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Disclosery

AON AON PLC

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Stock (common), issuer CIK 315293

1,216 managers (1,257 13F filers) reported a position in AON shares at 2026-03-31, 187,586,293 shares in all. 117 filers opened a position and 147 filers sold out during the quarter.

Managers
1,216
13F filers
1,257
New
117
Added
484
Reduced
417
Sold out
147
Shares held by filers
187,586,293

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
VANGUARD GROUP INCgroup of 8 filers holding20,327,022$6.56B+20,299,020Timeline
BlackRock, Inc.in group BlackRock, Inc.16,148,507$5.21B0.09%-88,42713F-HRTimelineGroup
Capital World Investors11,477,788$3.7B0.51%-775,11613F-HRTimeline
STATE STREET CORPin group STATE STREET CORP9,219,773$2.98B0.1%+15,80013F-HRTimelineGroup
MASSACHUSETTS FINANCIAL SERVICES CO /MA/in group MASSACHUSETTS FINANCIAL SERVI…8,358,097$2.75B0.93%-186,93913F-HRTimelineGroup
Dodge & Cox8,116,095$2.62B1.44%+263,63913F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY6,374,945$2.06B0.12%+804,43913F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO5,641,431$1.83B0.12%+2,449,21513F-HR/ATimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC5,244,309$1.69B0.1%+102,94613F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp3,321,092$1.07B0.2%-157,96913F-HRTimelineGroup
DZ BANK AG Deutsche Zentral Genossensch…in group DZ BANK AG Deutsche Zentral G…2,948,410$952M0.87%+533,40413F-HRTimelineGroup
Mitsubishi UFJ Trust & Banking Corpgroup of 5 filers holding2,645,875$854M+664,214Timeline
Independent Franchise Partners LLP2,588,002$835M5.85%+472,47913F-HRTimeline
FARALLON CAPITAL MANAGEMENT, L.L.C.2,512,638$811M4.81%-152,60013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
UBS Group AGgroup of 2 filers holding2,166,051$699M+106,626Timeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP2,082,105$672M0.09%-17,54713F-HRTimelineGroup
WCM INVESTMENT MANAGEMENT, LLC1,952,379$633M1.44%-33,74913F-HRTimeline
Boston Partnersin group Boston Trust Walden Corp1,955,032$631M0.66%+320,02513F-HRTimelineGroup
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC1,857,834$600M0.46%+53,53113F-HRTimelineGroup
Artisan Partners Limited Partnership1,644,152$531M0.87%+526,72413F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC1,583,991$511M0.07%+174,19413F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/1,582,680$511M0.04%+222,09213F-HRTimelineGroup
Veritas Asset Management LLP1,520,277$491M8.31%-472,17613F-HRTimeline
Amundiin group Amundi1,502,890$485M0.13%+285,54913F-HRTimelineGroup
Diamond Hill Capital Management, LLC (I…1,487,887$480M3%-108,42813F-HRTimeline
Invesco Ltd.in group Invesco Ltd.1,486,623$480M0.05%+150,49413F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co1,355,094$437M0.07%+44,35413F-HRTimelineGroup
POLEN CAPITAL MANAGEMENT LLC1,354,053$437M3.02%-492,24113F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc1,341,222$433M0.1%-8,84713F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/1,280,926$413M0.05%+702,53513F-HRTimeline
Mawer Investment Management Ltd.1,277,088$412M2.67%-200,60513F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,253,769$405M0.08%+213,05113F-HRTimelineGroup
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC1,217,243$393M0.65%-68,82913F-HRTimelineGroup
Cantillon Capital Management LLCin group Cantillon Capital Management …1,095,574$354M2.35%-147,44413F-HRTimelineGroup
VIKING GLOBAL INVESTORS LPin group VIKING GLOBAL INVESTORS LP1,087,114$351M0.98%+303,46413F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC1,080,672$349M0.08%-27,54213F-HR/ATimelineGroup
Sustainable Growth Advisers, LP1,051,805$340M3.2%-169,66213F-HRTimeline
Capital International Investorsgroup of 4 filers holding1,013,123$327M-431,187Timeline
Vontobel Holding Ltd.in group Vontobel Holding Ltd.999,176$323M1.11%+239,03713F-HRTimelineGroup
Wealthspire Advisors, LLC984,075$318M2.49%+710,47913F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC979,755$316M0.14%+549,58213F-HRTimelineGroup
Longview Partners (Guernsey) LTDin group Longview Partners (Guernsey) …976,263$315M4.46%-129,52113F-HRTimelineGroup
TIAAgroup of 4 filers holding853,886$276M+43,224Timeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …797,418$257M0.14%+340,86613F-HRTimelineGroup
BAUPOST GROUP LLC/MA769,000$248M4.85%new13F-HRTimeline
FIL Ltdin group FIL Ltd745,959$241M0.19%-137,79813F-HRTimelineGroup
First Pacific Advisors, LP703,258$227M3.18%+46,72713F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA688,130$222M0.04%-266,61813F-HRTimelineGroup
Meritage Group LPin group Meritage Group LP680,169$220M8.28%new13F-HRTimelineGroup
ALTRINSIC GLOBAL ADVISORS LLC660,724$213M7.64%+9,51713F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\644,736$208M0.07%-150,89413F-HRTimelineGroup
Focus Partners Wealthgroup of 2 filers holding634,652$205M+88,448Timeline
COMGEST GLOBAL INVESTORS S.A.S.in group COMGEST GLOBAL INVESTORS S.A.…628,700$203M4.42%+371,90013F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC600,554$194M0.07%+12,01013F-HRTimelineGroup
Swiss National Bank599,260$193M0.11%+37,92013F-HRTimeline
OMERS ADMINISTRATION Corp567,479$183M1.18%013F-HRTimeline
Fiera Capital Corpin group Fiera Capital Corp550,287$178M0.61%+16,70513F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …547,850$177M0.15%+315,81713F-HRTimelineGroup
FMR LLCin group FMR LLC523,184$169M0.01%-817,98013F-HRTimelineGroup
USS Investment Management Ltd502,480$162M0.63%-179,26313F-HRTimeline
Southpoint Capital Advisors LPin group Southpoint Capital Advisors LP500,000$161M3.32%-150,00013F-HRTimelineGroup
California Public Employees Retirement …475,942$154M0.09%-132,27113F-HRTimeline
National Pension Service475,543$153M0.12%+3,04313F-HRTimeline
EAGLE CAPITAL MANAGEMENT LLC463,350$150M0.5%-1,806,06413F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO451,925$146M0.13%-9,87513F-HRTimelineGroup
Sumitomo Mitsui Trust Group, Inc.in group Sumitomo Mitsui Trust Group, …447,301$144M0.09%-23,60113F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCgroup of 2 filers holding424,743$137M+78,777Timeline
BLAIR WILLIAM & CO/IL421,605$136M0.39%-74,70213F-HRTimeline
C WorldWide Group Holding A/Sin group C WorldWide Group Holding A/S399,312$129M2.77%-32,86813F-HRTimelineGroup
Douglass Winthrop Advisors, LLC394,536$127M2.33%+1,92113F-HRTimeline
RHUMBLINE ADVISERS380,644$123M0.11%-3,17913F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS368,360$119M0.08%-53,70413F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN365,706$118M0.02%+25,65713F-HR/ATimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources361,315$117M0.03%+71,05113F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC354,158$114M0.07%+163,47913F-HRTimelineGroup
Haverford Trust Co346,117$112M1.02%-5,05113F-HRTimeline
NATIXIS ADVISORS, LLCin group Natixis Investment Managers341,937$110M0.15%+7,42613F-HRTimelineGroup
DAVENPORT & Co LLC337,041$109M0.6%+67,68113F-HRTimeline
Prana Capital Management, LP323,458$104M3.2%+167,30113F-HRTimeline
Bowie Capital Management, LLC322,167$104M4.92%-21,98213F-HRTimeline
Cryder Capital Partners LLP321,689$104M6.78%+26,53813F-HRTimeline
AVIVA PLCin group AVIVA PLC310,335$100M0.17%-23,11913F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…308,973$99.7M0.11%-9,36813F-HRTimeline
LORD, ABBETT & CO. LLC298,530$96.4M0.31%+26,48413F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …291,337$94.1M0.11%+238,67213F-HRTimelineGroup
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/288,235$93M0.04%-27,73713F-HRTimelineGroup
BRISTOL JOHN W & CO INC /NY/283,054$91.4M1.5%-3,07413F-HRTimeline
DekaBank Deutsche Girozentrale275,444$90.4M0.15%013F-HRTimeline
CapitalatWork S.A.in group CapitalatWork S.A.272,003$87.8M2.61%+74,14913F-HR/ATimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD269,059$86.8M0.06%+246,71213F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…262,916$84.9M0.09%-43,58213F-HRTimelineGroup
Scharf Investments, LLC254,941$82.3M2.54%+46,83013F-HRTimeline
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding254,254$82.1M+5,773Timeline
BloombergSen Inc.254,006$82M9.18%-8,74413F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP259,033$81.3M0.04%+253,76213F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC250,447$80.8M0.05%+28,02213F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND244,232$78.8M0.11%+1,60013F-HRTimeline
ALLIANCEBERNSTEIN L.P.220,323$77.7M0.03%+1,82813F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC234,621$75.7M0.02%-12,02413F-HRTimelineGroup
Verition Fund Management LLC228,209$73.7M0.71%+20,64713F-HRTimeline
Quantinno Capital Management LP225,807$72.9M0.12%+109,49213F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management224,321$72.4M0.14%-162,69213F-HRTimelineGroup
Ensign Peak Advisors, Inc223,178$72M0.13%+16,69313F-HR/ATimeline
ADAGE CAPITAL PARTNERS GP, L.L.C.in group ADAGE CAPITAL PARTNERS GP, L.…222,169$71.7M0.11%-384,40013F-HRTimelineGroup
WEITZ INVESTMENT MANAGEMENT, INC.213,860$69M4.82%-4,87513F-HRTimeline
NOMURA ASSET MANAGEMENT CO LTDgroup of 3 filers holding185,090$59.7M+8,060Timeline
FIDUCIENT ADVISORS LLC183,310$59.2M7.73%+63,72013F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…181,412$58.6M0.11%013F-HRTimeline
NICHOLAS COMPANY, INC.181,227$58.5M1.15%-17513F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS180,893$58.4M0.24%+68,61213F-HRTimeline
EMINENCE CAPITAL, LP179,019$57.8M1.32%new13F-HRTimeline
Ninety One North America, Inc.175,559$56.7M2.54%-92613F-HRTimeline
Korea Investment CORP168,112$54.3M0.11%+64,17313F-HRTimeline
MACKENZIE FINANCIAL CORP166,498$53.7M0.06%-162,20313F-HRTimeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…159,373$51.4M0.08%+117,87713F-HRTimeline
Aberdeen Group plcin group Aberdeen Group plc158,598$51.2M0.08%+5,30913F-HRTimelineGroup
GFI Investment Counsel Ltd.157,437$50.8M6.95%-9,72513F-HRTimeline
NEW YORK STATE TEACHERS RETIREMENT SYST…155,300$50.1M0.1%013F-HRTimeline
State of Tennessee, Department of Treas…153,379$49.5M0.17%+14,57813F-HRTimeline
Petrus Trust Company, LTA153,300$49.5M5.41%+9,30013F-HRTimeline
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP149,135$48.1M0.04%+4,70313F-HRTimelineGroup
Zurich Insurance Group Ltd/FIin group Zurich Insurance Group Ltd/FI148,305$47.9M0.38%+23,41613F-HRTimelineGroup
YCG, LLC147,010$47.5M4.3%-4,43313F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC144,445$46.6M0.46%-11,81013F-HRTimeline
M.D. Sass, LLC142,362$46M3.48%+33,83113F-HRTimeline
Man Group plcin group Man Group plc139,252$44.9M0.09%+123,43113F-HRTimelineGroup
Ninety One UK Ltd137,569$44.4M0.1%-65413F-HRTimeline
STOREBRAND ASSET MANAGEMENT AS137,534$44.4M0.13%-5,05113F-HRTimeline
Markel Group Inc.in group Markel Group Inc.135,800$43.8M0.37%+1,75013F-HRTimelineGroup
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/135,728$43.8M0.04%+74,20213F-HRTimelineGroup
Nippon Life Global Investors Americas, …130,660$42.2M1.9%+31,69013F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.128,323$41.4M0.03%+85,88813F-HRTimelineGroup
DAVIS R M INC127,830$41.3M0.73%+1,33513F-HRTimeline
LFL Advisers, LLC126,666$40.9M12.3%+34,00913F-HRTimeline
AMF Tjanstepension AB122,843$39.7M0.26%+3,37713F-HRTimeline
HM PAYSON & CO122,238$39.5M0.57%-2,72513F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCgroup of 2 filers holding121,581$39.2M-344,635Timeline
DANSKE BANK A/S120,577$38.9M0.09%-48313F-HRTimeline
TCTC Holdings, LLCin group TCTC Holdings, LLC120,000$38.7M1.1%-16113F-HRTimelineGroup
1832 Asset Management L.P.119,568$38.6M0.05%+84,65413F-HRTimeline
SCHRODER INVESTMENT MANAGEMENT GROUP118,198$38.3M0.03%+44,26913F-HRTimeline
VOLORIDGE INVESTMENT MANAGEMENT, LLC114,974$37.1M0.15%new13F-HRTimeline
Schonfeld Strategic Advisors LLC114,003$36.8M0.3%+42,62913F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD111,288$35.9M0.08%+3,02913F-HRTimeline
Tidal Investments LLCin group Tidal Investments LLC111,064$35.8M0.11%+30,77413F-HRTimelineGroup
Cannell & Spears LLC109,902$35.5M0.7%-94713F-HR/ATimeline
Night Owl Capital Management, LLC109,488$35.3M4.12%+71413F-HRTimeline
Chevy Chase Trust Holdings, LLCin group Chevy Chase Trust Holdings, L…108,749$35.1M0.1%-3,30913F-HRTimelineGroup
Ironvine Capital Partners, LLC107,688$34.8M3.82%+813F-HRTimeline
Gillson Capital LP102,720$33.2M2.72%-86,28013F-HRTimeline
Woodline Partners LP102,369$33M0.12%-154,01213F-HR/ATimeline
LPL Financial LLC102,111$33M0.01%+26,62113F-HRTimeline
Broad Run Investment Management, LLC101,157$32.7M5.75%-5,41013F-HRTimeline
Obermeyer Wealth Partners98,353$31.7M1.46%+1113F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…98,090$31.7M0.07%+44813F-HRTimeline
KLP KAPITALFORVALTNING AS97,952$31.6M0.12%+4,28013F-HRTimeline
APG Asset Management N.V.in group APG Asset Management N.V.112,043$31.4M0.1%-2,16013F-HRTimelineGroup
GATEWAY INVESTMENT ADVISERS LLC96,683$31.2M0.35%+2,98713F-HRTimeline
Asset Management One Co., Ltd.94,239$30.4M0.09%-30613F-HRTimeline
FJARDE AP-FONDEN /FOURTH SWEDISH NATION…93,305$30.1M0.16%+31,94013F-HRTimeline
Onex Canada Asset Management Inc.92,519$29.9M4.97%-27,13613F-HRTimeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…91,374$29.5M0.01%+7,14713F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…90,965$29.4M0.02%-23,83213F-HRTimelineGroup
CAPITOLIS LIQUID GLOBAL MARKETS LLCin group CAPITOLIS LIQUID GLOBAL MARKE…90,429$29.2M0.19%13F-HRTimelineGroup
Summit Trail Advisors, LLC90,234$29.1M0.42%+4,20613F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…89,972$29M0.03%-3,99413F-HRTimelineGroup
Treasurer of the State of North Carolina89,894$29M0.09%+1,91913F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 2 filers holding88,901$28.7M+36,912Timeline
Gotham Asset Management, LLC88,805$28.7M0.09%+7,29613F-HRTimeline
DUDLEY & SHANLEY, INC.88,782$28.7M4.69%013F-HRTimeline
ROYAL LONDON ASSET MANAGEMENT LTD88,381$28.5M0.06%+2,38713F-HRTimeline
Swedbank ABin group Swedbank AB87,464$28.2M0.03%+5513F-HRTimelineGroup
Advisors Capital Management, LLC86,431$27.9M0.33%-3,92213F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…84,942$27.4M0.09%+27913F-HRTimeline
TD Asset Management Inc80,527$26M0.02%+2,36613F-HRTimeline
ASSETMARK, INCin group ASSETMARK, INC80,499$26M0.05%+67,17813F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC80,300$25.9M0.02%-361,98613F-HRTimelineGroup
Central Securities Corp80,000$25.8M2.13%-20,00013F-HRTimeline
SG Americas Securities, LLC78,916$25.5M0.03%-64,24713F-HRTimeline
Mariner, LLCin group Mariner, LLC77,401$25M0.03%+28,78413F-HRTimelineGroup
CIBC Bancorp USA Inc.in group CIBC Bancorp USA Inc.75,189$24.3M0.03%13F-HRTimelineGroup
Mn Services Vermogensbeheer B.V.74,486$24M0.16%-1,20013F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC71,935$23.2M0.05%+66,20713F-HRTimelineGroup
MANAGED ASSET PORTFOLIOS, LLC71,613$23.1M2.77%+13,78213F-HRTimeline
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…70,259$22.7M0.09%-1,03413F-HRTimelineGroup
Lansforsakringar Fondforvaltning AB (pu…69,198$22.3M0.12%+24713F-HRTimeline
CIBC Asset Management Inc68,971$22.3M0.05%-20,62913F-HRTimeline
STRS OHIO68,808$22.2M0.09%+3,22613F-HRTimeline
BANK OF NOVA SCOTIAgroup of 2 filers holding67,799$21.9M+19,732Timeline
Cerity Partners LLCin group Cerity Partners LLC67,369$21.7M0.03%+20,17613F-HRTimelineGroup
Handelsbanken Fonder AB66,913$21.6M0.07%-12113F-HRTimeline
SEB Asset Management AB66,899$21.6M0.09%13F-HRTimeline
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding66,138$21.3M+6,285Timeline
Distillate Capital Partners LLC65,551$21.2M1.11%new13F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT63,005$20.3M0.21%+6,88113F-HRTimeline
JLB & ASSOCIATES INC61,966$20M2.87%-2,94613F-HRTimeline
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.61,730$19.9M0.06%-4,91513F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC61,296$19.8M0.01%-6,34913F-HRTimeline
Tredje AP-fonden61,086$19.7M0.11%+53,37013F-HRTimeline
Public Sector Pension Investment Board61,016$19.7M0.06%+6,27213F-HRTimeline