Angel book concentrated where compute meets the physical world: AI infra, physical AI, aerospace and dual-use, and vertical software with real retention. A partial list — selected companies public or with permission to disclose.
The picks, shovels, and power plants of the model economy — companies building the compute layer everyone else depends on.
Systems that touch the world — and get harder to displace as they collect real-world data.
The atom-heavy end of the book — companies moving mass and hardware where it matters.
Software with real retention and signed enterprise revenue.