OpenAI is preparing for one of history's largest IPOs with an unusual twist: it will be controlled by its charitable foundation, which owns just 26% but has special governance rights. After last year's contentious restructuring, the company converted to a public benefit corporation under the OpenAI Foundation, creating one of America's wealthiest non-profits larger than the Gates Foundation's endowment.

The risk of political interference looms large. Hershey's chocolate company offers a cautionary tale when its charitable trust tried to sell in 2002, triggering outrage in the town. The Pennsylvania attorney-general sued, blocking the deal and causing $23bn in shareholder value to evaporate as political logic overrode business considerations.

California's attorney-general Rob Bonta has already signaled close monitoring of OpenAI after its 2023 board crisis. While the company hopes to emulate successful enterprise foundations like Novo Nordisk, it faces different governance tensions. Investors entering this uncharted territory must balance long-term potential against unpredictable regulatory oversight.