BRK-B insider buying and SEC filings, explained
Berkshire Hathaway Inc. · CIK 1067983
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$501K
Insiders who bought
1
Sold (not marked 10b5-1)
$20.0M
Planned sales (10b5-1)
$0
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Sep 28, 2026 | Sale | Ajit Jain (Director and Vice Chairman) sold 39,700 shares indirectly (by entity) at $503.09 ($20.0M). Holdings by entity down 37% to 67,608 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 29, 2026 |
| Aug 12, 2026 | Purchase (code P) | Michael J. O'Sullivan (Officer) bought 488 shares indirectly (by trust) at about $512.44 ($250K), reported as a purchase (code P). Holdings by trust up 74% to 1,151 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 13, 2026 |
| Aug 12, 2026 | Other purchase | Charles C Chang (CFO) bought 2 Class A Common Stock indirectly (by entity) at about $765,187.06 ($1.5M), reported as a purchase (code P). Holdings by entity up 33% to 8 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 13, 2026 |
| May 6, 2026 | Purchase (code P) | Michael J. O'Sullivan (Officer) bought 536 shares indirectly (by trust) at about $467.44 ($251K), reported as a purchase (code P). Holdings by trust up 422% to 663 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 6, 2026 |
| Mar 4, 2026 | Other purchase | Gregory E. Abel (CEO and Director) bought 21 Class A Common Stock indirectly (by trust) at about $728,970.11 ($15.3M), reported as a purchase (code P). Holdings by trust up 9% to 249 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 5, 2026 |
11 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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