With its proposed multi-class share structure, the SpaceX IPO signals a broader shift toward concentrating control of transformative technologies in the hands of a small group of insiders, often without meaningful oversight. This approach is not only problematic for investors, but can also undermine long-term company performance and damage the wider economy. Lessons from social media companies show how shielding founders from accountability can lead to unchecked decision-making, real-world harms, and persistent underperformance. As artificial intelligence emerges as a similarly consequential technology, the risks are even higher—placing immense influence in the hands of a few “founder kings” with limited accountability to investors or the public. The time to establish appropriate guardrails is now, while IPO structures and governance terms are still being defined and investor leverage remains strong.