Berkshire Hathaway (BRK-B) insider buying and selling
Every Table I transaction reported by directors and officers of S&P 500 companies on SEC Form 4 filings (2 business days to file): each row labeled with its official transaction code, nothing filtered out beforehand.
Open-market purchases (code P) are the rare signal, in green; sales (code S) are common and often pre-scheduled (10b5-1). Table II (derivatives) is not included: its prices are exercise prices, not market values. Guide: insider buying.
| Date | Ticker | Insider | Role | Shares | Price | Amount | % of stake | Type / filing |
|---|
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Berkshire Hathaway Inc. (BRK-B) insider buying and selling: 2 purchases, 2 sales
19 Form 4 Table I transactions filed with the SEC by Berkshire Hathaway Inc. insiders between 2025-09-26 and 2026-09-29 (15-month history): 2 open-market purchases and 2 sales, plus 15 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $20.0M by Jain Ajit on 2026-09-28.
Berkshire Hathaway insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, Berkshire Hathaway insiders filed 2 purchases worth $501k and 1 sale worth $20.0M on the open market. The net balance is on the sell side: $19.5M more sold than bought.
The biggest buyer was O'Sullivan Michael J. (See Remarks): $501k in 2 purchases, the only buyer. The biggest seller was Jain Ajit (Vice Chairman): $20.0M in 1 sale, the only seller.
The largest trade of the period was a sale of $20.0M on Sep 28, 2026, by Jain Ajit (Vice Chairman). Form 4 on sec.gov (0001728451-26-000004).
The only sale does not carry the 10b5-1 plan flag on the Form 4 (sales scheduled months ahead).
The last three months show 1 purchase and 1 sale, against 1 and 0 in the three before. The latest purchase is from Aug 12, 2026; the latest sale from Sep 28, 2026.
Against its sector (Financial Services, 70 companies with an insider page on this site), over the same dates the median is 10 sales and 0 purchases on the open market. Berkshire Hathaway has more sales than 4 of the other 69, ranks 36 of 70 by net dollars sold, and 32 of the 70 have at least one purchase, Berkshire Hathaway included.
The 19 most important trades
The 2 open-market purchases first, then the rest, each type from largest to smallest. The full history is in the tool above, already searched.
See all 19 BRK-B trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2026-05-06 | 2026-05-06 | O'Sullivan Michael J. | See Remarks | $251k | P — Open-market purchase Indirect holding, through: By Trust 2 Form 4 footnotesF1 The reported price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $ 467.07 to $ 467.20 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. F2 Shares held by a living trust of which the reporting person is trustee. | SEC |
| 2026-08-12 | 2026-08-13 | O'Sullivan Michael J. | See Remarks | $250k | P — Open-market purchase Indirect holding, through: By Trust 4 Form 4 footnotesF1 The reported price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $510.58 to $510.68 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. F4 Shares held by a living trust of which the reporting person is trustee. F2 The reported price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $512.42 to $512.54 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. F3 The reported price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $513.60 to $513.64 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. | SEC |
| 2026-09-28 | 2026-09-29 | Jain Ajit | Vice Chairman | $20.0M | S — Open-market sale Indirect holding, through: By Jain Foundation Inc. (Non-Profit Corporation) Form 4 footnoteF1 On September 28th, the non-profit corporation Jain Foundation, Inc. sold 39,700 shares of Class B Common Stock at an average price of $503.092592. Upon request by Berkshire Hathaway Inc., any security holder thereof, or the staff of the Securities and Exchange Commission, the Reporting Person can provide full information regarding the specific pricing of individual sales. | SEC |
| 2025-09-26 | 2025-09-26 | Jain Ajit | Vice Chairman | S — Open-market sale Indirect holding, through: By Jain Foundation Inc. (Non-Profit Corporation) Form 4 footnoteF1 15,000 shares of Class B Common Stock were sold at an average price of $500.99805 per share, with a range of $501.36 to $500.63 per share. | SEC | |
| 2026-09-03 | 2026-09-04 | Jain Ajit | Vice Chairman | G — GiftForm 4 footnoteF1 On September 3rd, the Reporting Person made charitable gifts totaling 10 shares of Class B Common stock. | SEC | |
| 2026-07-14 | 2026-07-15 | Buffett Warren E | Director | C — Conversion of a derivative | SEC | |
| 2026-07-14 | 2026-07-15 | Buffett Warren E | Director | G — GiftForm 4 footnoteF1 Each of these reported transactions was a gift from Warren E. Buffett to a charitable organization. | SEC | |
| 2026-07-01 | 2026-07-02 | Jain Ajit | Vice Chairman | G — GiftForm 4 footnoteF1 On July 1st, the Reporting Person made charitable gifts totaling 3 shares of Class B Common Stock. | SEC | |
| 2026-05-22 | 2026-05-26 | Buffett Warren E | Director | G — GiftForm 4 footnoteF1 The reported transaction was a gift from Warren E. Buffett to a charitable organization. | SEC | |
| 2026-05-18 | 2026-05-20 | Buffett Warren E | Director | C — Conversion of a derivative | SEC | |
| 2026-05-18 | 2026-05-20 | Buffett Warren E | Director | G — GiftForm 4 footnoteF1 Each of these reported transactions was a gift from Warren E. Buffett to a charitable organization. | SEC | |
| 2026-05-14 | 2026-05-18 | Guyman Charlotte | Director | G — GiftForm 4 footnoteF1 The reported transaction consists of gifts from Charlotte Guyman of 82 shares each of Class B common stock to seven individuals. | SEC | |
| 2026-03-27 | 2026-03-27 | Jain Ajit | Vice Chairman | G — GiftForm 4 footnoteF1 On March 27th, the Reporting Person made charitable gifts totaling 22 shares of Class B Common Stock. | SEC | |
| 2025-11-10 | 2025-11-12 | Buffett Warren E | Chairman and CEO | C — Conversion of a derivative | SEC | |
| 2025-11-10 | 2025-11-12 | Buffett Warren E | Chairman and CEO | G — GiftForm 4 footnoteF1 Each of these reported transactions was a gift from Warren E. Buffett to a charitable organization. | SEC | |
| 2025-11-03 | 2025-11-05 | Guyman Charlotte | Director | C — Conversion of a derivative | SEC | |
| 2025-11-03 | 2025-11-05 | Guyman Charlotte | Director | G — GiftForm 4 footnoteF1 The reported transaction consists of gifts from Charlotte Guyman of 82 shares each of Class B common Stock to five charitable organizations. | SEC | |
| 2025-10-22 | 2025-10-24 | Jain Ajit | Vice Chairman | G — GiftForm 4 footnoteF1 On October 22nd, the Reporting Person made charitable gifts totaling 32 shares of Class B Common Stock. | SEC | |
| 2025-09-24 | 2025-09-26 | Jain Ajit | Vice Chairman | G — GiftForm 4 footnoteF1 On September 24th, the Reporting Person made charitable gifts totaling 32 shares of Class B Common Stock. | SEC |
The period balance: money in, money out
Across the Form 4 filings submitted between Sep 26, 2025 and Sep 29, 2026, Berkshire Hathaway Inc. open-market activity adds up to 2 purchases worth $501k and 2 sales worth $20.0M. The net balance is $19.5M on the sell side. Of those 4 open-market trades, 1 arrives with no usable amount —the filing reports no price, or reports one out of scale and the derived amount is voided—: it counts in the trade count and adds zero dollars here.
Only codes P and S count, where an insider puts in or takes out their own money. A selling balance like Berkshire Hathaway Inc.'s is the norm in the S&P 500, where much of the pay comes as stock. It is not a recommendation to buy or sell: it is what was filed.
Every transaction, code by code
| Code | What it means | Trades | Reported amount |
|---|---|---|---|
| G | Gift | 11 | $0 |
| C | Conversion of a derivative | 4 | $0 |
| P | Open-market purchase | 2 | $501k |
| S | Open-market sale | 2 | $20.0M |
| Total | Everything filed in the period | 19 | $20.5M |
16 of the 19 rows carry no usable amount on the Form 4: they count as trades and add $0. The code labels come from the SEC index.
Who has traded
Over the 15 months of history, 4 distinct people or entities have filed Berkshire Hathaway Inc. transactions: 1 bought on the open market and 1 sold. Counted by CIK, the fixed number the SEC gives each filer, and not by name, which each filer types their own way.
| Filer | Role | Transactions | Bought (count) | Sold (count) | Last filed |
|---|---|---|---|---|---|
| Jain Ajit | Vice Chairman | 7 | — | $20.0M (2) | 2026-09-29 |
| O'Sullivan Michael J. | See Remarks | 2 | $501k (2) | — | 2026-08-13 |
| Buffett Warren E | Director | 7 | — | — | 2026-07-15 |
| Guyman Charlotte | Director | 3 | — | — | 2026-05-18 |
The name links to all their trades, in any company. "Transactions" counts any code; the money, open market only. Role: from their latest filing.
Month by month
By the month the trade was executed, not the month it was filed; months with no trades show zero. The busiest month was Sep 2025: 0 purchases and 1 sale, worth $0. 11 of the 15 months have none.
| Month | Purchases | Amount | Sales | Amount |
|---|---|---|---|---|
| Aug 2025 | 0 | $0 | 0 | $0 |
| Sep 2025 | 0 | $0 | 1 | $0 |
| Oct 2025 | 0 | $0 | 0 | $0 |
| Nov 2025 | 0 | $0 | 0 | $0 |
| Dec 2025 | 0 | $0 | 0 | $0 |
| Jan 2026 | 0 | $0 | 0 | $0 |
| Feb 2026 | 0 | $0 | 0 | $0 |
| Mar 2026 | 0 | $0 | 0 | $0 |
| Apr 2026 | 0 | $0 | 0 | $0 |
| May 2026 | 1 | $251k | 0 | $0 |
| Jun 2026 | 0 | $0 | 0 | $0 |
| Jul 2026 | 0 | $0 | 0 | $0 |
| Aug 2026 | 1 | $250k | 0 | $0 |
| Sep 2026 | 0 | $0 | 1 | $20.0M |
| Oct 2026 | 0 | $0 | 0 | $0 |
The last month may be partial: a Form 4 is filed up to two business days later. The table does not say whether the pattern is good or bad; it says when it happened.
Berkshire Hathaway Inc. (BRK-B) analysis page →
Other Financial Services companies with insider trades
All 500 are listed in the section index →
Which insiders are buying their own company stock →
How to read this data
None of the 2 sales in the table is flagged as scheduled (10b5-1 plan), the kind signed months ahead and executed automatically. Berkshire Hathaway's 2 open-market purchases (code P) are the rare signal: insiders are already paid in stock, so buying more means putting in their own money. The latest filing is from Sep 29, 2026, and a Form 4 arrives up to two business days after the trade.
15 of the 19 rows in the table carry footnotes from the Form 4 itself, folded into the code column and copied verbatim; a row with no footnote means the filing has none.
Guide: Insider buying · all guides
What is behind these trades
The concepts on this page, explained from scratch in the Academy. Free, no account.
- What the efficiency hypothesis says and what it does NOT sayIf an insider's purchase is public and anyone can read it, is there any information left in it? That is the exact question that brings people here.
- Who really moves the market: the types of investorWho sits on the other side of each order, and where a company's own insiders fit among them.
- Supply, demand and price: why it rises and falls constantlyHow a piece of news ends up inside the price, and why the reaction to a filed sale is rarely the one you would expect.
Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.