Berkshire Hathaway has spent the better part of a year quietly building one of its largest conviction bets of 2026, and the latest SEC filings show the position has now reached 11.2% of homebuilder Lennar, worth roughly $2.1 billion. The pace of buying has cooled from its September peak, but the trajectory tells a story the market has been slow to price in: Buffett and his team are betting the housing downturn is closer to a bottom than to further deterioration.
The numbers trace a methodical build, not a single leap of faith. Berkshire held 7.2 million Lennar shares at the end of last year, growing to 10.3 million by the end of the first quarter (+43%) and 13.4 million by the end of the second (+30%). The position has since roughly doubled again to 26.6 million shares. Buying accelerated sharply between September 17 and 25, averaging $58 million a day across six trading sessions -- enough to push the stake past the 10% threshold that triggers mandatory SEC disclosure within two business days. This week's pace has slowed to about $18 million a day, with no filing at all on Thursday, suggesting Berkshire paused rather than retreated.
The contrast with Wall Street's read is striking. Morgan Stanley initiated coverage this week with an "underweight" rating and a $65 price target, implying nearly 19% downside from Friday's $79.81 close. The bear case leans on real-time pain: the average 30-year fixed mortgage rate has climbed to 7.30%, the highest since late 2023, after six consecutive weekly increases that have pushed affordability further out of reach for buyers. Berkshire's buying suggests a different time horizon -- a bet that today's rate-driven freeze eventually gives way to a multi-year unlock of demand built up by years of chronic underbuilding in U.S. housing stock.
So what for long-term investors: the real takeaway isn't the stock itself, but the cadence of the conviction. Berkshire sized each addition to the evidence in front of it across four straight quarters rather than betting everything on one call, a reminder that durable theses are built position by position, not timed to a headline. While trading desks react to this week's mortgage print, capital allocators with a multi-year lens are pricing in a supply shortage that doesn't resolve on anyone's quarterly calendar -- which is exactly the kind of patience the market tends to under-reward in the moment and over-reward eventually.