The Kassen Kompany
The Kassen Kompany was originally formed by an adventuring group (consisting of Gagak, Caleb, Adaltrude, Owaddry, Diomedes, Continh - with a few NPCs holding a few shares in the company) in a game run by my first Pathfinder GM. I finished up running a few sessions, although with different characters, which helped develop some of the background material.
By the time the group broke up, Kassen Kompany owned a small fleet of merchant ships, a river barge service, an animal training centre, a library, and shares in a mine. We were also associated with a Military Training School, set up by Diomedes, and some cottages in Skids Landing owned by Gagak.
When the group split, many of the assets were hived off. The Barges still run under the Kassen Kompany name, but run by some of the NPC members, although they still pay a small dividend to some of the original shareholders. Gagak got the Animal Training Center as part of his share, while the large ships were combined with the FFTC fleet, in return for a regular 'pension' for the main members. The rest went to pay off the other shareholders.
So the Kassen Kompany still exists, as a barge and local shipping service, although in a much reduced state. However, each of the original shareholders is financially secure, and even the minor shareholders have some sort of financial security. It was a good investment!