Million To Billion
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The founder and currently the Chairman of Globacom, the second-largest mobile network in Nigeria with over 45 million subscribers, Mike Adenuga first created a splash when he got his drilling license in 1990, forming the Conoil Producing Company and striking oil in the waters of Ondo State. He has also ventured in the real estate business with Cobblestone Properties and Estates, and in 2018 alone, made $3.9 billion.