Sources: UFC undergoes layoffs at Vegas headquarters, internationally

The UFC underwent significant layoffs on Tuesday, according to multiple sources with knowledge of the situation.

The moves come less than four months after the UFC announced a $4 billion sale to California-based talent agency WME-IMG. According to sources, layoffs took place at the UFC's headquarters in Las Vegas, as well as internationally.

One of those affected was chief global brand officer Garry Cook, who joined the UFC in 2012. Cook released a statement to ESPN on Tuesday.

"This has been a magnificent experience with one of the greatest sports enterprises of the modern day," the statement read. "I am thankful and proud to have played a part in their brand story working with [former CEO] Lorenzo Fertitta, [president] Dana White, [COO] Lawrence Epstein and all the talented individuals at the UFC.

"With the new leadership from WME-IMG, the next era of continuing to redefine the global sports landscape is very exciting. I wish them well delivering on their vision for success."

According to a report from MMAJunkie.com, the UFC was set to lay off "under 15 percent" of its total staff, which is approximately 400 employees.

White, who received an owner's share in the sale, has stayed on as president with a five-year deal. Longtime matchmaker Joe Silva announced he would leave the company at the end of 2016. Director of communications Dave Sholler also announced recently he would depart next month for a position with the Philadelphia 76ers.