Tycoon William Tewiah's $338 million ZEN Petroleum stake makes him the richest stockholder on the Ghana Stock Exchange

William Tewiah has become the richest individual stockholder in the history of the Ghana Stock Exchange. His 80% stake in ZEN Petroleum Holdings PLC, the indigenous downstream energy group he founded in 2010 and listed on the exchange in April 2026, is currently worth GHS 3,865,600,000, approximately USD 338.1 million at the prevailing exchange rate of GHS 11.44 to the dollar. No single individual investor has ever sat on a disclosed listed equity position of that size on the Ghana bourse.

The valuation is based on ZEN Petroleum's current share price of GHS 7.55 on the Ghana Stock Exchange, where the stock trades under the ticker ZEN. Tewiah holds 512,000,000 shares in the company. The stock listed at GHS 5.00 per share in April and has since appreciated nearly 51%, a gain that has added hundreds of millions of cedis to the value of his position in a matter of weeks. At current prices, ZEN Petroleum is the 11th most valuable stock on the exchange, with a total market capitalisation of GHS 4.83 billion, representing approximately 1.82% of the GSE's total equity market.

The ascent puts Tewiah in a category of his own on the Ghana Stock Exchange, and it does so by a considerable margin.

A New Name at the Top

The title of Ghana's richest individual stock market investor had long belonged to Daniel Ofori, a Ghanaian business magnate and veteran capital markets investor who built his position over decades through disciplined accumulation of stakes in the country's leading banks and insurers. Ofori holds significant positions in GCB Bank, Societe Generale Ghana, SIC Insurance, and CalBank, and his portfolio made him the benchmark name in Ghanaian equity investment circles for years. As recently as early February 2026, Ofori led the GSE investor rankings with a combined portfolio valued at approximately $64.95 million. It was a position most observers expected him to hold for some time.

ZEN Petroleum's listing changed that calculation entirely. Tewiah's stake alone is now worth more than five times the value of Ofori's entire disclosed equity portfolio. The two men represent different archetypes of wealth creation on the Ghana Stock Exchange. Ofori built his position from the outside in, assembling stakes across multiple listed companies over many years. Tewiah built one company, took it public, and the market assigned it a valuation that made him the wealthiest stockholder on the exchange almost immediately.

The IPO That Turned Away Nearly GHS 330 Million

The market's appetite for ZEN Petroleum was evident long before the shares began trading. The IPO, which opened in late March 2026, offered 128 million shares at GHS 5.00 each, representing 20% of the company's enlarged capital and targeting proceeds of GHS 640 million. Before the public offer formally opened, the deal had already been covered through firm commitments from institutional investors. Bora Capital Advisors Pension Funds anchored 75.33% of the offer, alongside Temple Impact VC Fund and Stanbic Investment Management Services.

By the time the offer closed, total bids had exceeded GHS 970 million, oversubscribing the offer by 94% and forcing the company to turn away demand worth nearly GHS 330 million. Prior to the public offer, ZEN had also executed a private placement with institutional investors that raised close to GHS 1 billion, more than the company needed at the time.

ZEN Petroleum Holdings PLC officially listed 640 million ordinary shares on the Ghana Stock Exchange on April 22, 2026. The stock climbed nearly 10% on its second day of trading, lifting to GHS 5.55 and pushing the broader GSE Composite Index up 1.18% to 14,934.57 points, its sharpest single-session gain in recent weeks. The listing was the first by an indigenous private downstream petroleum company in the exchange's history, and it ended what had been a quiet stretch for new equity listings on the bourse.

A 100% Ghanaian Mandate

Tewiah and ZEN's board have been explicit about their intentions regarding ownership. ZEN's board chairman Frank Adu Jr. confirmed that the company has established arrangements with the Ghana Stock Exchange and the Central Securities Depository to ensure that no foreign investors can acquire shares in the listed company. "There is a way between the exchange and depository to ensure that we remain 100 percent Ghanaian," he said.

Tewiah has also indicated that he intends to reduce his personal holding over time, with plans to introduce an employee share ownership scheme and gradually float additional shares. His long-term stated intention is to bring his personal stake down to 50%. When that happens, it will represent one of the largest founder equity releases into Ghana's public market in the exchange's history, and it will carry significant implications for liquidity and price discovery in the ZEN counter.

The GHS 3.87 billion figure is a market valuation, not a cash position. But it reflects something real: 15 years of building a company from a single mining contract into the most valuable individual equity stake the Ghana Stock Exchange has ever seen. Tewiah drove his own tankers through Ghana's Western Region when nobody believed a Ghanaian company could serve the mines. The market has now put a number on what he built, and it is one that nobody on the exchange has come close to before.