Gainers:

Tilray Inc (NASDAQ:TLRY) shares are up 5 percent. In the regular trading session, shares gained 29 percent after receiving U.S. approval to import a medical cannabis study drug for a clinical trial at UC San Diego.

Unity Biotechnology Inc (NASDAQ:UBX) shares are up 5 percent. No news was immediately available.

FTE Networks Inc (NYSE:FTNW) shares are up 4 percent. No news was immediately available.

Level Brands Inc (NYSE:LEVB) shares are up 3 percent. No news was immediately available.

Atlassian Corporation PLC (NASDAQ:TEAM) shares are up 2 percent. No news was immediately available.

Losers:

Leap Therapeutics Inc (NASDAQ:LPTX) shares are down 7 percent. No news was immediately available. 

CarMax, Inc (NYSE:KMX) shares are down 4 percent. No news was immediately available.