Interactive Insight
Where Public Company Wealth Sits.
The Structural Asymmetry.
Across roughly 24,000 US public companies and $91 trillion of total shareholder wealth, the top 0.7% generated 75% of the wealth. A Sankey of the concentration.
Mauboussin and Callahan (2026) document an asymmetry that should reshape how boards price governance attention. A tiny minority of companies generate the overwhelming majority of long-run shareholder wealth. The implication is direct: in a world where most public companies generate negative cumulative aggregate value-added relative to the risk-free rate, governance attention should not be distributed by AUM or market cap. It should be distributed by the marginal effect a board can have on the firm’s path through the structural distribution.
From the SGaaS White Paper
Why governance attention must be reallocated
The white paper uses the concentration evidence to reframe board attention away from procedural volume toward strategic correctness — the variable that determines whether the firm contributes to the 75% or the 0%.
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