Vaughn, who also was charged criminally, pleaded guilty in September 2016 and was sentenced to 12 years in prison.
The SEC's litigation against Robertson, Vaughn and Cavalier Union, which was stayed pending the completion of Robertson's criminal trial, is ongoing.
In the SEC case, the court previously entered final judgments against Robertson and Vaughn, ordering them to pay more than $8 million in disgorgement and permanently enjoining them from violating the registration and antifraud provisions of the Securities and Exchange Act.
The case was prosecuted by the U.S. Attorney's Office for the Eastern District of Virginia with the Federal Bureau of Investigation.