14 institutions reported holding $2.04B of BERKSHIRE HATHAWAY INC DEL (BRK.A) in SEC 13F filings for 2026-03-31. Largest institutional holders: IMC-Chicago, LLC ($1.14B), SIMPLEX TRADING, LLC ($292.5M), GROUP ONE TRADING LLC ($210.6M), JPMORGAN CHASE & CO ($186.4M), NATIONAL BANK OF CANADA /FI/ ($143.8M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $1.14B | 2.4M | Added |
| 2 | SIMPLEX TRADING, LLC | $292.5M | 610,300 | Trimmed |
| 3 | GROUP ONE TRADING LLC | $210.6M | 439,400 | Trimmed |
| 4 | JPMORGAN CHASE & CO | $186.4M | 392,700 | Added |
| 5 | NATIONAL BANK OF CANADA /FI/ | $143.8M | 3,000 | Added |
| 6 | Gladius Capital Management LP | $55.9M | 116,600 | Added |
| 7 | Maven Securities LTD | $17.0M | 35,500 | Trimmed |
| 8 | OSAIC HOLDINGS, INC. | $1.7M | 3,500 | New |
| 9 | SG Americas Securities, LLC | $394,000 | 34,000 | Trimmed |
| 10 | Miracle Mile Advisors, LLC | $286,942 | 600 | Hold |
| 11 | Mosaic Advisors LLC | $258,009 | 1,500 | Hold |
| 12 | All Terrain Financial Advisors, LLC | $47,920 | 100 | New |
| 13 | Kohmann Bosshard Financial Services, LLC | $0 | 0 | Exited |
| 14 | CIBC Bancorp USA Inc. | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31