Adani Group Chairman Gautam Adani has become the world's fifth-richest person after he overtook veteran investor Warren Buffett, according to Forbes data. According to Forbes’ Real-Time Billionaires List, Adani's wealth stood at $122.2 billion, racing past Buffett's $120. billion. Adani's estimated $123.7 billion net worth makes him the richest person in India, $19 billion wealthier than the country's number 2, Mukesh Ambani (who's worth an estimated $104.7 billion), Forbes said in the report. Adani surpassed Buffett as shares of the famed investor's Berkshire Hathaway dropped by 2 per cent on Friday amid a broad drop in the US stock market.