Who Owns Gallagher Arthur J & Co (AMDL)? -- Institutional Holders (2026-06-30)
45 institutions reported holding $576.9M of Gallagher Arthur J & Co (AMDL) in SEC 13F filings for 2026-06-30. Largest institutional holders: SUSQUEHANNA INTERNATIONAL GROUP, LLP ($230.3M), CITADEL ADVISORS LLC ($152.7M), UBS Group AG ($83.0M), JANE STREET GROUP, LLC ($46.4M), GOLDMAN SACHS GROUP INC ($15.7M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $230.3M | 2.8M | Added |
| 2 | CITADEL ADVISORS LLC | $152.7M | 1.8M | Added |
| 3 | UBS Group AG | $83.0M | 1.0M | Trimmed |
| 4 | JANE STREET GROUP, LLC | $46.4M | 560,600 | Trimmed |
| 5 | GOLDMAN SACHS GROUP INC | $15.7M | 190,146 | Trimmed |
| 6 | IMC-Chicago, LLC | $12.3M | 148,942 | Added |
| 7 | GROUP ONE TRADING LLC | $7.5M | 91,079 | Added |
| 8 | Belvedere Trading LLC | $3.5M | 42,500 | New |
| 9 | HighTower Advisors, LLC | $3.4M | 40,952 | Added |
| 10 | MORGAN STANLEY | $3.3M | 40,136 | Added |
| 11 | Fortis Capital Management LLC | $2.9M | 35,323 | Hold |
| 12 | RENAISSANCE TECHNOLOGIES LLC | $2.9M | 34,900 | New |
| 13 | HRT FINANCIAL LP | $2.7M | 32,471 | Trimmed |
| 14 | Avenir Tech Ltd | $1.5M | 18,395 | New |
| 15 | StoneX Group Inc. | $1.4M | 24,736 | Added |
| 16 | HUB Investment Partners, LLC | $1.3M | 15,300 | Trimmed |
| 17 | Client First Investment Management LLC | $1.1M | 13,258 | New |
| 18 | TWO SIGMA SECURITIES, LLC | $1.1M | 13,127 | New |
| 19 | Scientech Research LLC | $756,666 | 9,144 | New |
| 20 | HERITAGE OAK WEALTH ADVISORS LLC | $455,125 | 5,500 | New |
| 21 | Allworth Financial LP | $413,750 | 5,000 | Hold |
| 22 | VESTOR CAPITAL, LLC | $413,000 | 1,800 | Trimmed |
| 23 | Focus Partners Wealth | $372,375 | 4,500 | New |
| 24 | SBI Securities Co., Ltd. | $280,771 | 3,393 | Trimmed |
| 25 | CreativeOne Wealth, LLC | $248,912 | 3,008 | New |
Source: SEC Form 13F filings · as of 2026-06-30