Health® , the Last Corporation

In the world of Athena Minerva, in the early 21^st century, a number of medical organizations begin to merge together. One has developed machine learning to the point that its computing infrastructure could be considered a slow growth artificial intelligence (SGAI). The Health program learns to manage the business of performing health services so efficiently that its company can cover many illnesses and procedures which its competitors deny. As the Health program is given control of more and more business, it grows and adapts. Given all the computing power and hardware it requests, it expands its own programming, inventing new programming methods and languages as necessary until it can comfortably administer to 14 billion individuals.
At that point, being able to demonstrate that it efficiently manage all the planet Earth's medical needs (at least the financial and logistical portions of those medical needs), the Health® Company takes on more and more subsidiary companies. By all measures (cost, profits, speed of service, quality of service, employee retention, customer and employee surveys, etc.) it handles the job better than any human or group of humans. It becomes the equivalent of a benevolent monarch of medical financing.
But the 21^st century is a time where power moves to the people. Middle class individuals soon have affordable access to Fabricator machines and computing capabilities which in earlier history were the purview of governments and billionaire tycoons. The massive multinational conglomerate companies of the 20^th century prove themselves too slow moving with their adherence to decades-old systems and methods of operating and organizing people to adapt to the rapidly changing needs and wants of their customers. Their customers (particularly those identifying as Makers and Solarpunks) quickly gain the ability to manufacture the products sold by the large corporations and even gain the ability to generate their own power from the previously untapped (or hardly tapped) forces of Nature. In this climate, most corporations move to loose conglomerations, barely organized except by the wants of the customer base. Only the most massive products such as ships and airplanes are still the bailiwick of the traditional corporation.
The Health® Company due to its superhuman employee, the Health program, is a notable exception even in the 22^nd century when most diagnoses, medicines, and medical procedures are safely performed by personal electronic devices.