Why Africans with $1 billion in shares are missing from the Bloomberg and Forbes rich lists

A businessman crosses a billion dollars on paper. The stake is listed, the price is public, the arithmetic is simple. Then the rich lists come out and his name is not on them.

This happens regularly in African business, and it is not an oversight. Forbes and the Bloomberg Billionaires Index both apply rules that a headline share valuation ignores, and the gap between the two numbers is where most disputed African fortunes sit.

The first rule is the oldest one in accounting. Net worth is what you own minus what you owe.

A shareholding worth $1.2 billion, pledged against $900 million of borrowing, is worth $300 million to the person holding it. A shareholding worth $1.2 billion, pledged against $1.9 billion of borrowing, leaves the holder $700 million underwater. The shares are collateral rather than wealth, and if the price falls the lender takes them.

Wealth trackers subtract documented liabilities as a matter of routine, and they pay particular attention to debt secured against the shares themselves, because that is the mechanism through which most large African stakes were acquired in the first place. Empowerment transactions, management buyouts and control blocks across the continent have typically been funded by banks and development finance institutions rather than by cash, with the shares handed over as collateral.

South African mining supplied the clearest demonstration of what that means.

Lazarus Zim was listed among South Africa's wealthiest businessmen in 2010 with a net worth of about 1.4 billion rand, built on the empowerment stake his investment house Afripalm Resources held in the platinum producer Northam. The position had been assembled with debt secured against the shares themselves. When the global financial crisis hit commodity prices, Northam's share price fell far enough that the pledged holding failed the covenant tests written into the financing, and under the terms of its guarantee with Nedbank, Afripalm was forced to relinquish the shares. They were bought by the Public Investment Corporation. Northam's empowerment credentials collapsed from 26% to under 10%, and Afripalm Resources was shut down, with staff at its Sandton offices told to expect retrenchment notices.

Nothing about the shareholding had been fictional. The shares existed and the market priced them. What the market price never showed was who would own them when the covenants broke.

Documented debt is the cleanest disqualifier because it can be checked. Court filings, published loan agreements, exchange announcements of pledged shares and the accounts of the lending institution all put liabilities on the record, and both organisations use them.

The second rule concerns what a stake can actually be sold for.

A rich list price is a mark-to-market calculation, multiplying shares by the closing quote. It assumes the holder could realise that price, which is often untrue for a large position on a thin exchange. Selling 20% of a company into a market that trades a fraction of a percent of its shares each day would collapse the price long before the sale completed. Both trackers apply liquidity discounts for that reason, and they discount harder where exchange controls, capital restrictions or currency convertibility limit what a holder could take out of the country.

African currencies compound the problem. A fortune denominated in naira, kwacha or Zimbabwe gold is worth whatever the dollar rate says on the measurement date, and devaluations have wiped tens of percentage points off African fortunes without a single share changing hands.

The third rule is about who really owns the asset.

Both organisations rank individuals, not registers. Where a holding is beneficially owned by somebody other than the named shareholder, or where ownership sits inside a trust with multiple beneficiaries, the tracker attributes only what the individual actually controls. Family trusts, nominee structures and vehicles with several shareholders are routinely broken down rather than credited whole.

Verification is the practical constraint. Forbes has said repeatedly that it excludes people whose assets it cannot document, and it has declined to rank figures whose business holdings could not be separated from public office or state connection. Bloomberg publishes its methodology and will not carry a valuation it cannot support. Neither is obliged to explain an omission, and neither typically does.

The fourth rule is the one that generates the most friction, and it concerns what people say their own assets are worth.

Businessmen submitting claims to wealth trackers routinely value privately held property, land and unlisted companies at figures no independent valuer has produced. A hotel is worth what its owner says it cost to build. A land bank is priced at the highest sale ever recorded in the district. A private manufacturing group is valued on a multiple borrowed from a listed competitor with better margins, deeper disclosure and a liquid share. None of it is fraudulent. All of it is unverifiable, and unverifiable is the same as excluded when the standard is documentation.

Real estate is where the gap tends to be widest. Commercial property in African cities is often held without a recent independent valuation, in markets where comparable transactions are scarce and where the currency the valuation is denominated in has moved substantially since the last one. An owner citing a figure from four years ago in a market with 30% annual inflation is not lying, but the number describes a different economy from the one the tracker is measuring.

Private companies fall into the same gap for less contentious reasons. A group that publishes no accounts cannot be valued from the outside, so trackers either estimate conservatively, using construction cost, book value or comparable multiples, or leave it out entirely. Several of the largest privately held African businesses appear nowhere on any rich list, not because anyone doubts they are substantial but because nobody outside them can prove how substantial.

What follows from all this is that a rich list is a claim about verified, unencumbered, realisable wealth, not a scoreboard of asset prices.

That distinction matters more in African markets than almost anywhere else, because the debt is heavier, the exchanges are thinner, the currencies move faster and the disclosure is weaker. A businessman can be genuinely wealthy, genuinely control a billion dollars of listed equity, and still fail every test a wealth tracker applies.

The gap between the two positions is not a scandal. It is a measurement problem, and it is one the continent's disclosure regime has not solved.