Arthur J. Gallagher & Co.
Arthur J. Gallagher & Co. (AJG) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · AJG · as of Sep 30, 2025
Ownership Breakdown
1,372
Institutional Holders
▼ 44 vs Q2
$69.62B
Total Inst. Value
▼ $3.25B vs Q2
256.94M
Shares Outstanding
freeFloat 98.89%
225.18M
13F Shares Held
▼ 2.92M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
AJG largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC insurance agents, brokers & service | 31.17M | 12.16% | 12.16% | $9.66T | Nov 7, 2025 | ▲ 76.8K |
JPMORGAN CHASE & CO insurance agents, brokers & service | 20.34M | 7.94% | 7.94% | $6.30T | Nov 26, 2025 | ▲ 3.33M |
BLACKROCK, INC. insurance agents, brokers & service | 18.56M | 7.24% | 7.24% | $5.75T | Nov 12, 2025 | ▼ 419.1K |
FMR LLC insurance agents, brokers & service | 12.53M | 4.89% | 4.89% | $3.88T | Nov 13, 2025 | ▼ 530.6K |
CAPITAL WORLD INVESTORS insurance agents, brokers & service | 11.78M | 4.60% | 4.60% | $3.65T | Nov 13, 2025 | ▲ 101.3K |
STATE STREET CORP insurance agents, brokers & service | 10.89M | 4.25% | 4.25% | $3.37T | Nov 14, 2025 | ▲ 147.6K |
MORGAN STANLEY insurance agents, brokers & service | 8.59M | 3.35% | 3.35% | $2.66T | May 27, 2026 | ▲ 1.49M |
CAPITAL INTERNATIONAL INVESTORS insurance agents, brokers & service | 7.19M | 2.81% | 2.81% | $2.23T | Nov 13, 2025 | ▲ 45.3K |
GEODE CAPITAL MANAGEMENT, LLC insurance agents, brokers & service | 6.00M | 2.34% | 2.34% | $1.85T | Nov 12, 2025 | ▲ 90.5K |
WELLINGTON MANAGEMENT GROUP LLP insurance agents, brokers & service | 3.27M | 1.28% | 1.28% | $1.01T | Nov 14, 2025 | ▲ 395.3K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
26
Increased
+10.86M shares0
New Positions
first time holders24
Decreased
−4.10M shares0
Sold Out
fully exitedNet shares change (top 50)
+6.76M
+10.86M / −4.10M
Net new holders
+2
0 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
AJG insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
11
Buy transactions
2
Sell transactions
5.50
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
CARY RICHARD C Controller, CAO | Jun 2, 2026 | Sale | 3,000 | $206.00 | $618.0K | 47.8K | Form 4 ↗ |
JOHNSON DAVID S director | Jun 1, 2026 | Award | 236.536 | $206.10 | $48.8K | 47.4K | Form 4 ↗ |
Miskel Christopher C. director | Jun 1, 2026 | Award | 194.081 | $206.10 | $40.0K | 10.6K | Form 4 ↗ |
Gallagher Patrick Murphy Chief Operating Officer | May 26, 2026 | Gift | 14,698 | — | — | 98.1K | Form 4 ↗ |
GALLAGHER J PATRICK JR CEO | May 26, 2026 | Gift | 14,698 | — | — | 109.4K | Form 4 ↗ |
Caplan Deborah H director | May 12, 2026 | Award | 1,110 | — | — | 2.6K | Form 4 ↗ |
Clarke Teresa Hillary director | May 12, 2026 | Award | 1,110 | — | — | 5.6K | Form 4 ↗ |
Coldman David John director | May 12, 2026 | Award | 1,110 | — | — | 16.3K | Form 4 ↗ |
Harries Richard de Winton Wilkin director | May 12, 2026 | Award | 1,110 | — | — | 2.4K | Form 4 ↗ |
JOHNSON DAVID S director | May 12, 2026 | Award | 1,110 | — | — | 47.2K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Arthur J. Gallagher & Co. (AJG) is primarily owned by institutional investors, who hold approximately 87.6% of total shares outstanding. Company insiders own approximately 1.11%, while retail and public investors account for the remaining 11.25%.
The largest institutional shareholder of Arthur J. Gallagher & Co. is VANGUARD GROUP INC, holding approximately 31.17 million shares — equal to 12.16% of outstanding shares — as of September 30, 2025.
A total of 1,372 institutional investors currently hold AJG stock, with a combined institutional value of approximately $69.62 billion as of the most recent 13F filing period.
Frequently asked questions
AJG ownershipArthur J. Gallagher & Co. (AJG) is primarily owned by institutional investors, who hold approximately 87.6% of shares. The largest shareholder is VANGUARD GROUP INC with a 12.16% stake. Company insiders hold 1.11%. Data sourced from SEC Form 13F as of September 30, 2025.