Sergey Brin, the Google co-founder and world’s sixth-richest person, filed for a divorce from his wife of three years, making him the third mega-billionaire to do so in as many years. Brin filed a petition for dissolution of his marriage to Nicole Shanahan this month, citing “irreconcilable differences,” according to court documents. The couple, who have a three-year-old son, took steps to keep the details of the split private, requesting that documents be sealed by the court.

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