Here are the companies the Yahoo Finance team is watching for you today.

Tilray is buying Canadian medical cannabis producer “Natura Naturals” for about $26 million in cash and stock. The deal is contingent on production milestones and includes a huge greenhouse for growing legal marijuana.

A departure from the C-suite at Express. The CEO, David Kornberg, is out as of today, though he’ll officially stay on the books into February. It’s not clear what led to his exit. Kornberg’s been in the top job at Express for the last 4 years. The COO is taking over, on an interim basis.

Tesla is denying reports it’s struck a deal over batteries in China. Tesla tells Bloomberg the reports are “completely false.” Reuters had said the electric car maker had reached a preliminary deal to buy batteries from a Chinese supplier, for its Shanghai factory. Tesla currently gets some of its batteries from Panasonic.

Panasonic is teaming up with Toyota to produce electric car batteries. The two companies announced today that the joint venture will launch by 2020. This comes as ecological vehicles become a more profitable sector amid concerns about global warming. Toyota will take a 51% stake in the partnership, Panasonic will own the rest.

United Airlines is reviewing an incident that left 250 passengers stuck on a plane for about 15 hours. The flight out of New Jersey was heading to Hong Kong last weekend when it was diverted to Newfoundland, Canada, after a medical emergency. A mix of factors, some of which included mechanical problems, led to the passengers being stuck on the frigid Canadian airfield.