Pat Dorsey
Dorsey Asset Management
Profile & Investment Philosophy
Pat Dorsey continues to run an ultra-concentrated portfolio of high-moat businesses. In Q1 2026, ASML Holding became his top position, followed by AerCap and Sunbelt Rentals. Dorsey's exit from Alphabet reflects a strict adherence to his "moat" framework, favoring businesses with structural advantages that are not yet fully priced for their long-term compounding potential.
Track Record
Pat Dorsey ran equity research at Morningstar for a decade, where he was the chief architect of the firm's economic-moat rating framework — arguably the most widely cited structural-quality methodology in retail investing. He left Morningstar in 2011 and founded Dorsey Asset Management in 2014, applying the moat framework as a concentrated long-only manager running ten to fifteen positions for institutional clients. The firm is small by hedge fund standards and intentionally so: capacity is the enemy of concentration. Dorsey publishes selectively, writes one of the better books on competitive advantage in print, and has built a reputation as one of the cleanest pure-play moat investors operating today. Benchmark: MSCI ACWI or S&P 500, depending on vehicle.
Signature Trades
Current Strategy (2026)
Dorsey's 2026 13F shows a major reshuffle: ASML leads at 14.8%, AerCap at 12.3%, United Rentals at 11.4% (new) and AppLovin at 10.0% (new). Four of the top ten are entirely new positions — an unusually high turnover for a moat investor who typically holds positions for years. The unifying theme is asset-heavy businesses with structural cost advantages: ASML owns lithography monopoly, AerCap is the global aircraft-leasing duopolist, United Rentals dominates equipment rental with route density, and AppLovin runs the mobile-ad tech stack. The shift suggests Dorsey is finding more moat opportunities in industrial-cyclical and infrastructure names than in classic consumer-staples territory. The book remains highly concentrated — top four positions over 48% — which is the Dorsey signature.
BMI Counter-Take
Dorsey is the manager we recommend to investors who want to learn how to think, not just what to buy. The current reshuffle is interesting precisely because it breaks his usual pattern: four new top-ten names in one filing window is uncharacteristic, and it suggests either a tactical view that current valuations in industrials and infrastructure offer better moat-adjusted entry points, or a genuine evolution in what he counts as a moat. Either way, the four-position 48% concentration tells you everything about his risk tolerance: he believes the analysis or he does not own the name. Worth following — and worth reading his book before copying any single position.
Current Portfolio
LATEST 13F 2026-03-31Latest SEC Form 13F filing. Total portfolio value: $1.26 B. Holdings: 11 positions.
| Security | Shares | Δ vs Prev | Value ($) | Portfolio % |
|---|---|---|---|---|
| Asml Hldg NV | 140,295 | -27.1% | $185 M | 14.8 % |
| Aercap Holdings NV | 1.12 M | -7.5% | $154 M | 12.3 % |
| Sunbelt Rentals Holdings Inc. | 2.20 M | ★ NEW | $144 M | 11.4 % |
| Applovin Corp. | 316,952 | ★ NEW | $126 M | 10.0 % |
| Danaher Corp. Del | 580,240 | -29.9% | $110 M | 8.76 % |
| Royalty Pharma PLC | 2.28 M | +0.8% | $109 M | 8.70 % |
| S&P Global Inc. | 222,683 | ★ NEW | $94.7 M | 7.54 % |
| Live Nation Entertainment In | 607,609 | +0.8% | $92.7 M | 7.38 % |
| Meta Platforms Inc. | 161,683 | +0.8% | $92.5 M | 7.37 % |
| Uber Technologies Inc. | 1.09 M | ★ NEW | $78.4 M | 6.24 % |
SOURCE: SEC Form 13F (2026-05-15). BMI Smart Money Tracker.