Executor-class Star Dreadnoughts were some of the largest and most powerful Imperial starships ever created. Along with other classes of massive Imperial capital ships,they were also informally referred to as Super Star Destroyers. The most distinguished Super Star Destroyer was the Executor, flagship of the Dark Lord of the Sith Darth Vader.

According to the Rebel Alliance's intelligence agency, more than a dozen ships of the class were made, including the Executor itself, the Annihilator, the Arbitrator, and the Ravager. However, the true number remained a subject of debate, as Alliance analysts endeavored to make sense of Imperial propaganda and see through the black budgets designed to hide the scope of the Emperor Palpatine's secret weapons programs.