A merchant guild to which the Zibalian trader Kivas Fajo belonged when he staged Data's apparent death in order to add the android to his private collection.
The Stacius Trade Guild is a commercial body operating near Federation space. Its only known member is Kivas Fajo, a wealthy dealer whose ship, the Jovis, carries a hoard of unique objects he has acquired by purchase or theft.
The guild is named in The Most Toys. Fajo presents himself as a trader of the guild when he supplies the Enterprise with hytritium, a rare and unstable compound needed to neutralise contamination of the water supply on Beta Agni II. He uses the transfer to fake a shuttle explosion and kidnap Data.
When the Enterprise crew realise that the emergency was engineered and that Fajo was the only source of the cure, they pursue the Jovis and recover Data, and Fajo is taken into custody.