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Equibles

AON

Aon plc

Company with tickers: AON

CIK
315293
CUSIP
G0403H108
Shares Outstanding
213,576,949
13F Activity (30d)
691 filings 658 filers

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: 1,250
Total Value: $60,669,395,782
Total Shares: 187,958,971
Showing 1–100 of 1,274 holdings by value · page 1 of 13

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 1,250 13F filers · Δ vs Dec 31, 2025
Top Holder
8.6%
Jun 2023 → Mar 2026 · range 8.6% – 10.7%
−2.1 pts
Top 5
31.3%
Jun 2023 → Mar 2026 · range 31.3% – 36.3%
−3.9 pts
Top 10
47.2%
Jun 2023 → Mar 2026 · range 47.2% – 50.9%
−1.5 pts
HHI
291
Jun 2023 → Mar 2026 · range 291 – 363
Broadly held −55

Quarterly Activity

vs Dec 31, 2025
New
143
Increased
482
Decreased
412
Sold Out
166
Unchanged
213
Holder count: -23
Institutional value: -9.0%
Shares held: -0.5%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega JPMORGAN CHASE & CO +2,449,215 5,641,431
Mega MORGAN STANLEY +804,439 6,374,945
Mid Wealthspire Advisors, LLC +710,479 984,075
Mega Mitsubishi UFJ Asset Management Co., Ltd. +703,749 2,516,637
Mega PRICE T ROWE ASSOCIATES INC /MD/ +702,535 1,280,926

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Large EAGLE CAPITAL MANAGEMENT LLC −1,806,064 463,350
Mega FMR LLC −817,980 523,184
Mega Capital World Investors −775,116 11,477,788
Mega MILLENNIUM MANAGEMENT LLC −605,946 56,676
Large POLEN CAPITAL MANAGEMENT LLC −492,241 1,354,053

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 13,581,756 $4,383,919,201
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 4,559,035 $1,471,565,317
Mega VANGUARD FIDUCIARY TRUST CO 1,225,563 $395,587,225
Mid BAUPOST GROUP LLC/MA 769,000 $248,217,820
Mid Meritage Group LP 680,169 $219,544,949

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 20,171,049 $7,117,959,769
Mega Berkshire Hathaway Inc 3,602,995 $1,271,424,874
Mega NORGES BANK 3,275,848 $1,155,981,242
Mid MOORE CAPITAL MANAGEMENT, LP 139,600 $49,262,048
Large CIBC WORLD MARKETS CORP 68,101 $24,031,480
Filter: New 143 Increased 482 Reduced 412 Sold out 166 Unchanged 213
Showing 100 of 1,274
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $5,212,415,079 8.59% 16,148,507
Mega VANGUARD CAPITAL MANAGEMENT LLC $4,383,919,201 7.23% 13,581,756
Mega Capital World Investors $3,704,800,410 6.11% 11,477,788
Mega STATE STREET CORP $2,975,958,328 4.91% 9,219,773
Mega MASSACHUSETTS FINANCIAL SERVICES CO /MA/ $2,697,826,545 4.45% 8,358,097
Mega Dodge & Cox $2,619,713,144 4.32% 8,116,095
Mega MORGAN STANLEY $2,057,704,737 3.39% 6,374,945
Mega JPMORGAN CHASE & CO $1,820,941,088 3.00% 5,641,431
Mega GEODE CAPITAL MANAGEMENT, LLC $1,692,758,058 2.79% 5,244,309
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $1,471,565,317 2.43% 4,559,035
Mega Bank of New York Mellon Corp Bank $1,071,982,061 1.77% 3,321,092
Mega DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main Bank $951,687,778 1.57% 2,948,410
Large Independent Franchise Partners LLP $835,355,285 1.38% 2,588,002
Mega Mitsubishi UFJ Asset Management Co., Ltd. $812,320,090 1.34% 2,516,637
Large FARALLON CAPITAL MANAGEMENT LLC $811,029,293 1.34% 2,512,638
Mega NORTHERN TRUST CORP Bank $672,061,847 1.11% 2,082,105
Large Boston Partners $631,045,227 1.04% 1,955,032
Large WCM INVESTMENT MANAGEMENT, LLC $630,188,893 1.04% 1,952,379
Mega NEUBERGER BERMAN GROUP LLC $599,671,658 0.99% 1,857,834
Large Artisan Partners Limited Partnership $530,699,382 0.87% 1,644,152
Mega GOLDMAN SACHS GROUP INC $511,280,613 0.84% 1,583,991
Mega BANK OF AMERICA CORP /DE/ Bank $510,857,447 0.84% 1,582,680
Mid Veritas Asset Management LLP $490,715,010 0.81% 1,520,277
Mega Amundi $485,102,833 0.80% 1,502,890
Large DIAMOND HILL CAPITAL MANAGEMENT INC $480,260,165 0.79% 1,487,887
Mega Invesco Ltd. $479,852,164 0.79% 1,486,623
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $437,397,241 0.72% 1,355,094
Large POLEN CAPITAL MANAGEMENT LLC $437,061,227 0.72% 1,354,053
Mega Legal & General Group Plc $432,919,636 0.71% 1,341,222
Mega PRICE T ROWE ASSOCIATES INC /MD/ $413,457,294 0.68% 1,280,926
Large Mawer Investment Management Ltd. $412,218,464 0.68% 1,277,088
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $407,388,057 0.67% 1,262,123
Mega DIMENSIONAL FUND ADVISORS LP $404,691,555 0.67% 1,253,769
Mega VANGUARD FIDUCIARY TRUST CO Bank $395,587,225 0.65% 1,225,563
Large LAZARD ASSET MANAGEMENT LLC $392,901,695 0.65% 1,217,243
Large Cantillon Capital Management LLC $353,629,375 0.58% 1,095,574
Large VIKING GLOBAL INVESTORS LP $350,898,656 0.58% 1,087,114
Mega AMERIPRISE FINANCIAL INC $348,819,306 0.57% 1,080,672
Large Sustainable Growth Advisers, LP $339,501,617 0.56% 1,051,805
Large Vontobel Holding Ltd. $322,514,025 0.53% 999,176
Mid Wealthspire Advisors, LLC $317,639,728 0.52% 984,075
Mega AQR CAPITAL MANAGEMENT LLC $316,245,313 0.52% 979,755
Mid Longview Partners (Guernsey) LTD $315,118,171 0.52% 976,263
Mega UBS Group AG $291,769,877 0.48% 903,928
Mega Nuveen, LLC $274,711,924 0.45% 851,081
Mega Capital International Investors $260,507,668 0.43% 807,075
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $257,390,582 0.42% 797,418
Mid BAUPOST GROUP LLC/MA $248,217,820 0.41% 769,000
Mega FIL Ltd $240,780,645 0.40% 745,959
Mid First Pacific Advisors, LP $226,997,617 0.37% 703,258
Mega ROYAL BANK OF CANADA Bank $222,114,597 0.37% 688,130
Mid Meritage Group LP $219,544,949 0.36% 680,169
Mid ALTRINSIC GLOBAL ADVISORS LLC $213,268,490 0.35% 660,724
Mega DEUTSCHE BANK AG\ Bank $208,107,883 0.34% 644,736
Large Focus Partners Wealth $203,611,237 0.34% 630,805
Mid COMGEST GLOBAL INVESTORS S.A.S. $202,931,786 0.33% 628,700
Mega BARCLAYS PLC $193,846,819 0.32% 600,554
Mega Swiss National Bank Bank $193,429,142 0.32% 599,260
Large OMERS ADMINISTRATION Corp $183,170,871 0.30% 567,479
Large Fiera Capital Corp $177,621,637 0.29% 550,287
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $176,835,023 0.29% 547,850
Mega FMR LLC $168,873,329 0.28% 523,184
Large USS Investment Management Ltd $162,190,494 0.27% 502,480
Mid Southpoint Capital Advisors LP $161,390,000 0.27% 500,000
Mega California Public Employees Retirement System Pension $153,624,558 0.25% 475,942
Mega National Pension Service Pension $153,495,769 0.25% 475,543
Mega Vanguard Global Advisers, LLC $151,425,781 0.25% 469,130
Large EAGLE CAPITAL MANAGEMENT LLC $149,560,113 0.25% 463,350
Large SEI INVESTMENTS CO $145,872,350 0.24% 451,925
Mega Sumitomo Mitsui Trust Group, Inc. $144,379,816 0.24% 447,301
Mega ENVESTNET ASSET MANAGEMENT INC $136,603,401 0.23% 423,209
Large BLAIR WILLIAM & CO/IL $136,085,661 0.22% 421,605
Mid C WorldWide Group Holding A/S $128,889,927 0.21% 399,312
Mid Douglass Winthrop Advisors, LLC $127,348,330 0.21% 394,536
Mega RHUMBLINE ADVISERS $122,864,270 0.20% 380,644
Mega BNP PARIBAS ARBITRAGE, SA $118,899,240 0.20% 368,360
Mega WELLS FARGO & COMPANY/MN $118,042,580 0.19% 365,706
Mega VANGUARD ASSET MANAGEMENT, Ltd $116,800,525 0.19% 361,858
Mega FRANKLIN RESOURCES INC $116,625,250 0.19% 361,315
Mega HSBC HOLDINGS PLC $114,315,117 0.19% 354,158
Mid Haverford Trust Co Bank $111,719,645 0.18% 346,117
Large NATIXIS ADVISORS, LLC $110,370,424 0.18% 341,937
Large DAVENPORT & Co LLC $108,790,093 0.18% 337,041
Mid Prana Capital Management, LP $104,405,773 0.17% 323,458
Mid Bowie Capital Management, LLC $103,989,064 0.17% 322,167
Mid Cryder Capital Partners LLP $103,834,775 0.17% 321,689
Large AVIVA PLC $100,169,931 0.17% 310,335
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $99,730,304 0.16% 308,973
Large LORD, ABBETT & CO. LLC $96,359,513 0.16% 298,530
Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. $94,037,755 0.16% 291,337
Mega BANK OF MONTREAL /CAN/ Bank $93,036,488 0.15% 288,235
Mid BRISTOL JOHN W & CO INC /NY/ $91,364,169 0.15% 283,054
Large DekaBank Deutsche Girozentrale Bank $88,907,813 0.15% 275,444
Mid CapitalatWork S.A. $87,797,128 0.14% 272,003
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $86,846,864 0.14% 269,059
Large Russell Investments Group, Ltd. $84,864,020 0.14% 262,916
Large JONES FINANCIAL COMPANIES LLLP $83,610,671 0.14% 259,033
Mid Scharf Investments, LLC $82,289,855 0.14% 254,941
Mid BloombergSen Inc. $81,988,056 0.14% 254,006
Mega PRINCIPAL FINANCIAL GROUP INC $80,993,570 0.13% 250,925

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