Comparable stake leader
VANGUARD CAPITAL MANAGEMENT LLC
SEC ownership of Arthur J. Gallagher & Co.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000354190.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
30 Jun 2026
- Public ticker
- AJG on NYSE
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
VANGUARD CAPITAL MANAGEMENT LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
VANGUARD CAPITAL MANAGEMENT LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000354190
- Issuer location
- Rolling Meadows, IL
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Arthur J. Gallagher & Co. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
VANGUARD CAPITAL MANAGEME...
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
30 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 7.5%
13D/G row: VANGUARD CAPITAL MANAGEMENT LLC
Showing 1-8 of 50 holder rows.
Quick read
VANGUARD CAPITAL MANAGEMENT LLC leads the comparable SEC ownership view at 7.5%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens VANGUARD CAPITAL MANAGEMENT LLC's linked filing trail.
Comparable ownership
Top 5
VANGUARD CAPITAL MANAGEMENT LLC
7.5%
FMR LLC
7.2%
BlackRock, Inc.
6.9%
JPMORGAN CHASE & CO
5.5%
Capital World Investors
5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
7.5%
|
$4,167,833,033
19,243,850 shares
|
$0 | 31 Mar 2026 |
| FMR LLC |
13D/G
13F
Company
|
7.2%
|
$4,458,529,809
18,602,786 shares
|
$0 | 30 Jun 2026 |
| BlackRock, Inc. |
13D/G
13F
Company
|
6.9%
|
$5,674,337,959
17,725,659 shares
|
$0 | 30 Jun 2025 |
| JPMORGAN CHASE & CO |
13F
13D/G
Company
|
5.5%
from 13D/G
|
$3,260,708,906
14,356,764 shares
|
— | 30 Jun 2026 |
| Capital World Investors |
13D/G
13F
Company
|
5%
|
$3,060,525,263
12,769,747 shares
|
-$43,630,246 | 30 Jun 2026 |
| David S. Johnson |
3/4/5
Director
|
0.02%
|
$10,262,979
47,387 shares
|
— | 01 Jun 2026 |
| Norman L. Rosenthal |
3/4/5
Director
|
0.02%
|
$9,383,688
43,327 shares
|
— | 12 May 2026 |
| Ralph J. Nicoletti |
3/4/5
Director
|
0.01%
|
$3,988,170
18,414 shares
|
— | 12 May 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$27,470,762.
Buys
$988,488
Insiders: 1
Sells
$28,459,250
Insiders: 6
Net
-$27,470,762
Shares: -107,850
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 4,000
Shares: 111,850
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 27,500 | $0 | $7,310,156 | -$7,310,156 |
| 3-6 | 0 | 3,000 | $0 | $618,000 | -$618,000 |
| 6-9 | 0 | 60,100 | $0 | $14,459,735 | -$14,459,735 |
| 9-12 | 4,000 | 21,250 | $988,488 | $6,071,360 | -$5,082,872 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 25 reporting-owner rows connected to Arthur J. Gallagher & Co.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
25
Largest Forms 3/4/5 holder
J. Patrick Gallagher Jr.
Net 12M change
-$27,470,762
Latest report
08 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| J. Patrick Gallagher Jr. | CEO, Director | $288,442,182 | -$6,322,064 | -2.1% | Mixed | 08 Sep 2026 |
| Thomas Joseph Gallagher | President | $155,463,170 | Mixed | 01 Jul 2026 | ||
| Patrick Murphy Gallagher | Chief Operating Officer | $68,527,191 | Mixed | 08 Sep 2026 | ||
| Douglas K. Howell | VP & Chief Financial Officer | $65,603,970 | -$5,482,177 | -7.7% | Mixed | 22 Jun 2026 |
| Joel D. Cavaness | Vice President | $65,502,786 | Mixed | 29 Apr 2024 | ||
| William F. Ziebell | Vice President | $30,937,295 | Mixed | 31 Mar 2026 | ||
| Susan E. Pietrucha | Chief Human Resources Officer | $30,874,319 | Mixed | 15 Mar 2026 | ||
| Scott R. Hudson | Vice President | $29,026,476 | -$4,034,362 | -12% | Mixed | 02 Sep 2026 |
| Vishal Jain | Vice President | $27,699,450 | Mixed | 01 Jul 2026 | ||
| Michael Robert Pesch | Vice President | $26,013,819 | +$988,488 | +3.9% | Mixed | 01 Jul 2026 |
| Walter D. Bay | General Counsel | $24,044,658 | -$7,282,722 | -23% | Mixed | 24 Aug 2026 |
| Christopher E. Mead | Vice President | $14,238,395 | -$3,153,925 | -18% | Mixed | 19 Aug 2026 |
| William L. Bax | Director | $11,426,975 | Mixed | 07 May 2024 | ||
| Richard C. Cary | Controller, CAO | $10,401,939 | -$2,184,000 | -17% | Mixed | 02 Jun 2026 |
| David S. Johnson | Director | $10,262,979 | Mixed | 01 Jun 2026 | ||
| Norman L. Rosenthal | Director | $9,383,688 | Mixed | 12 May 2026 | ||
| Kay W. McCurdy | Director | $6,938,412 | Mixed | 09 May 2023 | ||
| Sherry S. Barrat | Director | $5,618,036 | Mixed | 13 May 2025 | ||
| Ralph J. Nicoletti | Director | $3,988,170 | Mixed | 12 May 2026 | ||
| Mark H. Bloom | Vice President | $3,870,212 | Mixed | 16 Aug 2026 |
Recent insider transactions for Arthur J. Gallagher & Co.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Patrick Murphy Gallagher | AJG | Common Stock | Gift | 51% | 49,988 | 148,093 | 08 Sep 2026 | By Trust | ||
| J. Patrick Gallagher Jr. | AJG | Common Stock | Gift | -100% | -49,988 | 0 | 08 Sep 2026 | By Corporation | ||
| Scott R. Hudson | AJG | Common Stock | Sale | -11.7% | $3,169,596 | $264.13 | -12,000 | 90,262 | 02 Sep 2026 | Direct |
| Scott R. Hudson | AJG | Common Stock | Options Exercise | 13.3% | 12,000 | 102,262 | 02 Sep 2026 | Direct | ||
| Scott R. Hudson | AJG | Non-qualified Stock Option | Options Exercise | -49.2% | -12,000 | 12,370 | 02 Sep 2026 | Direct | ||
| Christopher C. Miskel | AJG | Common Stock | Award | 1.43% | 153 | 10,826 | 01 Sep 2026 | Direct | ||
| Walter D. Bay | AJG | Common Stock | Sale | -14.4% | $3,240,972 | $270.08 | -12,000 | 71,292 | 24 Aug 2026 | Direct |
| Christopher E. Mead | AJG | Common Stock | Sale | -13.6% | $899,588 | $257.02 | -3,500 | 22,223 | 19 Aug 2026 | Direct |
| Christopher E. Mead | AJG | Common Stock | Options Exercise | 15.8% | 3,500 | 25,723 | 19 Aug 2026 | Direct | ||
| Christopher E. Mead | AJG | Non-qualified Stock Option | Options Exercise | -31.6% | -3,500 | 7,590 | 19 Aug 2026 | Direct | ||
| Mark H. Bloom | AJG | Common Stock | Tax liability | -12.1% | -607 | 4,417 | 16 Aug 2026 | Direct | ||
| Mark H. Bloom | AJG | Common Stock | Options Exercise | 34.2% | 1,280 | 5,023 | 16 Aug 2026 | Direct | ||
| Mark H. Bloom | AJG | Phantom Stock | Options Exercise | -17.6% | -1,280 | 6,017 | 16 Aug 2026 | Direct | ||
| Patrick Murphy Gallagher | AJG | Common Stock | Gift | -30.9% | -23,800 | 53,262 | 05 Aug 2026 | By Spouse's Trust | ||
| Vishal Jain | AJG | Common Stock | Options Exercise | 3.24% | 2,163 | 68,903 | 01 Jul 2026 | Direct | ||
| Vishal Jain | AJG | Notional Stock Units | Options Exercise | -18.2% | -2,163 | 9,726 | 01 Jul 2026 | Direct | ||
| Thomas Joseph Gallagher | AJG | Common Stock | Options Exercise | 0.11% | 352 | 323,743 | 01 Jul 2026 | Direct | ||
| Thomas Joseph Gallagher | AJG | Notional Stock Units | Options Exercise | -2.57% | -352 | 13,346 | 01 Jul 2026 | Direct | ||
| Michael Robert Pesch | AJG | Common Stock | Options Exercise | 0.8% | 356 | 44,833 | 01 Jul 2026 | Direct | ||
| Michael Robert Pesch | AJG | Notional Stock Units | Options Exercise | -5.48% | -356 | 6,135 | 01 Jul 2026 | Direct | ||
| Douglas K. Howell | AJG | Notional Stock Units | Discretionary transaction in accordance with Rule 16b-3(f) resulting in acquisition or disposition of issuer securities | -6.51% | -12,954 | 185,954 | 22 Jun 2026 | Direct | ||
| Richard C. Cary | AJG | Common Stock | Sale | -5.9% | $618,000 | $206.00 | -3,000 | 47,819 | 02 Jun 2026 | Direct |
| David S. Johnson | AJG | Common Stock | Award | 0.5% | 237 | 47,387 | 01 Jun 2026 | Direct | ||
| Christopher C. Miskel | AJG | Common Stock | Award | 1.86% | 194 | 10,642 | 01 Jun 2026 | Direct | ||
| Patrick Murphy Gallagher | AJG | Common Stock | Gift | 17.6% | 14,698 | 98,105 | 26 May 2026 | By Trust | ||
| J. Patrick Gallagher Jr. | AJG | Common Stock | Gift | -11.8% | -14,698 | 109,417 | 26 May 2026 | Direct | ||
| Deborah H. Caplan | AJG | Common Stock | Award | 72.1% | 1,110 | 2,650 | 12 May 2026 | Direct | ||
| Teresa Hillary Clarke | AJG | Common Stock | Award | 24.9% | 1,110 | 5,567 | 12 May 2026 | Direct | ||
| David John Coldman | AJG | Common Stock | Award | 7.29% | 1,110 | 16,344 | 12 May 2026 | Direct | ||
| Richard de Winton Wilkin Harries | AJG | Common Stock | Award | 85.2% | 1,110 | 2,413 | 12 May 2026 | Direct | ||
| David S. Johnson | AJG | Common Stock | Award | 2.41% | 1,110 | 47,150 | 12 May 2026 | Direct | ||
| Christopher C. Miskel | AJG | Common Stock | Award | 11.9% | 1,110 | 10,448 | 12 May 2026 | Direct | ||
| Ralph J. Nicoletti | AJG | Common Stock | Award | 6.41% | 1,110 | 18,414 | 12 May 2026 | Direct | ||
| Norman L. Rosenthal | AJG | Common Stock | Award | 2.63% | 1,110 | 43,327 | 12 May 2026 | Direct | ||
| Thomas Joseph Gallagher | AJG | Common Stock | Tax liability | -0.02% | -76.38 | 323,391 | 31 Mar 2026 | Direct | ||
| Thomas Joseph Gallagher | AJG | Common Stock | Options Exercise | 0.02% | 76.38 | 323,467 | 31 Mar 2026 | Direct | ||
| Thomas Joseph Gallagher | AJG | Phantom Stock | Options Exercise | -0.38% | -76.38 | 20,214 | 31 Mar 2026 | Direct | ||
| Douglas K. Howell | AJG | Common Stock | Tax liability | -0.07% | -76.38 | 106,710 | 31 Mar 2026 | Direct | ||
| Douglas K. Howell | AJG | Common Stock | Options Exercise | 0.07% | 76.38 | 106,786 | 31 Mar 2026 | Direct | ||
| Douglas K. Howell | AJG | Phantom Stock | Options Exercise | -1.1% | -76.38 | 6,867 | 31 Mar 2026 | Direct | ||
| Scott R. Hudson | AJG | Common Stock | Tax liability | -0.07% | -63.65 | 90,262 | 31 Mar 2026 | Direct | ||
| Scott R. Hudson | AJG | Common Stock | Options Exercise | 0.07% | 63.65 | 90,326 | 31 Mar 2026 | Direct | ||
| Scott R. Hudson | AJG | Phantom Stock | Options Exercise | -1.69% | -63.65 | 3,706 | 31 Mar 2026 | Direct | ||
| Vishal Jain | AJG | Common Stock | Tax liability | -0.08% | -50.92 | 66,741 | 31 Mar 2026 | Direct | ||
| Vishal Jain | AJG | Common Stock | Options Exercise | 0.08% | 50.92 | 66,792 | 31 Mar 2026 | Direct | ||
| Vishal Jain | AJG | Phantom Stock | Options Exercise | -0.13% | -50.92 | 39,580 | 31 Mar 2026 | Direct | ||
| William F. Ziebell | AJG | Common Stock | Tax liability | -0.1% | -50.92 | 48,685 | 31 Mar 2026 | Direct | ||
| William F. Ziebell | AJG | Common Stock | Options Exercise | 0.1% | 50.92 | 48,736 | 31 Mar 2026 | Direct | ||
| William F. Ziebell | AJG | Phantom Stock | Options Exercise | -0.07% | -50.92 | 68,390 | 31 Mar 2026 | Direct | ||
| Walter D. Bay | AJG | Common Stock | Tax liability | -0.75% | -627 | 83,292 | 31 Mar 2026 | Direct |
* marks a reported price that did not pass the local price check.