Not all billionaires are big on giving to charity. While some donate a lot, others hold back. This ranking looks at billionaires who give the least to charity, showing the gap between their wealth and their donations.

Howard Schultz – $320 million

You’ve likely heard of Starbucks, the coffee chain with the mermaid logo. It’s been led by Howard Schultz since the 1980s, who transformed it from a little-known company into a global powerhouse. Over four decades, Starbucks has earned Schultz $3.2 billion, and while he has made some charitable contributions—donating between 5% and 10% of his wealth—there’s room for him to give more considering his vast fortune.