THE VAULT MEMO
The public record, decoded. Every week we take one real document, a Fed statement, an SEC filing, a hearing, and dig out the part that touches your money, in plain English.
Warren Buffett is famous for playing it safe. Careful, diversified, patient. That is the reputation. His own SEC filing tells a different story.
Four times a year, every big investment manager in America has to show its hand. The form is called a 13F. It is public, it is free, and it sits on the SEC's website. Berkshire Hathaway filed its latest one on May 15, covering the quarter that ended March 31.
Here is what it shows.
Berkshire's US stock portfolio is worth about $263 billion, spread across roughly 90 positions. Ninety names sounds spread out. It is not.
Apple alone is about $57.8 billion. That is 22 percent of the entire book in one stock.
Add the next four (American Express, Bank of America, Coca-Cola, and Chevron) and the top five holdings come to about $176.6 billion. That is 67 percent of everything. Two thirds of the most famous portfolio in the world sits in five names.
What this means for you: concentration here is not recklessness, it is conviction. Buffett bets big on a few businesses he understands deeply and lets them run. The takeaway is not "copy him." The takeaway is that the "careful" label does not match his own filing, and checking took about a minute on a public website. Read the document, not the reputation.
One layer deeper: what a 13F will never tell you
This is the part the headlines skip. A 13F only shows US-listed stock positions. Which means three big things are invisible:
1. The cash. Berkshire's famous cash pile does not appear in a 13F at all. The filing shows the stock bets, not the dry powder waiting behind them.
2. Foreign holdings. Shares listed outside the US, like Berkshire's well known Japanese positions, never show up. The real portfolio is bigger than the form.
3. The lag. Managers get 45 days after the quarter ends to file. This one covers March 31 and landed May 15. By the time you read any 13F, the positions may have already changed.
So the smart way to read a 13F is for structure, not stock tips: where the conviction sits, how concentrated the book is, what changed since last quarter. That is exactly how we read this one.
The five decodes of the week
Everything the machine caught this week, in one breath each:
1. The Fed deleted its plan to cut rates. One sentence vanished from the policy statement, and the promise of cheaper loans went with it. The Fed's own dot plot backs it up: 3.8 percent penciled in through the end of 2026.
2. The jobs report looked calm. The revisions did not. 57,000 jobs added, but the two prior months were quietly marked down by a combined 74,000. Hiring is cooling under the surface.
3. Prices fell 0.4 percent, the biggest monthly drop since April 2020. Gasoline did the heavy lifting at minus 9.7 percent. Core prices did not budge, so the Fed is not calling it over.
4. A company told the SEC to stop trusting its own numbers. AeroVironment's 8-K admitted its real quarterly loss was understated by about $87 million. The press release stayed calm. The filing did not.
5. The CEO "buying" that was actually a paycheck. One column on a Form 4 tells you everything: code P means bought with his own cash, code A means the company handed it to him. His were all A.
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Educational only. Not financial advice. Some content produced with AI assistance (voiceover and editing).