Strongest Businesses by Quality Score (2026)

A stock can be cheap. It can have momentum. But if the underlying business is deteriorating, none of that matters. The Quality ranking isolates the question that should come first: is this a good business?

Two frameworks answer it. The Piotroski F-Score runs nine binary tests on the most recent financials — profitability, leverage, operating efficiency. Is net income positive? Is cash flow real (exceeding net income)? Is the debt burden shrinking? Each passed test earns a point out of 9. Academic research has shown that companies scoring 7-9 on the F-Score significantly outperform the broad market, while those scoring 0-3 tend to underperform even in bull markets.

The Buffett Quality Assessment asks a different kind of question: does this company have a moat? Consistent ROE above 15%, predictable earnings trajectory, low capital expenditure needs, manageable leverage, and stable or expanding margins — these are the hallmarks of a franchise business. A "Strong" Buffett rating means the company exhibits characteristics of a durable competitive advantage. "Reject" is a red flag.

How these two models are blended depends on the sector. Capital-intensive industries (Industrials, Energy) lean harder on Piotroski because financial discipline matters most when assets are expensive to maintain. Consumer-facing businesses give more weight to Buffett's moat criteria, where brand loyalty and pricing power determine long-term survival.

The companies at the top of this list generate consistent cash, carry manageable debt, and show improving trends. They are not necessarily the cheapest or the fastest-rising — they are the ones you would want to own through a recession.