MNKD releases other SEC required filings they do not issue a press release until the filings are made public. The purpose of the advance notice is so that investors can plan to listen to or participate in the conference call.

While some may consider Friday after the close timing as a way to bury the news, it is also a way to allow everyone time to digest the news without giving some an unfair advantage and without needing to halt trading. For this reason my guess is that the trial data will also be released next Friday after the close.