Marvel Comics is one of two major American comic company.
The earliest Marvel stories to feature Mandrake the Magician was the 1987 Defenders of the Earth series, based upon the TV series with the same name. The series was released under Marvel's Star Comics imprint, and lasted four issues.
Starting in 1994 Marvel Comics released four limited series not set in Marvel continuity. These miniseries featured four famous comics originally from King Features Syndicate: "Prince Valiant", "The Phantom", "Mandrake the Magician" and "Flash Gordon".
Strangly, the third (and last) issue of the Mandrake series was never released.