The Exchange was a criminal organization active around 4,000 BBY, and possibly the most powerful of its time, that dealt in spice smuggling, extortion, weapon trafficking, slave trading, and bounty hunting. The organization was active on many planets and employed notorious bounty hunters such as Calo Nord. During the First Jedi Purge, they posted a huge bounty on live Jedi, large enough to purchase an entire planet. 300 years later, during the Cold War, the Exchange was engaged in a galaxy spanning crime war with the Hutt Cartel centring on Nar Shaddaa.
The Exchange maintained organized cells on various worlds of interest; each of those planetary cells was led by a single boss who ruled over Exchange interests on that world. Some Exchange bosses were Davik Kang, the crime lord of the planet Taris, Loppak Slusk of Telos IV, and Goto of Nar Shaddaa. The bosses reported to sector chiefs, who had no cells of their own and operated under secret identities, leading normal lives. Even the bosses did not know who the chiefs were in real life, since most communications were done over secret, secure communications channels. The chiefs in turn reported to the head of the Exchange, who was himself one of the sector chiefs. It was often locally represented by sham fronts, such as Citadel Station's Bumani Exchange Corporation.
The Exchange was an extremely powerful criminal organization that operated throughout much of the Outer Rim Territories. The shadowy group was led by an even more mysterious entity called the Compeer, with a command structure that included individual crime lords controlling profitable worlds. The only way to be accepted into this elite group was to be nominated by several other crime lords.
The Exchange was briefly yet significantly involved with, and damaged by, two important figures around the time of the Jedi Civil War: Revan and the Jedi Exile, Meetra Surik. In 3,956 BBY, Revan infiltrated the Exchange headquarters on Taris and killed its local leader, Davik Kang. Five years later, Surik arrived on Nar Shaddaa, Nal Hutta's largest moon. She proceeded to destabilize the Exchange's operations on the moon by killing the crime lords Saquesh and Visquis, and thereafter by destroying the Visionary. G0-T0 went along with the Exile in hopes of stabilizing the galaxy. He was eventually destroyed on Malachor V when the Mass Shadow Generator was re-activated and blew up the planet along with G0-T0.
The Exchange boss of Nar Shaddaa was known by the name of Goto. Never seen in person and appearing via hologram, Goto was not an organic being but actually a droid, G0-T0. Using a hologram that gave the impression it was a living being, G0-T0 remotely led and operated the Exchange. Eventually, he traveled with Meetra Surik.
G0-T0 managed to use the illegal actions of the Exchange for his ultimate purpose of stabilizing the Galactic Republic. Its smuggling ring caused the deaths of destabilizing persons or organizations, developed unofficial profits for entire sectors, and strengthened Republic worlds that would otherwise be poor and ignored. Believing that the major source of the Republic's problems revolved around the Jedi Civil War, it also enacted bounties for live Jedi and Sith. Many bounty hunters simply killed Jedi and Sith instead of capturing them, but the outcome remained: less Jedi or Sith to fight against each other meant less fighting period. G0-T0, as part of his programming, was simply interested in keeping the Republic in order and keeping its infrastructure intact due to the devastation caused by the Jedi Civil War.
The Exchange continued to operate in the following years and was still in existence by 3,653 BBY during the Cold War between the Galactic Republic and reborn Sith Empire. In this era, one of their crime lords helped sponsor Jewl'a Nightbringer into the Great Hunt. One gangster from the Exchange was also seen in the company of Kaliyo Djannis. By this point, many operations run by the Exchange were going bad or turning out to be ambushes because it did not work on good terms with the other syndicates which included the Hutts. This led to one of their agents, Zeerid Korr, almost being ambushed by an unknown group which saw him suspecting that there was a leak within the organization.
According to Kreia's predictions before her death on Malachor V, the Exchange grew in power, until the Hutts ceased tolerating the Exchange, causing it to slowly feed upon itself.