The history of Merr-Sonn Technologies is the composition of the rich histories of the three groups the conglomerate is made up from.

Merr-Sonn started out as an independent faction, before it became a member of the Confederacy of Independent Systems. It was soon sold off to SoroSuub Corporation, at that point the largest business organization in the Galaxy. There, it thrived under the leadership of Alec Trevelyan. When SoroSuub and the Rebel Alliance joined forces and founded the democratic New Republic, Merr-Sonn came under the ownership of the Republic. During that time, it was most notably led by the Wookiee weapons veteran Zeth Quo and the Hapan Amara Myzair.

SoroSuub Munitions evolved from Riviera Trident and operated as the main armaments supplier for the SoroSuub conglomerate. Its first leader was Van Harrad, who shaped the faction into its final form. After the foundation of the New Republic, Van Harradís skills were needed elsewhere in the government and Jim Blitz took over. He was replaced by Rilarr Denaiss when the rowdy Corellian decided to travel the depths of the Galaxy. The last leader of SoroSuub Munitions was the Kaminoan Izjna Khaldho.

NeuroSaav Technology was founded as the supplier of the Rebel Alliance weaponry at the start of the Civil War. The group was led by many strong leaders who were also notable members of the Alliance. The production company was well-known for its top-notch weaponry, which often proved to be a valuable asset on battlegrounds across the Galaxy. The DH-17 rifle proved to be the ideal sidearm for firefights in enclosed space such as ships, whereas the DL-44 was a much desired weapon for smugglers and mercenaries. When the Rebel Alliance evolved into the New Republic, NeuroSaav continued to supply the Republic with its high-quality products. The groupís last leader was Aeternal Conclave.

On Year 10, these three groups merged into the largest armaments conglomerate in the known Galaxy.
Later on, at Day 110 of Year 13, TransGalMeg Industries also merged into Merr-Sonn Technologies.