
A rejected idea about credit card fees became Stax, a payments company valued above $1 billion. Now Suneera Madhani is back with her brother at Worth, while opening the business classroom she once wished existed.

Ahmed Khattak is the founder and CEO of US Mobile, the only American carrier built natively on the public cloud that lets customers ride and switch between all three major networks (Verizon, AT&T, T-Mobile) on demand. A Pakistani immigrant who landed on an F1 student visa, he spent a decade clawing US Mobile to $100M in annual recurring revenue, then doubled it to $200M in nine months. Before that he co-founded GSM Nation, a $130M unlocked-phone marketplace that taught him how the carriers really make money.