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Photo: Tech.eu Photostream / Wikimedia Commons (CC BY 2.0) (CC BY 2.0 — verified at https://commons.wikimedia.org/wiki/File:Jan_Koum_-_Whatsapp_-_4_Years_from_Now_(12791847664).jpg on 2026-10-14) · via The Daily Letter

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Jan Koum: Ukrainian-born American entrepreneur, co-founder of WhatsApp. Estimated personal net worth: $16.1 billion (Forbes, as of 2024). This is a published estimate of personal wealth, not the value of a company.

Source: The Daily Letter

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