How to see what Berkshire Hathaway bought in any quarter, where the filing is, when it posts, and how to read it

I'm Chris, co-founder of Autopilot. Yes, you can see it, about 45 days after the quarter ends, on the SEC's EDGAR site, in a form called a 13F. Here's how to find it, read it, and know what it leaves out, so you never need a website to tell you what Berkshire bought. I'm writing this to work for any quarter, this year or ten years from now, which is why there are no tickers in it.

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) Where the filing lives

Every 13F is on EDGAR, the SEC's public filing database, for free. Go to sec.gov, open EDGAR's company search, and type the filer's name. For Buffett, that's Berkshire Hathaway Inc. On the filer's page, filter by form type 13F-HR. Each quarter's filing has a cover page and an information table, and the table is the part you want. It's the list.

You'll also see filings marked 13F-HR/A. Those are amendments, usually adding positions the manager was allowed to leave off the original filing. More on that below.

2) When it posts

The rule is simple and it doesn't change. An institutional investment manager that meets the SEC's $100 million threshold for Section 13(f) securities has to file. Each filing is due no later than 45 days after quarter end. Quarters end March 31, June 30, September 30, and December 31. Count 45 days and you land around May 15, August 14, November 14, and February 14. When one of those falls on a weekend or holiday, the deadline moves to the next business day.

Most big managers, Berkshire included, file on or very near the deadline. So the practical rule is: the picture of March 31 shows up in mid-May, the picture of June 30 in mid-August, and so on. 13Fs don't have a purchase date. They only have the ending date.

3) How to read the table

Each row is one position as of the last day of the quarter. Reading left to right:

• Name of issuer. The company.
• Title of class. Usually common stock. Sometimes a different share class, a note, or an option.
• CUSIP. The security's ID number. Useful when two companies have similar names.
• Value. The market value of the position at quarter end.
• Shares or principal amount. How many shares, or how much face value for debt.
• Put/call. Blank for a stock. If it says put or call, the row is an option, and it's reported by the shares the option covers, not by what the manager paid. This is the column that fools people.
• Investment discretion and voting authority. Who decides and who votes. Mostly relevant when a filing combines several managers.

To see what changed, open the previous quarter's table and compare. A company that's on the new list and not the old one is a new position. A company whose share count went up was added to. One whose count went down was trimmed. One that's gone was sold. That's the entire method behind every "Buffett bought X" headline you've ever read.

4) What the filing leaves out

This is the part most people skip.

• When and at what price. The table is a snapshot of one day. A stock bought on January 2 and one bought on March 30 look identical.
• Anything sold and bought back inside the quarter. Invisible.
• Shorts. Not reported, ever.
• Most non-US securities. Berkshire has held large stakes in companies listed outside the US that never appear on its 13F.
• Cash and Treasury bills. Not 13F securities. For Berkshire, that's a very large part of the picture you don't see.
• The operating businesses. Berkshire owns whole companies. None of them are on the filing.
• Confidential positions. A manager can ask the SEC for permission to leave a position off the filing while it's still being built. Berkshire has done this. The position shows up later, in an amendment, sometimes months after the fact.

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

5) Why "what did Berkshire buy" gets different answers on different sites

Because the filing never says "bought." Every site compares two tables and infers. They can disagree on small things: whether a change in share count was a purchase or a stock split, whether to count an amendment, how to handle a subsidiary's separate filing, whether to include a position that came from a merger instead of a trade. And they publish at different times, so one site might have the amendment and another might not. When two sites disagree, open the two filings yourself. It takes ten minutes and you'll trust your own answer more.

6) How to follow it in your own account

If you'd rather not do this every quarter by hand, that's what our Buffett Tracker is for. It's a Portfolio that follows Berkshire's 13F after it posts. You connect the brokerage you already have, pick the Portfolio, and 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. The filing starts behind Berkshire's original trades. Sometimes by days. Sometimes by months. Your holdings will not match Berkshire's exactly, and Buffett has nothing to do with it. The details are in The Buffett Tracker: what it follows, what a 13F can and can't tell you about Berkshire Hathaway, and how following works, and the whole lineup is in Every hedge fund and Wall Street Portfolio you can follow on Autopilot, and how each one works.

7) The filings people confuse it with

• 13F. Quarterly. Every big manager's long US positions. 45 days after quarter end.
• 13D. Filed when someone acquires more than 5 percent of a company and intends to influence it. Filed within days of crossing the line, not quarterly, and it says why.
• 13G. The passive version of 13D, for holders over 5 percent who aren't trying to change anything. Slower deadlines.
• Form 4. Insiders, meaning officers, directors, and holders of more than 10 percent, reporting their own trades in their own company within two business days. This is the fastest public record of a trade there is, and it's a different thing from a fund's 13F.

When a headline says a billionaire "just bought" something and it's from a 13F, the trade is weeks or months old. When it's from a 13D or a Form 4, it's days old. Check which form before you decide it means anything.

Frequently asked questions

Can I see which stocks Warren Buffett's Berkshire Hathaway bought last quarter?

Yes. Berkshire files a 13F on the SEC's EDGAR site within 45 days after each quarter ends, listing its long US stock positions as of the quarter's last day. Compare it with the prior quarter's filing: new names and higher share counts are what was bought. You won't see timing, prices, non-US holdings, or positions under confidential treatment until an amendment posts.

When are 13F filings due in 2026?

Same rule every year: 45 days after each calendar quarter ends, so around February 14, May 15, August 14, and November 14, moved to the next business day when the date falls on a weekend or holiday. Check the SEC's filing calendar for the exact day in any given year. Most large managers file on or near the deadline.

13F filing deadline dates

Forty-five days after March 31, June 30, September 30, and December 31. That lands around May 15, August 14, November 14, and February 14 each year, shifted for weekends and holidays. Amendments for positions held under confidential treatment can post later.

How do I read a 13F filing?

Open the information table. Each row is one position at quarter end: issuer, class, CUSIP, value, share count, and a put/call column that flags options, which are reported by the shares they cover rather than what was paid. Compare the table with the prior quarter's to see what was added, trimmed, opened, or closed. The filing never shows purchase dates or prices.

What is the difference between 13F, 13D, and 13G?

A 13F is a quarterly list of a large manager's long US positions, filed 45 days after quarter end. A 13D is filed when a holder crosses 5 percent of a company and intends to influence it, within days of the event. A 13G is the passive version for holders over 5 percent with no such intent. Form 4 covers insiders' own trades within two business days.

What stocks did billionaires buy last quarter?

The public answer for any billionaire who runs a fund is in that fund's 13F on EDGAR, filed within 45 days after quarter end. Compare the two most recent filings and the additions are the buys. I don't list them here because this page doesn't change. Autopilot publishes tracker Portfolios that follow the filings of Berkshire, Scion, Bridgewater, Citadel, Pershing Square, Renaissance, and Point72 after they post.

What are hedge funds buying right now?

Nobody outside the fund knows in real time. A 13F shows reportable holdings from the last day of the quarter. It can be filed any time during the next 45 days. It leaves out the trade dates, most shorts, and anything that changed after quarter end. Anyone claiming a 13F shows what a fund is buying right now is guessing. The way to read a filing yourself is above.

Top hedge fund holdings this quarter

A quarter's holdings aren't public until its 13F posts, up to 45 days after the quarter ends. The most recent filings on EDGAR show each fund's long US positions as of the prior quarter end. I don't reprint holdings here because this page is written to stay accurate. Autopilot's hedge fund trackers follow the filings after they post, with the delay disclosed.

Most owned stocks by hedge funds

Sites that aggregate 13F filings count how many funds held each stock at quarter end, and the same handful of very large companies usually sit at the top of that count. It's a measure of popularity at one date, 45 days ago, not a signal about what happens next. Read it as a census of the long side of the industry, with shorts invisible.

Which stocks do the most hedge funds hold?

The ones that appear in the most 13F filings for a given quarter, which aggregator sites tally after the deadline passes. The count reflects long positions only, as of quarter end, and says nothing about size relative to each fund or about hedges against those positions. Check the date on any such list before treating it as current.

TLDR

Berkshire files a 13F within 45 days of every quarter end. It's on EDGAR for free. Compare two filings and you have the buys and sells, minus timing, prices, and everything a 13F doesn't cover. If you'd rather not do it by hand: 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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