15 institutions reported holding $1.91B of BERKSHIRE HATHAWAY INC DEL (BRK.A) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($868.1M), GROUP ONE TRADING LLC ($265.9M), SIMPLEX TRADING, LLC ($241.7M), JPMORGAN CHASE & CO ($159.1M), NATIONAL BANK OF CANADA /FI/ ($157.8M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $868.1M | 1.7M | Trimmed |
| 2 | GROUP ONE TRADING LLC | $265.9M | 531,300 | Added |
| 3 | SIMPLEX TRADING, LLC | $241.7M | 483,000 | Trimmed |
| 4 | JPMORGAN CHASE & CO | $159.1M | 320,700 | Trimmed |
| 5 | NATIONAL BANK OF CANADA /FI/ | $157.8M | 3,153 | Added |
| 6 | DV Trading LLC | $150.1M | 300,000 | New |
| 7 | Maven Securities LTD | $64.3M | 128,800 | Added |
| 8 | SG Americas Securities, LLC | $1.9M | 125,300 | Added |
| 9 | All Terrain Financial Advisors, LLC | $1.1M | 2,100 | Added |
| 10 | Mosaic Advisors LLC | $397,425 | 2,100 | Added |
| 11 | Focus Partners Wealth | $300,234 | 600 | New |
| 12 | Miracle Mile Advisors, LLC | $300,002 | 0 | Hold |
| 13 | Brooklands Fund Management Ltd | $19,680 | 6 | New |
| 14 | OSAIC HOLDINGS, INC. | $0 | 0 | Exited |
| 15 | Gladius Capital Management LP | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30