When a company Warren Buffett built starts quietly buying a struggling stock, investors pay attention. That's exactly what has been happening with Lennar, one of America's largest homebuilders. Berkshire Hathaway has built almost a 10% stake in the Miami-based company, even as its shares have fallen more than 32% over the past year. Since then, the stake has only grown larger.

This article walks through what Berkshire has actually done, what's going on inside Lennar's business, why a value-minded investor might see an opportunity, and — just as important — the real risks that come with it.

Note: this article is for general educational purposes only and is not financial advice. It is not a recommendation to buy or sell any security. Stock prices and company details change quickly; always verify current information and consider speaking with a licensed financial advisor before investing.

👔 First, a Quick Note on Who Is Actually Making the Decisions

The headline says "Warren Buffett," but it's worth being precise. Buffett handed the CEO role to Greg Abel on January 1 of this year, and then stepped down as chairman on September 18, succeeded by his son Howard Buffett, while keeping a board seat and the title of chairman emeritus. So this is Berkshire Hathaway — the company Buffett built — acting under Abel's leadership. The move isn't a stretch for Abel, since Berkshire has a long history of taking stakes in homebuilders. Buffett's name still appears on the filings because he remains a reporting person for Berkshire's holdings.

📈 How Big Has the Bet Become?

The pace and scale of the buying are what make this story notable.

Date	What Was Reported
End of Q1 2026	About 10.3 million shares
End of Q2 2026	13.4 million shares, a 5.4% stake worth about $1.2 billion
Mid-September	Berkshire crossed the 10% ownership mark, which triggered an SEC rule requiring it to disclose further purchases within two business days
~September 22	Berkshire held 23.7 million Class A shares worth $1.8 billion
September 30	Berkshire and Buffett reported beneficial ownership of 26,034,436 Class A shares, or 12.5% of that share class
Early October	Further purchases lifted the Class A stake above 28.4 million shares, with recent buys priced around $80 a share

Berkshire increased its Lennar stake by 94% in the third quarter alone, and since the start of the year its holdings have jumped by roughly 260%, according to ResiClub's calculations. The chart above shows how sharply the position has grown just in the past few weeks.

One nuance: the pace may be cooling. Berkshire's most recent purchases were smaller — about $53.6 million of Class A shares in a three-day stretch — compared with almost $349 million bought across six of seven trading days earlier in September.

🧐 Why Would Berkshire Want Lennar?

Berkshire has never disclosed its detailed reasoning, so what follows is informed interpretation rather than confirmed fact. That said, several themes stand out.

1. It looks undervalued. CFRA Research analyst Catherine Seifert noted that Berkshire likes to buy undervalued assets, and Lennar certainly fits that description after its steep drop. Berkshire's investing style generally combines a long-term holding period with a preference for companies the market temporarily undervalues.

2. A patient, long-term view. Greg Abel has said he doesn't envision a quick recovery for homebuilders and expects housing-market softness to persist, but he also framed Berkshire's homebuilding investments as long-term bets rather than short-term trades. In other words, Berkshire isn't claiming to have found the bottom — it's willing to wait.

3. Signs of margin repair inside the business. Lennar has been using heavy sales incentives to keep homes moving, and those incentives have started to ease. Incentives sat around 14% of price in early 2026, versus a historical average between 4% and 6%, a gap management described as a significant margin-recovery opportunity if mortgage rates moderate.

Lennar 2026	Q1	Q2	Q3
Gross margin on home sales	15.2%	15.6%	15.8%
Sales incentives	14.1%	12.9%	12%

4. An operating model built for tough markets. Management says it has set cycle-time records, reduced standing inventory, and owns almost none of its land, an "asset-light" approach intended to limit risk when demand weakens. Cycle time hit a record low of 121 days in the second quarter, down from 132 days a year earlier.

5. Buybacks. Lennar repurchased 3 million shares for $256 million in the third quarter and ended the period with $1.2 billion in cash.

⚠️ The Honest Side: Why the Stock Has Been So Weak

It would be a mistake to read Berkshire's buying as a sign that everything is fine. Lennar's latest report was genuinely mixed.

Q3 2026 Metric	Result
Net earnings	$284 million, or $1.19 per share, versus $591 million, or $2.29 per share, a year earlier
New orders	Down 9% to 20,879 homes
Gross margin	15.8%, compared with 17.5% in the same quarter last year
Average sales price	Down 2.9% to $372,000
Versus Wall Street	Lennar missed estimates, with adjusted earnings nearly 5% below expectations

There are also forward-looking concerns. With mortgage rates unlikely to fall meaningfully soon and resale competition rising in some markets, Lennar may need to keep incentives elevated; because its land purchases follow predetermined schedules, it may have less flexibility to cut production. The broader backdrop matters too: the Federal Reserve raised interest rates in September for the first time in over three years, and long-term Treasury yields have climbed above 5%, which keeps mortgage rates stubbornly high and pressures housing affordability.

Lennar's own guidance for the fourth quarter reflects the uneven picture: it expects new orders of roughly 19,500 to 20,500 homes, deliveries of 22,000 to 23,000 homes, and a gross margin of 15.5% to 16.0%.

👤 A Real-World Example

To make this concrete, consider Dennis Hartley, a 52-year-old accountant from Charlotte, North Carolina, who builds his retirement portfolio mostly with index funds but likes to hold a few individual stocks.

When Dennis saw headlines about Berkshire's Lennar purchases, his first instinct was to buy shares right away. Instead, he did some homework. He read Lennar's latest earnings summary and noticed the falling orders and margins alongside the encouraging drop in incentives. He also realized that Berkshire's filings reveal purchases only after the fact, and that Berkshire can afford to wait years for a housing recovery in a way he can't necessarily count on for a retirement account.

Dennis ultimately decided to cap any Lennar position at about 2% of his portfolio and to build it gradually over several months rather than all at once. He also reminded himself that Berkshire's buying isn't a guarantee — it's one sophisticated investor's long-term view, not a promise the stock will rise. He summed it up this way: "I'm treating Buffett's move as a reason to look closer, not a reason to stop thinking for myself."

🔮 What to Watch Next

• Mortgage rates and the Fed: Further rate hikes or persistently high long-term yields would extend the pressure on affordability.
• Lennar's incentives and margins: Continued easing in incentives alongside steady or improving gross margins would support the bull case; a reversal would undercut it.
• New orders: Management guided to roughly 19,500–20,500 orders in Q4, so actual demand relative to that range will be telling.
• Berkshire's next filings: Whether it keeps buying — and at what pace — will signal how confident it remains.
• Lennar's next earnings report: The next set of results will show whether margin repair is genuinely taking hold.

📝 Summary

• Berkshire Hathaway, the company Warren Buffett built and now led by CEO Greg Abel, has aggressively built a stake in Lennar, reporting a 12.5% share of Lennar's Class A stock as of September 30, with further purchases continuing in early October.
• Berkshire's Lennar holdings have jumped roughly 260% since the start of 2026, and 94% in the third quarter alone, even as Lennar's stock fell more than 32% over the past year.
• Possible reasons include Lennar's depressed valuation, Berkshire's long-term investing style, early signs of margin repair as sales incentives ease (14.1% in Q1 to 12% in Q3), and Lennar's asset-light operating model.
• The risks are real: Lennar missed Wall Street estimates in Q3, new orders fell 9%, gross margin is below last year's level, and Abel himself says he doesn't expect a quick recovery in homebuilders.
• A high-interest-rate environment — including the Fed's September hike — continues to pressure housing affordability and may force Lennar to keep incentives elevated.
• Following a famous investor's purchases is not a substitute for your own research: Berkshire's filings reveal moves after the fact, and its time horizon and risk capacity differ from most individual investors'.

※References and Sources

• CNBC, "Lennar shares pop as Berkshire builds almost a 10% stake in beleaguered homebuilder," https://www.cnbc.com/2026/09/22/lennar-shares-pop-as-berkshire-builds-almost-a-10percent-stake-in-beleaguered-homebuilder.html
• CNBC, "Berkshire buys more Lennar shares, but pace of purchases slows," https://www.cnbc.com/2026/10/03/berkshire-buys-more-lennar-shares-but-pace-of-purchases-slows.html
• ResiClub Analytics, "Warren Buffett's successor makes third big housing market bet this year—now owning around 11% of Lennar," https://www.resiclubanalytics.com/p/warren-buffett-successor-greg-abel-third-housing-market-bet-lennar-stock
• Kalkine Media, "Berkshire Hathaway Reveals 12.5% Ownership Stake in Lennar Corporation," https://kalkinemedia.com/us/news/announcements/berkshire-hathaway-reveals-125-ownership-stake-in-lennar-corporation
• 24/7 Wall St., "Berkshire Hathaway adds to its Lennar stake at $80 a share," https://247wallst.com/cards/berkshire-hathaway-kept-buying-lennar-through-a-slump-in-hom-len-person-insider-trade-01m48d12wwvktkqc3bvzgbx0mp
• BigGo Finance, "Berkshire Hathaway Bucks the Trend, Lifts Lennar Stake to 11.2%," https://finance.biggo.com/news/15e8f089-49a6-4500-a969-f73e695bde88
• The Motley Fool, "Berkshire Hathaway Is Buying Up Shares of This Beaten-Down Stock. Should You Invest Too?" https://www.fool.com/investing/2026/10/03/berkshire-hathaway-is-buying-up-shares-of-this-bea/
• TheStreet, "Buffett's Berkshire increases exposure to blue-chip housing stock," https://www.thestreet.com/investing/stocks/len-warren-buffett-berkshire-lennar-stock-housing
• Lennar Corporation, "Lennar Reports Third Quarter 2026 Results," https://newsroom.lennar.com/2026-09-16-Lennar-Reports-Third-Quarter-2026-Results
• Lennar Corporation, Form 8-K (Q1, Q2, Q3 FY2026 results) and Form 10-Q filings, SEC EDGAR, https://www.sec.gov/
• HousingWire, "Lennar defends even-flow, land banking strategy as risks build," https://www.housingwire.com/articles/lennar-q3-2026-earnings/
• Investing.com, "Earnings call transcript: Lennar misses Q3 2026 estimates as housing demand softens," https://www.investing.com/news/transcripts/earnings-call-transcript-lennar-misses-q3-2026-estimates-as-housing-demand-softens-93CH-4906240
• The Motley Fool, "Lennar (LEN) Q3 2026 Earnings Call Transcript," https://www.fool.com/earnings/call-transcripts/2026/09/17/lennar-len-q3-2026-earnings-call-transcript/

💥Disclaimer: 

This article is for informational and educational purposes only and does not constitute financial or investment advice, nor a recommendation to buy or sell any security. The story of "Dennis Hartley" is an illustrative composite based on commonly reported investor behavior, not an account of a real, named individual. Berkshire Hathaway's reasons for its investment have not been fully disclosed, and any interpretation of its motives here is speculative. Stock prices, ownership figures, and company results change frequently — please verify current data directly with SEC filings and live sources, and consult a licensed financial advisor before making investment decisions.