Arthur J. Gallagher's top three insider shareholders as of September 29, 2026 are J Patrick Jr Gallagher (Ceo, 490.13K shares), Thomas Joseph Gallagher (President, 323.74K shares), Patrick Murphy Gallagher (Chief Operating Officer, 201.36K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Thomas Joseph Gallagher | President | 323,743 | 0 | 323,743 | 20.5% | 06 Jul, 2026 |
| 2 | Patrick Murphy Gallagher | Chief Operating Officer | 0 | 201,355 | 201,355 | 12.8% | 10 Sep, 2026 |
| 3 | Joel D Cavaness | Vice President | 159,581 | 700 | 160,281 | 10.2% | 01 May, 2024 |
| 4 | J Patrick Jr Gallagher | Ceo | 109,417 | 0 | 109,417 | 6.9% | 27 May, 2026 |
| 5 | Douglas K Howell | Vp Chief Financial Officer | 106,710 | 0 | 106,710 | 6.8% | 02 Apr, 2026 |
| 6 | Scott R Hudson | Vice President | 90,262 | 0 | 90,262 | 5.7% | 04 Sep, 2026 |
| 7 | Vishal Jain | Vice President | 75,117 | 0 | 75,117 | 4.8% | 06 Jul, 2026 |
| 8 | Walter D. Bay | General Counsel | 71,292 | 0 | 71,292 | 4.5% | 26 Aug, 2026 |
| 9 | William F Ziebell | Vice President | 48,685 | 0 | 48,685 | 3.1% | 02 Apr, 2026 |
| 10 | Michael Robert Pesch | Vice President | 48,482 | 0 | 48,482 | 3.1% | 06 Jul, 2026 |
| 11 | Richard C Cary | Controller, Cao | 48,458 | 0 | 48,458 | 3.1% | 17 Sep, 2026 |
| 12 | David S Johnson | Director | 48,237 | 0 | 48,237 | 3.1% | 02 Jun, 2026 |
| 13 | William L Bax | Director | 47,904 | 0 | 47,904 | 3.0% | 09 May, 2024 |
| 14 | Norman L Rosenthal | Director | 44,177 | 0 | 44,177 | 2.8% | 13 May, 2026 |
| 15 | Kay W Mccurdy | Director | 30,621 | 0 | 30,621 | 1.9% | 11 May, 2023 |
| 16 | Christopher E Mead | Vice President | 22,223 | 0 | 22,223 | 1.4% | 20 Aug, 2026 |
| 17 | Ralph J Nicoletti | Director | 19,264 | 0 | 19,264 | 1.2% | 13 May, 2026 |
| 18 | Sherry S Barrat | Director | 18,923 | 0 | 18,923 | 1.2% | 15 May, 2025 |
| 19 | David John Coldman | Director | 17,194 | 0 | 17,194 | 1.1% | 13 May, 2026 |
| 20 | Susan E Pietrucha | Chief Human Resources Officer | 16,397 | 0 | 16,397 | 1.0% | 17 Mar, 2026 |
| 21 | Christopher C. Miskel | Director | 11,677 | 0 | 11,677 | 0.7% | 02 Sep, 2026 |
| 22 | Teresa Hillary Clarke | Director | 6,417 | 0 | 6,417 | 0.4% | 13 May, 2026 |
| 23 | Mark H. Bloom | Vice President | 4,417 | 0 | 4,417 | 0.3% | 18 Aug, 2026 |
| 24 | Deborah H Caplan | Director | 3,500 | 0 | 3,500 | 0.2% | 13 May, 2026 |
| 25 | Richard De Winton Wilkin Harries | Director | 3,082 | 0 | 3,082 | 0.2% | 13 May, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 15 Sep, 2026 | Richard C Cary | Controller, Cao | Disposed S | 1,000 | $252.86 | $252.86K | 46,819 | Direct |
| 08 Sep, 2026 | Patrick Murphy Gallagher | Chief Operating Officer | Acquired G | 49,988 | $0.00 | $0 | 148,093 | Indirect |
| 08 Sep, 2026 | J Patrick Jr Gallagher | Ceo | Disposed G | 49,988 | $0.00 | $0 | 0 | Indirect |
| 02 Sep, 2026 | Scott R Hudson | Vice President | Acquired M | 12,000 | $86.17 | $1.03Mn | 102,262 | Direct |
| 02 Sep, 2026 | Scott R Hudson | Vice President | Disposed S | 12,000 | $264.13 | $3.17Mn | 90,262 | Direct |
| 02 Sep, 2026 | Scott R Hudson | Vice President | Disposed M | 12,000 | $0.00 | $0 | 12,370 | Direct |
| 01 Sep, 2026 | Christopher C. Miskel | Director | Acquired A | 153 | $262.00 | $40.00K | 10,826 | Direct |
| 24 Aug, 2026 | Walter D. Bay | General Counsel | Disposed S | 12,000 | $270.08 | $3.24Mn | 71,292 | Direct |
| 19 Aug, 2026 | Christopher E Mead | Vice President | Acquired M | 3,500 | $86.17 | $301.60K | 25,723 | Direct |
| 19 Aug, 2026 | Christopher E Mead | Vice President | Disposed S | 3,500 | $257.03 | $899.59K | 22,223 | Direct |
| 19 Aug, 2026 | Christopher E Mead | Vice President | Disposed M | 3,500 | $0.00 | $0 | 7,590 | Direct |
| 16 Aug, 2026 | Mark H. Bloom | Vice President | Acquired M | 1,280 | $0.00 | $0 | 5,023 | Direct |
| 16 Aug, 2026 | Mark H. Bloom | Vice President | Disposed F | 607 | $251.21 | $152.44K | 4,417 | Direct |
| 16 Aug, 2026 | Mark H. Bloom | Vice President | Disposed M | 1,280 | $0.00 | $0 | 6,017 | Direct |
| 05 Aug, 2026 | Patrick Murphy Gallagher | Chief Operating Officer | Disposed G | 23,800 | $0.00 | $0 | 53,262 | Indirect |
| 01 Jul, 2026 | Vishal Jain | Vice President | Acquired M | 2,163 | $229.57 | $496.49K | 68,903 | Direct |
| 01 Jul, 2026 | Thomas Joseph Gallagher | President | Acquired M | 352 | $229.57 | $80.80K | 323,743 | Direct |
| 01 Jul, 2026 | Michael Robert Pesch | Vice President | Acquired M | 356 | $229.57 | $81.68K | 44,833 | Direct |
| 01 Jul, 2026 | Vishal Jain | Vice President | Disposed M | 2,163 | $0.00 | $0 | 9,726 | Direct |
| 01 Jul, 2026 | Michael Robert Pesch | Vice President | Disposed M | 356 | $0.00 | $0 | 6,135 | Direct |