ARTHUR J GALLAGHER & CO (AJG) Institutional Shareholders
ARTHUR J GALLAGHER & CO (AJG) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $44.66B in AJG holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of AJG tracked by InsiderSet, reporting ownership valued at approximately $4.18B in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $4.79B, representing an estimated gain of +14.54% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 53% of the total disclosed AJG value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Fmr Llc, and several other long-term asset managers with concentrated positions in ARTHUR J GALLAGHER & CO (AJG).
This page ranks the largest institutional AJG shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
1,240
Total Reported Value
$44.66B
Largest Holder
Blackrock, Inc.
Largest Position
$4.18B
Insider Transactions (90d)
8
Latest Filing Quarter
Q2 2026
New Institutional Positions
45
Funds Exiting Positions
1
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.07% | 19,307,796 | $4,181,682,664 | $4,789,491,876 | +$607,809,212 | +14.54% | |
| Vanguard Capital Management Llc | 0.09% | 16,699,898 | $3,616,863,909 | $4,142,576,698 | +$525,712,789 | +14.54% | |
| Fmr Llc | 0.17% | 14,620,963 | $3,166,608,210 | $3,626,876,082 | +$460,267,872 | +14.54% | |
| Capital World Investors | 0.41% | 13,817,720 | $2,992,606,755 | $3,427,623,623 | +$435,016,868 | +14.54% | |
| Vanguard Portfolio Management Llc | 0.14% | 12,419,279 | $2,689,767,446 | $3,080,726,349 | +$390,958,903 | +14.54% | |
| State Street Corp | 0.08% | 10,973,921 | $2,376,731,810 | $2,722,190,843 | +$345,459,033 | +14.54% | |
| Dodge & Cox Stock Fund | V. D. Dodge, E. M. Cox | 0.88% | 7,354,915 | $1,592,927,491 | $1,824,460,215 | +$231,532,724 | +14.54% |
| Geode Capital Management, Llc | 0.08% | 6,243,640 | $1,351,973,825 | $1,548,797,338 | +$196,823,513 | +14.56% | |
| Morgan Stanley | 0.05% | 4,056,175 | $878,487,126 | $1,006,174,771 | +$127,687,645 | +14.53% | |
| Principal Financial Group Inc | 0.38% | 3,242,088 | $702,181,687 | $804,232,349 | +$102,050,662 | +14.53% | |
| Capital Research Global Investors | 0.10% | 2,980,131 | $645,434,734 | $739,251,296 | +$93,816,562 | +14.54% | |
| Eagle Capital Management | Ravenel Boykin Curry IV | 1.94% | 2,665,572 | $577,309,518 | $661,221,790 | +$83,912,272 | +14.54% |
| Capital International Investors | 0.13% | 2,596,653 | $562,331,598 | $644,125,743 | +$81,794,145 | +14.55% | |
| Wellington Management Group Llp | 0.10% | 2,583,359 | $559,503,892 | $640,828,034 | +$81,324,142 | +14.54% | |
| Gtcr Llc | 13.60% | 2,373,773 | $514,111,756 | $588,838,130 | +$74,726,374 | +14.54% | |
| Wcm Investment Management, Llc | 1.16% | 2,362,513 | $510,184,738 | $586,044,975 | +$75,860,237 | +14.87% | |
| Northern Trust Corp | 0.06% | 2,229,829 | $482,936,365 | $553,131,382 | +$70,195,017 | +14.54% | |
| Charles Schwab Investment Management Inc | 0.07% | 2,109,463 | $457,172,349 | $523,273,392 | +$66,101,043 | +14.46% | |
| Janus Henderson Group Plc | 0.21% | 1,970,990 | $426,886,844 | $488,923,779 | +$62,036,935 | +14.53% | |
| Franklin Resources Inc | 0.10% | 1,954,100 | $423,218,980 | $484,734,046 | +$61,515,066 | +14.54% | |
| Goldman Sachs Group Inc | 0.06% | 1,953,270 | $423,039,069 | $484,528,156 | +$61,489,087 | +14.54% | |
| Bank Of America Corp | 0.03% | 1,854,488 | $401,644,934 | $460,024,293 | +$58,379,359 | +14.54% | |
| Invesco Ltd. | 0.06% | 1,715,812 | $371,610,634 | $425,624,325 | +$54,013,691 | +14.54% | |
| Brown Advisory Inc | 0.56% | 1,580,307 | $342,266,438 | $392,010,954 | +$49,744,516 | +14.53% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.07% | 1,449,869 | $314,012,628 | $359,654,504 | +$45,641,876 | +14.54% | |
| Vanguard Fiduciary Trust Co | 0.08% | 1,447,832 | $313,571,455 | $359,149,206 | +$45,577,751 | +14.54% | |
| Focus Partners Wealth | 0.33% | 1,379,397 | $298,750,248 | $342,173,220 | +$43,422,972 | +14.53% | |
| Legal & General Group Plc | 0.07% | 1,373,429 | $297,457,250 | $340,692,798 | +$43,235,548 | +14.54% | |
| Mitsubishi Ufj Asset Management Co., Ltd. | 0.19% | 1,301,447 | $281,867,391 | $322,836,943 | +$40,969,552 | +14.54% | |
| Bank Of New York Mellon Corp | 0.05% | 1,287,455 | $278,836,950 | $319,366,087 | +$40,529,137 | +14.54% | |
| Fil Ltd | 0.20% | 1,209,624 | $261,980,366 | $300,059,329 | +$38,078,963 | +14.54% | |
| Beck Mack & Oliver Llc | 4.75% | 1,062,566 | $230,130,544 | $263,580,122 | +$33,449,578 | +14.54% | |
| Brown Brothers Harriman & Co | 1.20% | 1,031,635 | $223,431,418 | $255,907,378 | +$32,475,960 | +14.54% | |
| Apg Asset Management N.V. | 0.70% | 1,177,502 | $221,336,038 | $292,091,146 | +$70,755,108 | +31.97% | |
| Ubs Group Ag | 0.04% | 989,174 | $214,235,304 | $245,374,502 | +$31,139,198 | +14.54% | |
| Amundi | 0.06% | 939,835 | $203,549,464 | $233,135,470 | +$29,586,006 | +14.54% | |
| Alliancebernstein L.P. | 0.07% | 781,086 | $202,137,246 | $193,756,193 | -$8,381,053 | -4.15% | |
| Guinness Asset Management Ltd | 3.30% | 851,348 | $194,729,830 | $211,185,385 | +$16,455,555 | +8.45% | |
| Artisan Partners Limited Partnership | 0.31% | 884,899 | $191,651,528 | $219,508,046 | +$27,856,518 | +14.53% | |
| Envestnet Asset Management Inc | 0.05% | 833,230 | $191,284,684 | $206,691,034 | +$15,406,350 | +8.05% | |
| Dimensional Fund Advisors Lp | 0.04% | 853,192 | $184,780,946 | $211,642,808 | +$26,861,862 | +14.54% | |
| Woodline Partners Lp | 0.69% | 840,676 | $182,073,608 | $208,538,089 | +$26,464,481 | +14.54% | |
| Cooke & Bieler Lp | 2.04% | 769,623 | $176,682,352 | $190,912,681 | +$14,230,329 | +8.05% | |
| Boston Partners | 0.18% | 808,257 | $175,106,160 | $200,496,231 | +$25,390,071 | +14.50% | |
| California Public Employees Retirement System | 0.11% | 789,499 | $170,989,693 | $195,843,122 | +$24,853,429 | +14.54% | |
| Citadel Advisors Llc | 0.12% | 762,692 | $165,183,833 | $189,193,378 | +$24,009,545 | +14.54% | |
| Deutsche Bank Ag\ | 0.05% | 755,049 | $163,528,512 | $187,297,455 | +$23,768,943 | +14.54% | |
| Swiss National Bank | 0.09% | 753,660 | $163,227,683 | $186,952,900 | +$23,725,217 | +14.54% | |
| Viking Global Investors | Ole Andreas Halvorsen | 0.44% | 727,441 | $157,549,172 | $180,449,014 | +$22,899,842 | +14.54% |
| Nuveen, Llc | 0.04% | 715,125 | $154,881,772 | $177,393,908 | +$22,512,136 | +14.54% |
Frequently asked questions about AJG
Who owns the most AJG stock?
The largest holders of AJG are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ARTHUR J GALLAGHER & CO (AJG).
Is AJG widely held by superinvestors?
Many widely followed stocks like AJG appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly AJG is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.