Fifteen years ago, William Tewiah was building a fuel supply business focused largely on servicing mining firms in Ghana’s Western Region. Today, he sits atop the Ghana Stock Exchange as the owner of the largest individual equity stake ever recorded on the country’s public market.
The founder of ZEN Petroleum Holdings PLC has become Ghana’s richest stock market investor after the company’s successful listing on the Ghana Stock Exchange in April triggered a strong surge in its share price.
Based on the company’s latest market valuation, Tewiah’s 80% holding in ZEN Petroleum is now worth around GHS 3.87 billion, equivalent to roughly $338 million at prevailing exchange rates.
That valuation places him comfortably ahead of the country’s long-established stock market heavyweights and marks a defining moment for Ghana’s capital market, where large founder-led listings have remained relatively rare.
ZEN Petroleum listed on the Ghana Stock Exchange at GHS 5 per share in April 2026 after offering 128 million shares to investors in a deal that quickly drew strong institutional demand.
