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    • Kiev, Ukraine

      • Koum was born and raised in a village outside of Kiev, Ukraine, the only child of a housewife and a construction manager. He immigrated to California with his mother at age 16, enrolling at San Jose State University and working at Ernst & Young as a security tester.
      www.bloomberg.com/billionaires/profiles/jan-koum/

      Bloomberg Billionaires Index - Jan Koum

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  3. www.forbes.com › profile › jan-koumJan Koum - Forbes

    3 days ago · Jan Koum cofounded WhatsApp, now the world's biggest mobile messaging service, in 2009. Facebook bought the startup for $22 billion in cash and stock in 2014. He resigned as CEO of WhatsApp in ...

    • CEO, Cofounder

  4. www.bloomberg.com › billionaires › profilesBloomberg Billionaires Index - Jan Koum

    4 days ago · Koum was born and raised in a village outside of Kiev, Ukraine, the only child of a housewife and a construction manager. He immigrated to California with his mother at age 16, enrolling...

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  6. www.britannica.com › topic › WhatsAppWhatsApp | History & Facts | Britannica

    4 days ago · WhatsApp was founded in 2009 by Brian Acton and Jan Koum. Koum, a Ukrainian immigrant who had just begun attending classes at San Jose State University, and Acton, a Stanford-educated programmer, met while Acton was working for Internet pioneer Yahoo! in 1997.

  7. www.forbes.com › profile › brian-actonBrian Acton - Forbes

    5 days ago · Computer engineer Brian Acton cofounded messaging app WhatsApp with Jan Koum in 2007; the two had met while working at Yahoo. The pair sold WhatsApp to Facebook for $22 billion in cash and...

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  9. www.bloomberg.com › billionairesBloomberg Billionaires Index

    2 days ago · View profiles for each of the world’s 500 richest people, see the biggest movers, and compare fortunes or track returns. As of June 18, 2024. The Bloomberg Billionaires Index is a daily ranking...

  10. www.msn.com › en-us › money25 Tech Billionaires Who Dropped Out of College - MSN

    5 days ago · Jan Koum dropped out of San Jose State University to focus on his work at Yahoo and later co-founded WhatsApp in 2009.