AON Institutional Ownership & Shareholders
Aon Plc (AON) is currently held by 1,199 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $64.35B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of AON tracked by InsiderSet, reporting ownership valued at approximately $5.21B in its June 30, 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 $5.06B, representing an estimated loss of -3.02% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 50% of the total disclosed AON value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Jpmorgan Chase & Co, and several other long-term asset managers with concentrated positions in Aon Plc (AON).
This page ranks the largest institutional AON 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
1,199
Total Reported Value
$64.35B
Largest Holder
Blackrock, Inc.
Largest Position
$5.21B
Insider Transactions (90d)
6
Latest Filing Quarter
Q2 2026
New Institutional Positions
22
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.08% | 15,716,429 | $5,212,982,529 | $5,055,503,716 | -$157,478,813 | -3.02% | |
| Vanguard Capital Management Llc | 0.10% | 13,603,465 | $4,512,133,306 | $4,375,826,587 | -$136,306,719 | -3.02% | |
| Jpmorgan Chase & Co | 0.23% | 12,175,974 | $3,988,484,521 | $3,916,645,557 | -$71,838,964 | -1.80% | |
| Capital World Investors | 0.46% | 11,711,650 | $3,884,630,624 | $3,767,286,456 | -$117,344,169 | -3.02% | |
| State Street Corp | 0.09% | 9,416,039 | $3,123,430,849 | $3,028,857,265 | -$94,573,584 | -3.03% | |
| Dodge & Cox Stock Fund | V. D. Dodge, E. M. Cox | 1.49% | 8,593,144 | $2,850,259,933 | $2,764,156,630 | -$86,103,303 | -3.02% |
| Massachusetts Financial Services Co | 0.82% | 7,615,397 | $2,575,299,415 | $2,449,644,753 | -$125,654,662 | -4.88% | |
| Vanguard Portfolio Management Llc | 0.11% | 7,202,991 | $2,389,160,085 | $2,316,986,115 | -$72,173,970 | -3.02% | |
| Morgan Stanley | 0.11% | 6,214,787 | $2,061,384,164 | $1,999,110,534 | -$62,273,630 | -3.02% | |
| Banque Cantonale Vaudoise | 0.25% | 5,550 | $1,840,000,000 | $1,785,269 | -$1,838,214,732 | -99.90% | |
| Geode Capital Management, Llc | 0.09% | 5,180,553 | $1,711,000,834 | $1,666,428,484 | -$44,572,350 | -2.61% | |
| Bank Of New York Mellon Corp | 0.17% | 3,191,212 | $1,058,492,839 | $1,026,517,164 | -$31,975,675 | -3.02% | |
| Price T Rowe Associates Inc | 0.10% | 3,136,640 | $1,040,393,000 | $1,008,962,989 | -$31,430,011 | -3.02% | |
| Norges Bank | 0.09% | 2,796,760 | $927,657,324 | $899,633,789 | -$28,023,535 | -3.02% | |
| Mitsubishi Ufj Asset Management Co., Ltd. | 0.51% | 2,753,913 | $913,445,403 | $885,851,195 | -$27,594,208 | -3.02% | |
| Independent Franchise Partners Llp | 5.76% | 2,646,943 | $877,964,523 | $851,442,155 | -$26,522,368 | -3.02% | |
| Arrowstreet Capital, Limited Partnership | 0.38% | 2,614,754 | $867,287,754 | $841,087,919 | -$26,199,835 | -3.02% | |
| Dz Bank Ag Deutsche Zentral Genossenschafts Bank, Frankfurt Am Main | 0.59% | 2,255,768 | $748,215,688 | $725,612,893 | -$22,602,795 | -3.02% | |
| Boston Partners | 0.62% | 2,089,773 | $695,754,228 | $672,217,281 | -$23,536,947 | -3.38% | |
| Northern Trust Corp | 0.08% | 2,040,534 | $676,824,722 | $656,378,572 | -$20,446,150 | -3.02% | |
| Neuberger Berman Group Llc | 0.47% | 1,804,303 | $636,733,167 | $580,390,146 | -$56,343,021 | -8.85% | |
| Aqr Capital Management Llc | 0.22% | 1,905,800 | $623,005,861 | $613,038,686 | -$9,967,175 | -1.60% | |
| Wcm Investment Management, Llc | 1.11% | 1,875,859 | $614,475,273 | $603,407,565 | -$11,067,708 | -1.80% | |
| Artisan Partners Limited Partnership | 1.00% | 1,850,623 | $613,833,143 | $595,289,900 | -$18,543,243 | -3.02% | |
| Goldman Sachs Group Inc | 0.06% | 1,748,801 | $580,059,778 | $562,536,818 | -$17,522,960 | -3.02% | |
| Bank Of America Corp | 0.03% | 1,624,970 | $538,986,283 | $522,704,100 | -$16,282,183 | -3.02% | |
| Veritas Asset Management Llp | 8.40% | 1,408,111 | $467,056,338 | $452,947,065 | -$14,109,273 | -3.02% | |
| Charles Schwab Investment Management Inc | 0.06% | 1,345,367 | $446,244,780 | $432,764,203 | -$13,480,577 | -3.02% | |
| Legal & General Group Plc | 0.09% | 1,288,852 | $427,499,317 | $414,585,023 | -$12,914,294 | -3.02% | |
| Dimensional Fund Advisors Lp | 0.07% | 1,240,634 | $411,458,559 | $399,074,739 | -$12,383,820 | -3.01% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.08% | 1,262,123 | $407,388,062 | $405,987,105 | -$1,400,957 | -0.34% | |
| Vanguard Fiduciary Trust Co | 0.09% | 1,190,449 | $394,860,029 | $382,931,730 | -$11,928,299 | -3.02% | |
| Mawer Investment Management Ltd. | 2.64% | 1,171,624 | $388,615,965 | $376,876,292 | -$11,739,673 | -3.02% | |
| Viking Global Investors | Ole Andreas Halvorsen | 1.09% | 1,151,269 | $381,864,415 | $370,328,699 | -$11,535,716 | -3.02% |
| Lazard Asset Management Llc | 0.56% | 1,122,874 | $372,445,921 | $361,194,880 | -$11,251,041 | -3.02% | |
| Diamond Hill Capital Management Inc | 2.96% | 1,114,156 | $369,554,433 | $358,390,561 | -$11,163,872 | -3.02% | |
| Invesco Ltd. | 0.03% | 1,069,331 | $354,686,448 | $343,971,703 | -$10,714,745 | -3.02% | |
| Nuveen, Llc | 0.07% | 878,682 | $291,449,600 | $282,645,639 | -$8,803,961 | -3.02% | |
| Ubs Group Ag | 0.04% | 822,267 | $272,737,742 | $264,498,626 | -$8,239,116 | -3.02% | |
| Comgest Global Investors S.A.S. | 5.99% | 820,270 | $272,075,356 | $263,856,251 | -$8,219,105 | -3.02% | |
| Capital International Investors | 0.05% | 793,989 | $263,060,285 | $255,402,442 | -$7,657,843 | -2.91% | |
| Longview Partners (Guernsey) Ltd | 4.14% | 768,975 | $255,061,318 | $247,356,188 | -$7,705,130 | -3.02% | |
| Fil Ltd | 0.18% | 753,981 | $250,087,958 | $242,533,068 | -$7,554,890 | -3.02% | |
| Wealthspire Advisors, Llc | 1.33% | 726,424 | $240,947,580 | $233,668,808 | -$7,278,772 | -3.02% | |
| Focus Partners Wealth | 0.24% | 706,903 | $234,468,726 | $227,389,488 | -$7,079,238 | -3.02% | |
| Ameriprise Financial Inc | 0.05% | 692,802 | $229,811,704 | $222,853,619 | -$6,958,085 | -3.03% | |
| Baupost Group | Seth Klarman | 4.21% | 687,000 | $227,871,000 | $220,987,290 | -$6,883,710 | -3.02% |
| Meritage Group | Nathaniel Simons | 8.75% | 684,518 | $227,047,775 | $220,188,905 | -$6,858,870 | -3.02% |
| First Pacific Advisors, Lp | 2.80% | 681,367 | $226,002,620 | $219,175,323 | -$6,827,297 | -3.02% | |
| Altrinsic Global Advisors Llc | 7.87% | 646,424 | $214,412,377 | $207,935,208 | -$6,477,169 | -3.02% |
Frequently asked questions about AON
Who are the largest institutional holders of AON?
The largest institutional holders of AON reported in the latest SEC Form 13F filings include Blackrock, Inc., Vanguard Capital Management Llc, Jpmorgan Chase & Co, Capital World Investors, and State Street Corp. InsiderSet ranks institutional holders by their latest reported AON position.
What is AON institutional ownership?
This page tracks AON positions reported by institutional investment managers through SEC Form 13F. Aon Plc (AON) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own AON?
InsiderSet currently tracks 1,199 institutional managers reporting AON holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of AON shareholders.
How much AON stock do institutions own?
Institutional investment managers disclosed approximately $64.35B in AON holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was AON institutional ownership last updated?
The latest AON institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional AON holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its AON position after the reporting date.
Are institutions buying or selling AON?
Institutional buying and selling can be analyzed by comparing AON positions across consecutive 13F reporting periods. InsiderSet's AON Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View AON ownership changes.
How has AON institutional ownership changed over time?
InsiderSet tracks AON institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.