After-hours buzz: Wynn Resorts, Spirit Airlines & more

Check out the companies making headlines after the bell Tuesday:

Wynn Resorts shares popped in extended trading after the leisure and gaming company announced preliminary financial statements for the first fiscal quarter. The company, which owns casinos in Macau and Las Vegas, said revenues were expected to be lower than this time last year in its Macau operations; Las Vegas sales are slated to come in at a similar range. 

Gambling in Macau has been under pressure as nearby China cracked down on the industry in recent years. Competitor MGM resorts' stock also dropped on the news. 

Spirit Airlines shares popped in extended trading, after losing more than 3 percent in regular trading. The company was rated at the bottom of a  list released Monday, the Associated Press reported Monday, when competitors Virgin America and Alaska Air also announced a merger. 

Shares of Cree tumbled after the LED lighting company said it anticipated a loss in the third quarter due to lower commercial orders. Cree shares were halted on the news and resumed trading down after hours as much as 13 percent. 

"I believe we've addressed the root causes that led to our recent business challenges," said Chuck Swoboda, Cree chairman and CEO, in a statement. "While it's premature to provide specific targets at this time, the order rate in commercial lighting improved in March, and we're optimistic that this, combined with demand for new products, will begin to drive growth in fiscal Q4."

Dolby Laboratories shares were lower in light trading. The cinema technology company assisted in the production of "Batman v Superman: Dawn of Justice," a film that has been panned by numerous critics in spite of initial box-office success. 

Shares of Twitter edged higher after the bell as Wall Street digested its latest partnerships. The social media company beat out competitors for the online streaming rights to 10  regular season NFL football games, reports said Tuesday, building on Monday's news that it might have inked a deal with Mastercard.

Business communications firms Mitel and Polycom's stocks rose after reports they might merge. The call center and videoconferencing firms were in "advanced merger talks," according to Bloomberg.

— CNBC's Steven Kopack and Alex Crippen contributed to this report.