Filings: Jan Koum's remaining Facebook stock options were not due to fully vest until November, and he may be forfeiting up to $1B if he leaves before May 15 (Bloomberg)

Bloomberg:
Filings: Jan Koum's remaining Facebook stock options were not due to fully vest until November, and he may be forfeiting up to $1B if he leaves before May 15  —  WhatsApp co-founder still has amassed a $10.4 billion fortune  —  He's said to have clashed with other executives over strategy

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