Skip to main content
AJG logo

AJG · Arthur J. Gallagher & Co.

Track AJG — free
Market Cap
$68.58B
Shares
256.30M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 1,297
Total Value: $54,969,852,554
Total Shares: 239,447,216
Showing 1–100 of 1,323 holdings by value · page 1 of 14

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 1,297 13F filers · Δ vs Mar 31, 2026
Top Holder
8.3%
Sep 2023 → Jun 2026 · range 8.3% – 13.8%
−0.2 pts
Top 5
34.3%
Sep 2023 → Jun 2026 · range 34.3% – 42.4%
−2.1 pts
Top 10
53.6%
Sep 2023 → Jun 2026 · range 51.3% – 58.9%
−0.7 pts
HHI
346
Sep 2023 → Jun 2026 · range 346 – 475
Broadly held−20

Quarterly Activity

vs Mar 31, 2026
New
162
Increased
464
Decreased
486
Sold Out
124
Unchanged
185
Holder count: +38
Institutional value: +10.1%
Shares held: +3.8%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 1,323
Export CSV
Holder Value (USD) % of 13F Shares Open
Key facts CIK 354190 CUSIP 363576109 13F (30d) 865 filings 823 filers Visit website Investor relations