They didn't halt to announce the PP. So I doubt it would be to announce the closing (although that may be included) so... that leaves us with either the Results from the lab, or unusual business.

 

 My guess is Assays. And Hopefully Great assays!!

I like the way they do business. By halting, they leave no chance of an early morning run due to info spillage.

and they attract media attention.

 

Good luck all!