"With the November 12 CFIUS deadline imminent and without an extension in hand, we have no choice but to file a petition in court to defend our rights and those of our more than 1,500 employees in the US," TikTok said in a written statement Tuesday.
Trump has cited concerns that the Chinese government could spy on TikTok users if the app remains under Chinese ownership. TikTok has denied it's a security threat but said it's still trying to work with the administration to resolve its concerns.
The legal challenge is "a protection to ensure these discussions can take place," the company said.
The Trump administration had earlier sought to ban the app from smartphone app stores and deprive it of vital technical services, but federal judges have so far blocked those actions.
TikTok is now looking to the U.S. Court of Appeals for the District of Columbia Circuit to review Trump's divestment order and the government's national-security review.
- Associated Press