PAT DORSEY
Former Morningstar director of equity research who literally wrote the book on economic moats and now manages a moat-focused fund
Pat Dorsey spent 12 years at Morningstar building the company's equity research methodology — including the concept of "wide moat" investing that became one of the most influential frameworks in modern stock analysis. Then he left to start Dorsey Asset Management and actually invest using the framework he created. His fund buys companies with durable competitive advantages (moats) and holds them for years. He is the rare person who wrote the textbook and then proved it works with real money. His two books — "The Five Rules for Successful Stock Investing" and "The Little Book That Builds Wealth" — are considered essential reading for anyone who wants to understand competitive advantages in investing.
Net Worth
$200 million
Nationality
American
Time Horizon
Long-Term
Risk Appetite
5 / 10
CAREER & BACKGROUND
Joined Morningstar in 2000 and became director of equity research. Built and led a team of 100+ equity analysts.
Developed Morningstar's economic moat rating methodology — now used by millions of investors worldwide. The moat framework categorizes companies by the durability of their competitive advantages: wide moat, narrow moat, or no moat.
Left Morningstar in 2012 to found Dorsey Asset Management. Runs a concentrated portfolio of 15-25 stocks with wide economic moats.
Author of "The Five Rules for Successful Stock Investing" (2004) and "The Little Book That Builds Wealth" (2008) — both considered classics in the investment education space.
COMPANIES & ROLES
Dorsey Asset Management (founder/CIO), formerly Morningstar (Director of Equity Research)
INVESTING STYLE & PHILOSOPHY
Dorsey is a pure moat investor. He identifies companies with durable competitive advantages — network effects, switching costs, intangible assets, cost advantages — and buys them at reasonable prices.
He holds concentrated portfolios (15-25 stocks) for multi-year periods. He avoids companies without identifiable moats regardless of how cheap they appear.
His approach combines Buffett-style qualitative analysis with the systematic moat framework he built at Morningstar.
THE PLAYBOOK
Risk Approach
Moderate. Dorsey runs concentrated portfolios which carry stock-specific risk.
But his focus on wide-moat companies (businesses with strong competitive advantages) provides a natural safety net — these companies tend to be resilient during downturns. He is not chasing speculative stories.
His risk is in concentration, not in quality.
Money Habits
Based in Chicago. Known for clear, jargon-free communication about investing.
His books and talks are popular precisely because they make complex concepts accessible. He runs Dorsey Asset Management as a boutique operation focused on a small number of clients.
BIGGEST WIN
Building the Morningstar moat framework. The wide moat methodology has influenced how millions of investors analyze stocks.
Morningstar's Wide Moat Focus Index has outperformed the S&P 500 over long periods. Dorsey essentially created the intellectual framework and then proved it works with his own capital at Dorsey Asset Management.
BIGGEST MISTAKE
Moat investing has periods of underperformance, particularly when momentum and speculative stocks are leading the market. During the meme stock era (2020-2021), boring moat stocks underperformed flashy growth names.
Dorsey's approach requires patience during these periods.
FINANCIAL PHILOSOPHY
Dorsey believes competitive advantages are the single most important factor in long-term stock performance. A cheap stock without a moat is a trap.
An expensive stock with a wide moat is often a better buy. He focuses on the durability of competitive advantages — not just whether a company has one today, but whether it will still have one in 10 years.
He believes most investors overweight valuation and underweight quality.
FAMILY & PERSONAL LIFE
Private about personal life. Based in the Chicago area.
EDUCATION
MBA from Northwestern University (Kellogg). Undergraduate in Political Science.
Joined Morningstar early in his career and was shaped by the research culture there.
BOOKS & RESOURCES
Competitive Strategy by Michael Porter
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QUOTES (6)
I built the moat framework at Morningstar. Then I left to invest with it. Building the theory was easy. Living it is harder.
I wrote two books on investing. The best compliment I ever received was from a reader who said they actually made money from them.
A moat is not just an advantage. It is a durable advantage. Most advantages disappear in five years. Moats last decades.
A cheap stock without a moat is a value trap. An expensive stock with a wide moat is often the better buy.
There are four sources of moats: network effects, switching costs, intangible assets, and cost advantages. That is the entire framework.
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