The Buffett Tracker: what it follows, what a 13F can and can't tell you about Berkshire Hathaway, and how following works

I'm Chris, co-founder of Autopilot. The Buffett Tracker follows Berkshire Hathaway's quarterly 13F filing. When the filing posts, up to 45 days after quarter end, the Portfolio updates and your account follows it. Warren Buffett has nothing to do with it. Here's what that gets you and what it doesn't.

One thing first, because we're an SEC-registered investment adviser and I have to say it. Autopilot is the app. The actual investment advice comes from Autopilot Advisers, LLC. If you want the full legal version of anything in here, it's on our legal page.

1) Who Buffett is and what the tracker actually follows

Buffett doesn't run this. We read what Berkshire files and follow it after the filing becomes public. A 13F can be filed any time after quarter end, but the deadline is 45 days.

Berkshire Hathaway is the company Buffett ran from 1965 until he handed the chief executive job to Greg Abel at the start of 2026, staying on as chairman, and its stock portfolio is the most-watched one in the world because he ran Berkshire for 60 years and its stock filings are public. The filing is Berkshire's, not his personally; other people at Berkshire have run parts of the stock portfolio for years. He buys cash-flow-positive companies and holds them for years, sometimes decades. Berkshire, like every institutional investment manager that meets the SEC's $100 million threshold for Section 13(f) securities, has to file a Form 13F with the SEC within 45 days after each calendar quarter ends, listing its long US stock positions as of the last day of that quarter. The filer of record is Berkshire Hathaway Inc.

The Buffett Tracker is a Portfolio that Autopilot Advisers built and runs from that filing. It launched on Autopilot on January 3, 2023. Berkshire isn't paid by it, doesn't know about it, and hasn't endorsed anything.

2) What a 13F shows for Berkshire, and what it hides

Of all the 13Fs people follow, Berkshire's is the one that comes closest to a real portfolio. Two reasons. Berkshire holds relatively few names for the size of the money, so the big positions are really big. And Buffett turns over slowly, so a position that shows up on a filing is likely still there when you read it, which matters because the filing starts behind the original trade. Sometimes by days. Sometimes by months.

Here's what the filing still hides.

• Anything that isn't a US-listed security. Berkshire has held large positions outside the US that don't appear on a 13F.
• Positions under a confidential treatment request. The SEC lets a manager delay disclosing a position it's still building. Berkshire has used that. So a filing can be complete and still be missing something.
• The rest of Berkshire. The insurance companies, the railroad, the utilities, the operating businesses, and the cash pile aren't in a 13F. The filing is the stock portfolio, which is one piece of a much bigger company.
• Timing and price. 13Fs don't have a purchase date. They only have the ending date. You can see that a position grew or shrank between two quarters. You can't see when or at what price.

I wrote the general version of all this in What's a 13F, and can you actually see what Warren Buffett bought last quarter?.

3) How the tracker turns the filing into a Portfolio

What I can say without checking: the Portfolio only changes when a new filing posts, because that's the only time there's new public information. And because your account is a different size than Berkshire's by a factor I can't type, the position sizes in your account are yours, not theirs.

4) How it runs in your account

You connect the brokerage you already have, pick the Buffett Tracker, and set how much follows it. Then you give Autopilot Advisers limited authority to send orders to that account. When the Portfolio changes, we send them and your broker fills them. The money stays put.

You're never trading at the same time as Berkshire. You're trading after a filing that came out weeks after Berkshire did.

5) What to check on the fact sheet before you follow it

The Buffett Tracker fact sheet shows what real client accounts following it did from January 3, 2023, gross and modeled net, with drawdown, volatility, a risk band, and a date on every figure. It's a live composite of follower accounts. It is not Berkshire's return and it's not a backtest of Buffett's record.

Five things to read on it: live or backtest (it says live), the window and start date, gross and modeled net side by side, the worst drawdown, and the date. I wrote how to read the whole sheet in How to read a Portfolio's track record before you follow it.

6) The limits, plainly

The filing starts you behind. Sometimes by days. Sometimes by months. You get the long stock book and nothing else Berkshire owns. You get no cash position, which is a big part of how Buffett actually runs Berkshire. Your position sizes aren't his. And a filing can be missing a position he's still building. If you're fine with all of that, the tracker gives you a way to follow the disclosed direction of the most-watched portfolio in the world without doing it by hand every quarter.

Frequently asked questions

Berkshire Hathaway latest 13F holdings

Berkshire's most recent 13F is always on the SEC's EDGAR site, filed within 45 days after the quarter ended, and it lists Berkshire's long US stock positions as of the last day of that quarter. I don't reprint holdings here because this page doesn't change and the filing does. Autopilot's Buffett Tracker follows each filing after it posts, in your own brokerage account.

Warren Buffett portfolio tracker app

Autopilot's Buffett Tracker is a Portfolio that follows Berkshire Hathaway's quarterly 13F filings after they post, sending the orders to the brokerage account you already have. Buffett doesn't run it. It launched on Autopilot on January 3, 2023 and has a public fact sheet showing what follower accounts did, gross and modeled net, with the 45-day delay disclosed as a risk.

How do I copy Warren Buffett's portfolio?

You can't buy what he buys when he buys it, because Berkshire's trades only become public when a 13F is filed. What you can do is follow the filing after it posts. Autopilot's Buffett Tracker does that in your own brokerage account: connect your brokerage, pick the Portfolio, and when a new filing posts, the Portfolio updates and your account follows. Your holdings won't match Berkshire's exactly. The filing starts behind the original trade. Sometimes by days. Sometimes by months.

What did Berkshire Hathaway sell last quarter?

Compare Berkshire's two most recent 13F filings on EDGAR: a position that shrank or disappeared between them was reduced or sold at some point during the quarter, though the filing won't tell you when or at what price. I don't list sales here because this page is written to stay accurate for years. I explain how to read the filing yourself in "How to see what Berkshire Hathaway bought in any quarter."

TLDR

Berkshire files a 13F within 45 days of quarter end. The Buffett Tracker follows it, in your own brokerage, with the money staying put. Buffett isn't involved. Read the fact sheet, then decide. If it holds up, choose a Portfolio and connect your brokerage. Then give Autopilot Advisers limited authority to send orders to that account. When the Portfolio changes, we send them and your broker fills them. Depending on your plan and brokerage, you may need to confirm first. The money stays put.

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Since Autopilot Advisers is an SEC-registered investment adviser, we have to put disclaimers on stuff like this. They're below, and the full version is on our legal page.

Disclosures

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Berkshire Hathaway and Warren Buffett are not affiliated with Autopilot and have not endorsed it. The Buffett Tracker is created and managed by Autopilot Advisers, LLC from public Form 13F filings; Berkshire Hathaway does not manage this Portfolio and has no relationship with Autopilot or its clients. Descriptions of Form 13F reflect Section 13(f) of the Securities Exchange Act and SEC rules as generally understood at the publish date. References to Berkshire's disclosed positions describe public filings and are not a performance claim or a recommendation.