| $705M | ||
| $248M | ||
| $183M | ||
| $119M | ||
| $57M | ||
| $26M |
Buys | $1,007,272 | 2 | 11 |
Sells | $39,082,277 | 17 | 89 |
| Pesch Michael Robert | President | 2 | $1.01M | 0 | $0 | $1.01M |
| JOHNSON DAVID S | director | 0 | $0 | 1 | $342,038 | $-342,038 |
| Mead Christopher E | VICE PRESIDENT | 0 | $0 | 3 | $2.25M | $-2.25M |
| Bay Walter D. | General Counsel | 0 | $0 | 1 | $4.04M | $-4.04M |
| Pietrucha Susan E | Chief Human Resources Officer | 0 | $0 | 1 | $4.65M | $-4.65M |
| GALLAGHER J PATRICK JR | CEO | 0 | $0 | 1 | $6.32M | $-6.32M |
| HOWELL DOUGLAS K | VP & Chief Financial Officer | 0 | $0 | 4 | $6.38M | $-6.38M |
| CARY RICHARD C | Controller, CAO | 0 | $0 | 3 | $6.86M | $-6.86M |
| Hudson Scott R | Vice President | 0 | $0 | 3 | $8.23M | $-8.23M |
Arthur J. Gallagher & Co., together with its subsidiaries, provides insurance brokerage, consulting, third-party claims settlement, and administration services in the United States, Australia, Bermuda, Canada, the Caribbean, New Zealand, India, and the United Kingdom. It operates through Brokerage and Risk Management segments. The Brokerage segment consists of retail and wholesale insurance brokerage operations; assists retail brokers and other non-affiliated brokers in the placement of specialized and hard-to-place insurance; acts as a brokerage wholesaler, managing general agent, and managing general underwriter for distributing specialized insurance coverage's to underwriting enterprises. This segment also performs activities, including marketing, underwriting, issuing policies, collecting premiums, appointing and supervising other agents, paying claims, and negotiating reinsurance; and offers brokerage and consulting services to businesses and organizations, including commercial, not-for-profit, and public entities, as well as individuals in the areas of insurance placement, risk of loss management, and management of employer sponsored benefit programs. The Risk Management segment provides contract claim settlement and administration services to enterprises and public entities; and claims management, loss control consulting, and insurance property appraisal services. The company offers its services through a network of correspondent insurance brokers and consultants. It serves commercial, industrial, public, religious, and not-for-profit entities. The company was incorporated in 1927 and is headquartered in Rolling Meadows, Illinois.
Over the last 12 months, insiders at Arthur J. Gallagher & Co. have bought $1.01M and sold $39.08M worth of Arthur J. Gallagher & Co. stock.
On average, over the past 5 years, insiders at Arthur J. Gallagher & Co. have bought $662,043 and sold $48.47M worth of stock each year.
Highest buying activity among insiders over the last 12 months: Pesch Michael Robert (President) — $1.01M.
The last purchase of 4,000 shares for transaction amount of $988,488 was made by Pesch Michael Robert (Vice President) on 2025‑11‑03.
| 2026-03-06 | Sale | Hudson Scott R | Vice President | 3,800 0.0015% | $227.57 | $864,766 | -4.42% | |
| 2026-03-05 | Sale | Mead Christopher E | VICE PRESIDENT | 4,000 0.0015% | $227.12 | $908,472 | -4.77% | |
| 2026-03-02 | Sale | GALLAGHER J PATRICK JR | CEO | 27,450 0.0108% | $230.31 | $6.32M | -5.42% | |
| 2025-12-23 | Sale | Mead Christopher E | VICE PRESIDENT | 4,000 0.0016% | $258.11 | $1.03M | -13.95% | |
| 2025-12-22 | Sale | HOWELL DOUGLAS K | VP & Chief Financial Officer | 5,000 0.0019% | $258.05 | $1.29M | -13.69% | |
| 2025-12-19 | Sale | Bay Walter D. | General Counsel | 15,850 0.0062% | $255.00 | $4.04M | -11.85% | |
| 2025-11-21 | Sale | Mead Christopher E | VICE PRESIDENT | 1,250 0.0005% | $250.74 | $313,425 | -4.40% | |
| 2025-11-18 | Sale | CARY RICHARD C | Controller, CAO | 6,000 0.0024% | $261.00 | $1.57M | -6.89% | |
| 2025-11-03 | Pesch Michael Robert | Vice President | 4,000 0.0015% | $247.12 | $988,488 | +0.51% | ||
| 2025-09-22 | Sale | HOWELL DOUGLAS K | VP & Chief Financial Officer | 8,000 0.0031% | $299.54 | $2.4M | -17.11% | |
| 2025-09-19 | Sale | HOWELL DOUGLAS K | VP & Chief Financial Officer | 6,000 0.0023% | $299.27 | $1.8M | -16.87% | |
| 2025-09-09 | Sale | HOWELL DOUGLAS K | VP & Chief Financial Officer | 3,000 0.0012% | $299.78 | $899,334 | -16.17% | |
| 2025-09-08 | Sale | Hudson Scott R | Vice President | 12,855 0.005% | $297.60 | $3.83M | -16.34% | |
| 2025-08-21 | Sale | CARY RICHARD C | Controller, CAO | 4,000 0.0016% | $306.00 | $1.22M | -17.42% | |
| 2025-06-18 | Pesch Michael Robert | President | 59 <0.0001% | $318.37 | $18,784 | -18.02% | ||
| 2025-05-21 | Sale | Hudson Scott R | Vice President | 10,500 0.0041% | $337.17 | $3.54M | -21.48% | |
| 2025-05-19 | Sale | Pietrucha Susan E | Chief Human Resources Officer | 13,500 0.0053% | $344.13 | $4.65M | -22.53% | |
| 2025-05-16 | Sale | JOHNSON DAVID S | director | 1,000 0.0004% | $342.04 | $342,038 | -22.17% | |
| 2025-05-07 | Sale | CARY RICHARD C | Controller, CAO | 12,000 0.0047% | $339.51 | $4.07M | -17.49% | |
| 2025-03-21 | Sale | Hudson Scott R | Vice President | 7,510 0.003% | $333.59 | $2.51M | -10.97% |
| GALLAGHER J PATRICK JR | CEO | 96455 0.0375% | $21.38M | 2 | 14 | +9.44% |
| HOWELL DOUGLAS K | VP & Chief Financial Officer | 95777 0.0373% | $21.23M | 2 | 47 | +14.72% |
| Hudson Scott R | Vice President | 85920 0.0334% | $19.04M | 0 | 19 | |
| Bay Walter D. | General Counsel | 79549 0.0309% | $17.63M | 0 | 27 | |
| CARY RICHARD C | Controller, CAO | 50668 0.0197% | $11.23M | 0 | 23 | |
| JOHNSON DAVID S | director | 45323 0.0176% | $10.04M | 1 | 23 | <0.0001% |
| Pesch Michael Robert | Vice President | 41849 0.0163% | $9.27M | 2 | 1 | |
| Mead Christopher E | VICE PRESIDENT | 19306 0.0075% | $4.28M | 0 | 8 | |
| Pietrucha Susan E | Chief Human Resources Officer | 11941 0.0046% | $2.65M | 0 | 26 | |
| GALLAGHER THOMAS JOSEPH | President | 329099 0.128% | $72.93M | 1 | 7 | +20.32% |
| DURKIN JAMES W JR | Vice President | 303317 0.118% | $67.22M | 0 | 13 | |
| BRANIFF JAMES J III | Vice President | 157056 0.0611% | $34.81M | 0 | 3 | |
| GAULT JAMES S | Vice President | 109416 0.0426% | $24.25M | 0 | 13 | |
| BAX WILLIAM L | director | 45405 0.0177% | $10.06M | 4 | 4 | +23.7% |
| Gallagher Patrick Murphy | Chief Operating Officer | 42945 0.0167% | $9.52M | 1 | 3 | +8.65% |
| Ziebell William F | VICE PRESIDENT | 40033 0.0156% | $8.87M | 0 | 8 | |
| HAND ELBERT O | director | 30800 0.012% | $6.83M | 1 | 7 | +18.86% |
| McCurdy Kay W | director | 29591 0.0115% | $6.56M | 2 | 14 | +3.98% |
| ROSENTHAL NORMAN L | director | 24675 0.0096% | $5.47M | 0 | 3 | |
| ROSENGREN JOHN C | VP, Gen. Counsel & Secretary | 24363 0.0095% | $5.4M | 0 | 2 | |
| GORDON ILENE S | director | 21745 0.0085% | $4.82M | 0 | 7 | |
| BRINKERHOFF ELIZABETH | Vice President | 20996 0.0082% | $4.65M | 0 | 6 | |
| WIMMER JAMES R | director | 20160 0.0078% | $4.47M | 0 | 18 | |
| BARRAT SHERRY S | director | 16533 0.0064% | $3.66M | 1 | 4 | +5.41% |
| MCGURN DAVID E JR | Vice President | 15466 0.006% | $3.43M | 0 | 12 | |
| MCKENNA RICHARD J | Vice President | 13732 0.0053% | $3.04M | 0 | 12 | |
| English Frank E. Jr. | director | 5500 0.0021% | $1.22M | 2 | 17 | +15.26% |
| ELSBERG NICHOLAS M | Vice President | 5000 0.0019% | $1.11M | 0 | 3 | |
| Cavaness Joel D | Vice President | 2023 0.0008% | $448,235.03 | 0 | 11 | |
| HENGESBAUGH BERNARD L | director | 1000 0.0004% | $221,610.00 | 1 | 0 | <0.0001% |
$33,078 | 2 | 11.95% | $282.24M |
| Increased Positions | 554 | +32.23% | 20M | +8.81% |
| Decreased Positions | 765 | -44.5% | 16M | -6.95% |
| New Positions | 152 | New | 5M | New |
| Sold Out Positions | 179 | Sold Out | 990,892 | Sold Out |
| Total Postitions | 1,508 | -12.27% | 234M | +1.86% |
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| Blackrock, Inc. | $4.75M | 7.22% | 18.56M | -419,087 | -2.21% | 2025-09-30 |
| Fmr Llc | $3.21M | 4.88% | 12.53M | -530,592 | -4.06% | 2025-09-30 |
| Capital World Investors | $3.02M | 4.59% | 11.78M | +101,298 | +0.87% | 2025-09-30 |
| State Street Corp | $2.79M | 4.24% | 10.89M | +147,587 | +1.37% | 2025-09-30 |
| Morgan Stanley | $2.2M | 3.34% | 8.59M | +1M | +21.05% | 2025-09-30 |
| Capital International Investors | $1.84M | 2.8% | 7.19M | +45,256 | +0.63% | 2025-09-30 |
| Geode Capital Management, Llc | $1.54M | 2.34% | 6M | +90,546 | +1.53% | 2025-09-30 |
| Norges Bank | $1.23M | 1.87% | 4.8M | -209,329 | -4.18% | 2025-06-30 |