William Foley

San Francisco

About

William Foley

I build companies and analyze them. The two practices feed each other. The founder work teaches me what actually breaks inside a business, which sharpens the investment analysis. The investment work teaches me how markets price execution risk, which sharpens the operator decisions.

Most recently I built Flonance, an AI-native accounts payable platform, solo from zero. Before that, Rill Athletics, a client intelligence product for personal trainers that landed seven paying customers in Lisbon. I've closed $1M+ in personal deal volume across automotive and fitness B2C, averaging $1.5K front-end gross per deal and a 20% close rate on consultative sales.

My equity research practice has run for a decade. I started reading 10-Ks at nine. I've documented 5+ investment memos on positions that appreciated 50%+ within six months of entry, with a framework built around defined-risk structures, deterministic position economics, and disciplined exit criteria. The work draws on first-principles fundamental analysis paired with options-based expression of conviction.

The throughline across everything I've built is the same question: where does the work compound, and where does it just burn?