- Google/Alphabet's current CEO is a materials engineer [0]
- Apple's current CEO is an MBA with a degree in industrial engineering [1]. Jobs, the founding CEO, was also not a software engineer.
- Amazon's CEO, Bezos, was a software engineer [2], but it's widely known that he didn't do programming work for Amazon. I don't think he would consider himself a "software engineer" today. There is a HN regular who was an early Amazon employee and has talked about this (his name now escapes me).
That makes 7/10 of the "top 10" companies in this chart headed by non-software-engineer CEOs!!!
[0]: https://en.wikipedia.org/wiki/Sundar_Pichai