Berkshire Hathaway (BRK.B)See Remarks bought ~$205K

~$205K

Approx. value · 400 sh @ $512.52

1,108

Holds after · shares reported

Traded

Aug 12, 2026

Filed

Aug 13, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Mar 27, 2026CongressDisclosed purchase of BRK.B — reported range $50,001 - $100,000
2. May 27, 2026Congress · 1 personMembers of Congress: 4 purchases
3. Jun 23, 2026CongressDisclosed purchase of BRK.B — reported range $15,001 - $50,000
4. Jul 15, 20265% stakeWarren E. Buffett filed an activist stake (13D) of 38.2%
5. Jul 28, 2026Congress · 1 personMembers of Congress: 2 purchases
6. Jul 30, 2026CongressDisclosed purchase of BRK.B — reported range $1,001 - $15,000
7. Aug 3, 2026FDA · NHTSA campaign 26V503000Vehicle recall of 21 units: electrical system, wiring
8. Aug 7, 2026CongressDisclosed purchase of BRK.B — reported range $1,001 - $15,000
9. Aug 8, 2026Company filing · Form 8-K · ResultsReported its results
10. Aug 12, 2026 · this disclosureInsiderOfficer purchased ~$205K of BRK.B shares in the open market

What came next

1. Aug 12, 2026Federal contract · $5.7M obligatedDepartment of the Treasury awarded Berkshire Hathaway: $5.74M obligated to date
2. Aug 12, 2026Insider · 1 personInsiders: 2 purchases (~$45K)
3. Sep 1, 2026FDA · NHTSA campaign 26V563000Vehicle recall of 5 units: equipment, recreational vehicle/trailer, lpg systems
4. Sep 1, 2026FDA · NHTSA campaign 26V565000Vehicle recall of 55 units: equipment adaptive/mobility, wheelchair lift/ramp, controls/control wiring
5. Sep 10, 2026FDA · NHTSA campaign 26V585000Vehicle recall of 195 units: back over prevention, sensing system, camera
6. Sep 10, 2026FDA · NHTSA campaign 26V586000Vehicle recall of 60 units: equipment, appliance, oven/stove/cooktop
7. Sep 11, 2026FDA · NHTSA campaign 26V589000Vehicle recall of 155 units: electrical system, wiring
8. Sep 21, 2026FDA · NHTSA campaign 26V603000Vehicle recall of 16 units: fuel system, diesel, pre-heater
9. Sep 23, 2026FDA · NHTSA campaign 26V609000Vehicle recall of 111 units: structure, body, step/ladder
10. Sep 23, 2026FDA · NHTSA campaign 26V610000Vehicle recall of 41 units: equipment, recreational vehicle/trailer
11. Sep 23, 2026FDA · NHTSA campaign 26V608000Vehicle recall of 132 units: structure, body, door
12. Sep 24, 2026CongressDisclosed partial sale of BRK.B — reported range $1,001 - $15,000
13. Sep 28, 2026Insider · Their largest sale since 2018Chair sold ~$20M of BRK.B shares in the open market

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for Berkshire Hathaway

For Berkshire Hathaway, OQRO holds 4 insider filings (SEC Form 4 or Form 144), 7 Congress trade reports, 139 fund holdings reports (13F) and 1 federal contract award dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its BRK.B page.

Other recent filings by Michael J. O'sullivan, See Remarks

• SEC Form 4 at Berkshire Hathaway (BRK.B)Aug 13, 2026
• SEC Form 4 at Berkshire Hathaway (BRK.B)Aug 13, 2026
• SEC Form 4 at Berkshire Hathaway (BRK.B)May 6, 2026
• SEC Form 4 at Berkshire Hathaway (BRK.B)May 6, 2026
• SEC Form 4 at Snap (SNAP)Sep 18, 2025

The full history of Michael J. O'sullivan, See Remarks is on the profile page.

How this filing works

• SEC Form 4
• Open-market purchase
• Rule 10b5-1 trading plans

Other disclosures at Berkshire Hathaway

• House Clerk periodic transaction reportOct 7, 2026
• SEC Form 4Sep 29, 2026
• House Clerk periodic transaction reportSep 9, 2026
• SEC Form 13F-HRAug 26, 2026
• SEC Form 13F-HRAug 18, 2026
• SEC Form 13F-HRAug 17, 2026

Everything OQRO holds on this company is on its BRK.B page.