Tracy Britt Cool
Tracy Britt Cool
A Warren Buffett protégé at Berkshire Hathaway who, per a WSJ piece Kyle saved on June 18, 2026, left the company to start her own firm. She appears in Kyle’s notes as part of the Berkshire Hathaway orbit — listed among the company’s people alongside Buffett and Charlie Munger as the “protégé who left” — and is filed under the Investing: The Model thread, Kyle’s collection of links about Berkshire-style investing and the people it produced.
In Kyle’s reading of the Berkshire Hathaway Annual Letters, she is also the recurring case study for the Bifurcation of Investing thesis — the idea that as funds grow they are forced to move upmarket, leaving behind a long tail of smaller opportunities they will no longer compete for. Kyle’s note frames her departure from Berkshire as the concrete illustration: “Bigger funds move up market exposing a long tail of businesses that they’ll no longer compete for.” He returns to the point repeatedly across the annual-letters notes — “the curse of size and scale; Tracy Britt Cool,” “Tracy Britt Cool’s opportunity” — treating her exit as evidence that even Berkshire’s scale creates room for smaller acquirers in the small-and-medium-business tail.
Context: Tracy Britt Cool joined Berkshire Hathaway in 2009 as a financial assistant to Warren Buffett and went on to chair or run several Berkshire subsidiaries (including Pampered Chef, Larson-Juhl, Benjamin Moore, and Oriental Trading). In 2020 she left to co-found Kanbrick, an investment and operating partnership that takes long-term stakes in small and mid-sized companies, explicitly modeled on Berkshire’s permanent-capital, hands-on-operating approach — a move that maps directly onto the “long tail Berkshire can no longer chase” framing in Kyle’s notes.
Where this appears
- Berkshire Hathaway — listed in the company’s people roster as the Buffett protégé who left to start her own firm (WSJ link saved June 18, 2026).
- Berkshire Hathaway Annual Letters — the running case study for the Bifurcation of Investing framework; her departure from Berkshire is cited as evidence that scale forces large funds upmarket.
- Investing: The Model — filed under Kyle’s Berkshire-as-investing-model link collection.