Four U.S.-based drone companies will meet with the Trump administration on Thursday to discuss the future of the fast-growing industry amid changes in drone regulations and air traffic control.

AirMap, Airspace, Kespry, and PrecisionHawk will attend the meeting with the Trump administration, Recode reports.

Google's drone delivery company Project Wing, and DJI, the largest drone manufacturer in the world, which is based in China, will not be there, Recode reports.

The timing of the meeting with the White House is significant. Earlier this month, President Trump announced that he wants to privatize air traffic control. The FAA currently runs the countrywide system with a network of 28,000 employees who guide aircraft around the country's airspace.

The privatization of air traffic control could affect companies like Amazon, UPS, Google, and smaller drone startups that are exploring drone delivery. Currently, drone delivery is just an idea. A nationwide drone tracking system does not exist, and regulations that prohibit drones from leaving a pilot's line of sight hamstring delivery. But reports estimate that a private air traffic control system, created by private software companies that are already making flight tracking systems, could make drone delivery infrastructure a reality quicker than the FAA could do it.

NASA and the FAA are currently conducting research to create a drone traffic management system, which is supposed to come out in 2019. If the air traffic control system is privatized, the FAA would only have an oversight role, Recode reports.

In May, the Trump administration released a draft of a bill that would allow the federal government to track, seize, and destroy any drone aircraft over domestic soil perceived to be a threat.

Other changes in the industry include a federal court ruling that reversed the FAA's mandatory drone registration initiative. The FAA's rule, passed in 2015, forced all drone owners to register with the FAA, but the court ruled that it violated another law and struck it down.