Company / CIK 0001067983
BERKSHIRE HATHAWAY INC
- Size, estimated from filings
- Mega cap ($200B and up)
- Insiders on file
- 6
- Members of Congress who traded it
- 17
- Federal contracts on record
- none matched
- Lobbying filings on record
- none matched
- SEC filings
- EDGAR ↗
- Latest trade on record
- October 21, 2026
BERKSHIRE HATHAWAY INC (BRK-B) has 6 insiders on file who disclosed 52 transactions in the last 12 months (25 open-market buys, 1 sale, about $35.1M at reported prices), and 37 congressional trades in its stock are on record. No federal contract award that started in the last 180 days was found for a recipient with exactly this name; no lobbying filing names it as client this year.
BERKSHIRE HATHAWAY INC in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
8 people account for the disclosed buying and selling in BERKSHIRE HATHAWAY INC over the last 12 months; the most active is Jain Ajit with $20M.
Insiders
| Name | Role | Rows | Bought | Sold | Last filed |
|---|---|---|---|---|---|
| Jain Ajit | Vice Chairman | 6 | 0 | 1 | October 23, 2026 |
| O'Sullivan Michael J. | See Remarks | 5 | 5 | 0 | August 13, 2026 |
| Chang Charles C | See Remarks | 2 | 0 | 0 | August 13, 2026 |
| BUFFETT WARREN E | Director | 18 | 0 | 0 | July 15, 2026 |
| GUYMAN CHARLOTTE | Director | 4 | 0 | 0 | May 18, 2026 |
| Abel Gregory E. | See Remarks | 18 | 0 | 0 | March 5, 2026 |
Rows are this company's Form 4 rows for each person. "Bought" and "sold" count open-market purchases (code P) and sales only. More in insider buying and insider selling.
Members of Congress who traded BRK-B
From periodic transaction reports that name the company's stock. Amounts are the sums of the ranges as filed. Every row is on the BRK-B page.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| Jerry Moran | Senator (KS), Republican | 6 | 6 | 0 | $20K–$125K | June 23, 2026 |
| Gilbert Ray Cisneros, Jr. | Representative (CA, District 31), Democrat | 5 | 2 | 3 | $5,005–$75K | March 25, 2026 |
| Maria Elvira Salazar | Representative (FL, District 27), Republican | 4 | 3 | 1 | $18K–$95K | September 24, 2026 |
| Richard McCormick | Representative (GA, District 7), Republican | 3 | 3 | 0 | $3,003–$45K | September 18, 2026 |
| Christian D. Menefee | Representative (TX, District 18), Democrat | 3 | 0 | 3 | $31K–$115K | February 10, 2026 |
| Lisa C. McClain | Representative (MI, District 9), Republican | 3 | 1 | 2 | $3,003–$45K | October 31, 2025 |
| Josh Gottheimer | Representative (NJ, District 5), Democrat | 2 | 0 | 2 | $2,002–$30K | May 4, 2026 |
| Tina Smith | Senator (MN), Democrat | 2 | 0 | 2 | $200K–$500K | March 31, 2026 |
| Alan Armstrong | Senator (OK), Republican | 1 | 1 | 0 | $50K–$100K | March 27, 2026 |
| Mark Alford | Representative (MO, District 4), Republican | 1 | 0 | 1 | $1,001–$15K | March 16, 2026 |
| August Pfluger | Representative (TX, District 11), Republican | 1 | 1 | 0 | $15K–$50K | March 13, 2026 |
| Robert P. Bresnahan, Jr. | Representative (PA, District 8), Republican | 1 | 0 | 1 | $50K–$100K | November 19, 2025 |
| Markwayne Mullin | Senator (OK), Republican | 1 | 0 | 1 | $15K–$50K | November 3, 2025 |
| Marjorie Taylor Greene | Representative (GA, District 14), Republican | 1 | 1 | 0 | $1,001–$15K | October 24, 2025 |
| Eleanor Holmes Norton | Representative (DC, District 0), Democrat | 1 | 0 | 1 | $15K–$50K | October 14, 2025 |
Insider transactions
| Filer | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jain Ajit | BRK-B | Other G | October 21, 2026 | October 23, 2026 | 2d | 19 | — | — | Form 4 ↗ | ||
| Jain Ajit | BRK.A | Sell S | September 28, 2026 | September 29, 2026 | 1d | 39,700 | $503 | $20.0M | indirect | Form 4 ↗ | |
| Jain Ajit | BRK.A | Other G | September 3, 2026 | September 4, 2026 | 1d | 10 | — | — | Form 4 ↗ | ||
| Chang Charles C | BRK.A | Option / conversion P | August 12, 2026 | August 13, 2026 | 1d | 1 | $765,184 | $765K | indirectderivative | Form 4 ↗ | |
| Chang Charles C | BRK.A | Option / conversion P | August 12, 2026 | August 13, 2026 | 1d | 1 | $765,190 | $765K | indirectderivative | Form 4 ↗ | |
| O'Sullivan Michael J. | BRK.B | Buy P | August 12, 2026 | August 13, 2026 | 1d | 43 | $514 | $22K | indirect | Form 4 ↗ | |
| O'Sullivan Michael J. | BRK.B | Buy P | August 12, 2026 | August 13, 2026 | 1d | 400 | $513 | $205K | indirect | Form 4 ↗ | |
| O'Sullivan Michael J. | BRK.B | Buy P | August 12, 2026 | August 13, 2026 | 1d | 45 | $511 | $23K | indirect | Form 4 ↗ | |
| BUFFETT WARREN E | BRK.A | Exchange C | July 14, 2026 | July 15, 2026 | 1d | 8,000 | — | — | derivative | Form 4 ↗ | |
| BUFFETT WARREN E | BRK.A | Other G | July 14, 2026 | July 15, 2026 | 1d | 1,000,000 | — | — | Form 4 ↗ | ||
| BUFFETT WARREN E | BRK.A | Other G | July 14, 2026 | July 15, 2026 | 1d | 1,000,000 | — | — | Form 4 ↗ | ||
| BUFFETT WARREN E | BRK.A | Other G | July 14, 2026 | July 15, 2026 | 1d | 1,000,000 | — | — | Form 4 ↗ | ||
| BUFFETT WARREN E | BRK.A | Other G | July 14, 2026 | July 15, 2026 | 1d | 9,000,000 | — | — | Form 4 ↗ | ||
| BUFFETT WARREN E | BRK.A | Exchange C | July 14, 2026 | July 15, 2026 | 1d | 12,000,000 | — | — | Form 4 ↗ | ||
| Jain Ajit | BRK.A | Other G | July 1, 2026 | July 2, 2026 | 1d | 3 | — | — | Form 4 ↗ | ||
| BUFFETT WARREN E | BRK.A | Other G | May 22, 2026 | May 26, 2026 | 4d | 160 | — | — | Form 4 ↗ | ||
| BUFFETT WARREN E | BRK.A | Exchange C | May 18, 2026 | May 20, 2026 | 2d | 25 | — | — | derivative | Form 4 ↗ | |
| BUFFETT WARREN E | BRK.A | Other G | May 18, 2026 | May 20, 2026 | 2d | 18,646 | — | — | Form 4 ↗ | ||
| BUFFETT WARREN E | BRK.A | Other G | May 18, 2026 | May 20, 2026 | 2d | 18,646 | — | — | Form 4 ↗ | ||
| BUFFETT WARREN E | BRK.A | Exchange C | May 18, 2026 | May 20, 2026 | 2d | 37,500 | — | — | Form 4 ↗ | ||
| GUYMAN CHARLOTTE | BRK-B | Other G | May 14, 2026 | May 18, 2026 | 4d | 574 | — | — | Form 4 ↗ | ||
| O'Sullivan Michael J. | BRK-B | Buy P | May 6, 2026 | May 6, 2026 | 0d | 53 | $470 | $25K | indirect | Form 4 ↗ | |
| O'Sullivan Michael J. | BRK-B | Buy P | May 6, 2026 | May 6, 2026 | 0d | 483 | $467 | $226K | indirect | Form 4 ↗ | |
| Jain Ajit | BRK-B | Other G | March 27, 2026 | March 27, 2026 | 0d | 22 | — | — | Form 4 ↗ | ||
| BUFFETT WARREN E | BRK-B | Other G | March 17, 2026 | March 19, 2026 | 2d | 2 | — | — | derivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $733,300 | $733K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $733,100 | $733K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $732,500 | $733K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 2 | $366,000 | $732K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $731,350 | $731K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $730,707 | $731K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $730,700 | $731K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $730,145 | $730K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $729,000 | $729K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 2 | $363,765 | $728K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $727,453 | $727K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 2 | $363,593 | $727K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $726,995 | $727K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $726,408 | $726K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $726,079 | $726K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $726,000 | $726K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $725,995 | $726K | indirectderivative | Form 4 ↗ | |
| Abel Gregory E. | BRK-B | Option / conversion P | March 4, 2026 | March 5, 2026 | 1d | 1 | $725,210 | $725K | indirectderivative | Form 4 ↗ | |
| BUFFETT WARREN E | BRK-B | Exchange C | November 10, 2025 | November 12, 2025 | 2d | 1,800 | — | — | derivative | Form 4 ↗ | |
| BUFFETT WARREN E | BRK-B | Other G | November 10, 2025 | November 12, 2025 | 2d | 400,000 | — | — | Form 4 ↗ | ||
| BUFFETT WARREN E | BRK-B | Other G | November 10, 2025 | November 12, 2025 | 2d | 400,000 | — | — | Form 4 ↗ | ||
| BUFFETT WARREN E | BRK-B | Other G | November 10, 2025 | November 12, 2025 | 2d | 400,000 | — | — | Form 4 ↗ | ||
| BUFFETT WARREN E | BRK-B | Other G | November 10, 2025 | November 12, 2025 | 2d | 1,500,000 | — | — | Form 4 ↗ | ||
| BUFFETT WARREN E | BRK-B | Exchange C | November 10, 2025 | November 12, 2025 | 2d | 2,700,000 | — | — | Form 4 ↗ | ||
| GUYMAN CHARLOTTE | BRK-B | Exchange C | November 3, 2025 | November 5, 2025 | 2d | 1 | — | — | derivative | Form 4 ↗ | |
| GUYMAN CHARLOTTE | BRK-B | Other G | November 3, 2025 | November 5, 2025 | 2d | 410 | — | — | Form 4 ↗ | ||
| GUYMAN CHARLOTTE | BRK-B | Exchange C | November 3, 2025 | November 5, 2025 | 2d | 1,500 | — | — | Form 4 ↗ | ||
| Jain Ajit | BRK-B | Other G | October 22, 2025 | October 24, 2025 | 2d | 32 | — | — | Form 4 ↗ |
Federal contracts (USAspending, awards started in the last 180 days)
No contract award starting in the last 180 days was found for a recipient named exactly "BERKSHIRE HATHAWAY INC". Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
No LDA filing posted since October 2025 names "BERKSHIRE HATHAWAY INC" as the client. Filings under a subsidiary or trade-association name are not matched — search lobbying.
Related companies
Companies whose stock was traded by the same people who traded BRK-B, by number of filers in common. It shows overlap in public filings and nothing else.
- MICROSOFT CORP MSFT 10 filers in common
- Apple Inc. AAPL 8 filers in common
- UNITEDHEALTH GROUP INC UNH 8 filers in common
- AMAZON COM INC AMZN 7 filers in common
- Meta Platforms, Inc. META 6 filers in common
- CHEVRON CORP CVX 6 filers in common
- CISCO SYSTEMS, INC. CSCO 6 filers in common
- Merck & Co., Inc. MRK 6 filers in common
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 20 | 27 | October 5, 2025 | October 14, 2026 | House Clerk search |
| Senate eFD, periodic transaction reports | 7 | 10 | October 27, 2025 | July 21, 2026 | Senate eFD search |
| SEC EDGAR, Form 4 | 17 | 53 | October 24, 2025 | October 23, 2026 | Form 4 list on EDGAR |
Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insiders and their transactions come from SEC EDGAR Form 4 filings for this issuer. Contracts and lobbying are matched by exact normalized name (suffixes like Inc./Corp. ignored) to USAspending recipients and LDA clients — a conservative match that misses subsidiaries on purpose. See methodology and corrections.
Not investment advice. Public records shown as filed; no recommendation is made or implied.