Arthur J. Gallagher & Co. (AJG) Shareholders & Insider Trades
Arthur J. Gallagher & Co. shareholders at a glance
The largest holder of Arthur J. Gallagher & Co. stock is JPMorgan Investment Management, Inc., with 19.6 million shares (7.61% of the company), worth about $4.04 billion as of May 18, 2026. The 10 largest holders together own 53.4%.
In Q2 2026, 1,344 institutional holdings reports listed shares worth $55.10 billion.
Insiders reported 100 transactions in the last two years: 12 sales worth $33.34 million and 2 purchases. The newest one on file is from May 12, 2026 (Miskel Christopher C., Director).
Major holders as of May 18, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through May 12, 2026.
Arthur J. Gallagher & Co.
Shareholders Summary
2026Q2
Ownership by Type
Geographic Distribution
Largest Arthur J. Gallagher & Co. shareholders
| Holder | Shares | % of company | Value |
|---|---|---|---|
| JPMorgan Investment Management, Inc. | 19.6 million | 7.61% | $4.0B |
| Vanguard Capital Management LLC | 19.2 million | 7.49% | $4.0B |
| Vanguard Capital Management LLC | 16.7 million | 6.50% | $3.4B |
| BlackRock Advisors LLC | 15.1 million | 5.86% | $3.1B |
| Fidelity Management & Research Co. LLC | 14.6 million | 5.69% | $3.0B |
| Capital Research & Management Co. (World Investors) | 13.8 million | 5.37% | $2.9B |
| Vanguard Portfolio Management LLC | 12.4 million | 4.83% | $2.6B |
| State Street Corporation | 11.0 million | 4.27% | $2.3B |
| Norges Bank (13F) | 7.4 million | 2.89% | $1.5B |
| Dodge & Cox | 7.4 million | 2.86% | $1.5B |
As of May 18, 2026.
Arthur J. Gallagher & Co. institutional holdings by quarter
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 1,344 | – | $55.1B |
| Q1 2026 | 1,292 | 230.0 million | $49.7B |
| Q4 2025 | 1,349 | 239.0 million | $61.7B |
| Q3 2025 | 1,396 | 246.0 million | $76.1B |
| Q2 2025 | 1,439 | 229.0 million | $73.2B |
| Q1 2025 | 1,406 | 231.0 million | $79.5B |
| Q4 2024 | 1,376 | 233.0 million | $66.1B |
| Q3 2024 | 1,254 | 194.0 million | $55.0B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
Arthur J. Gallagher & Co. insider trades
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Miskel Christopher C. | May 12, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Clarke Teresa Hillary | May 12, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Harries Richard De Winton Wilkin | May 12, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Caplan Deborah H. | May 12, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Coldman David John | May 12, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Rosenthal Norman L | May 12, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Nicoletti Ralph J | May 12, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Johnson David S | May 12, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Bay Walter D | Mar 31, 2026 | General Counsel | -- | – |
| Cary Richard C | Mar 31, 2026 | Officer | -- | – |
| Howell Douglas K | Mar 31, 2026 | Chief Financial Officer | Conversion of Exercise of derivative security at price 215.95 per share. | $16,495 |
| Gallagher J Patrick Jr | Mar 31, 2026 | Chief Executive Officer | Conversion of Exercise of derivative security at price 215.95 per share. | $1.2M |
Newest 12 of 100 insider transactions in the last two years.
Questions and answers
Who owns the most Arthur J. Gallagher & Co. stock?
JPMorgan Investment Management, Inc., with 7.61% of the company (as of May 18, 2026). Next: Vanguard Capital Management LLC (7.49%) and Vanguard Capital Management LLC (6.50%).
How many institutions own Arthur J. Gallagher & Co. stock?
1,344 institutional holdings reports listed Arthur J. Gallagher & Co. shares in Q2 2026 worth $55.10 billion.
Are Arthur J. Gallagher & Co. insiders buying or selling the stock?
In the last two years insiders reported 12 sales and 2 purchases (100 transactions in all); the newest on file is from May 12, 2026.
