Ukraine-Born Jan Koum’s $19B WhatsApp Sale 10% of Homeland’s GDP
(JTA) — Jan Koum’s birthday was Monday, but he received his big gift early. The Ukraine-born CEO and founder of WhatsApp has catapulted from relative unknown to a poster boy for rags-to-riches immigrant triumph since his rapidly growing messaging company was sold last week to Facebook for a record-breaking $19 billion. Koum, who just turned…