AON Aon plc
Aon plc (AON) Institutional Ownership
What the institutions did with AON last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 15.7M | 8.1% |
| VANGUARD CAPITAL MANAGEMENT LLC | 13.6M | 7.1% |
| JPMORGAN CHASE & CO | 12.2M | 6.3% |
| Capital World Investors | 11.7M | 6.1% |
| STATE STREET CORP | 9.4M | 4.9% |
| Dodge & Cox | 8.6M | 4.5% |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 7.6M | 3.9% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7.2M | 3.7% |
| MORGAN STANLEY | 6.2M | 3.2% |
| GEODE CAPITAL MANAGEMENT, LLC | 5.2M | 2.7% |
| Bank of New York Mellon Corp | 3.2M | 1.7% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 3.1M | 1.6% |
| NORGES BANK | 2.8M | 1.4% |
| Mitsubishi UFJ Asset Management Co., Ltd. | 2.8M | 1.4% |
| Independent Franchise Partners LLP | 2.6M | 1.4% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 2.6M | 1.4% |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 2.3M | 1.2% |
| Boston Partners | 2.1M | 1.1% |
| NORTHERN TRUST CORP | 2.0M | 1.1% |
| AQR CAPITAL MANAGEMENT LLC | 1.9M | 1.0% |
| WCM INVESTMENT MANAGEMENT, LLC | 1.9M | 1.0% |
| Artisan Partners Limited Partnership | 1.9M | 1.0% |
| GOLDMAN SACHS GROUP INC | 1.7M | 0.9% |
| NEUBERGER BERMAN GROUP LLC | 1.7M | 0.9% |
| BANK OF AMERICA CORP /DE/ | 1.6M | 0.8% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| JPMORGAN CHASE & CO | Increased | 5.6M | 12.2M | +6.5M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 4.6M | 7.2M | +2.6M |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 1.3M | 3.1M | +1.9M |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Increased | 797.4K | 2.6M | +1.8M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Reduced | 1.3M | 25.7K | -1.2M |
| POLEN CAPITAL MANAGEMENT LLC | Reduced | 1.4M | 164.0K | -1.2M |
| FARALLON CAPITAL MANAGEMENT LLC | Reduced | 2.5M | 1.4M | -1.1M |
| Cantillon Capital Management LLC | Sold Out | 1.1M | 0 | -1.1M |
| AQR CAPITAL MANAGEMENT LLC | Increased | 979.8K | 1.9M | +926.0K |
| Sustainable Growth Advisers, LP | Reduced | 1.1M | 242.3K | -809.5K |
| PineStone Asset Management Inc. | New | 0 | 799.3K | +799.3K |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | Reduced | 8.4M | 7.6M | -742.7K |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | Reduced | 2.9M | 2.3M | -692.6K |
| Amundi | Reduced | 1.5M | 993.7K | -509.2K |
| Southpoint Capital Advisors LP | Sold Out | 500.0K | 0 | -500.0K |
| Dodge & Cox | Increased | 8.1M | 8.6M | +477.0K |
| Vontobel Holding Ltd. | Reduced | 999.2K | 540.8K | -458.4K |
| OMERS ADMINISTRATION Corp | Reduced | 567.5K | 135.3K | -432.2K |
| BlackRock, Inc. | Reduced | 16.1M | 15.7M | -432.1K |
| EAGLE CAPITAL MANAGEMENT LLC | Reduced | 463.4K | 45.0K | -418.4K |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | Reduced | 547.9K | 130.3K | -417.6K |
| Invesco Ltd. | Reduced | 1.5M | 1.1M | -417.3K |
| AMERIPRISE FINANCIAL INC | Reduced | 1.1M | 692.8K | -387.9K |
| DIAMOND HILL CAPITAL MANAGEMENT INC | Reduced | 1.5M | 1.1M | -373.7K |
| Assenagon Asset Management S.A. | Increased | 8.2K | 377.6K | +369.4K |
| Prana Capital Management, LP | Sold Out | 323.5K | 0 | -323.5K |
| MILLENNIUM MANAGEMENT LLC | Increased | 20.0K | 312.2K | +292.2K |
| Wealthspire Advisors, LLC | Reduced | 984.1K | 726.4K | -257.7K |
| Mitsubishi UFJ Asset Management Co., Ltd. | Increased | 2.5M | 2.8M | +237.3K |
| Capital World Investors | Increased | 11.5M | 11.7M | +233.9K |
| VESTOR CAPITAL, LLC | Increased | 1.8K | 210.6K | +208.9K |
| Longview Partners (Guernsey) LTD | Reduced | 976.3K | 769.0K | -207.3K |
| Artisan Partners Limited Partnership | Increased | 1.6M | 1.9M | +206.5K |
| BARCLAYS PLC | Reduced | 600.6K | 394.1K | -206.4K |
| STATE STREET CORP | Increased | 9.2M | 9.4M | +196.3K |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Reduced | 291.3K | 97.7K | -193.6K |
| COMGEST GLOBAL INVESTORS S.A.S. | Increased | 628.7K | 820.3K | +191.6K |
| FIDUCIENT ADVISORS LLC | Reduced | 183.3K | 15.1K | -168.2K |
| NEUBERGER BERMAN GROUP LLC | Reduced | 1.9M | 1.7M | -166.1K |
| GOLDMAN SACHS GROUP INC | Increased | 1.6M | 1.7M | +164.8K |
| MORGAN STANLEY | Reduced | 6.4M | 6.2M | -160.2K |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | Increased | 222.2K | 380.4K | +158.2K |
| Verition Fund Management LLC | Increased | 228.2K | 385.0K | +156.8K |
| CI INVESTMENTS INC. | Increased | 1.1K | 156.1K | +155.0K |
| Zurich Insurance Group Ltd/FI | Sold Out | 148.3K | 0 | -148.3K |
| M.D. Sass, LLC | Sold Out | 142.4K | 0 | -142.4K |
| PFA Pension, Forsikringsaktieselskab | Increased | 6.8K | 145.1K | +138.3K |
| Boston Partners | Increased | 2.0M | 2.1M | +134.7K |
| ROYAL BANK OF CANADA | Reduced | 688.1K | 554.7K | -133.4K |
| Fiera Capital Corp | Reduced | 550.3K | 419.3K | -131.0K |
| Bank of New York Mellon Corp | Reduced | 3.3M | 3.2M | -129.9K |
| Russell Investments Group, Ltd. | Increased | 262.9K | 388.1K | +125.2K |
| Gillson Capital LP | Increased | 102.7K | 221.6K | +118.9K |
| JONES FINANCIAL COMPANIES LLLP | Increased | 259.0K | 375.5K | +116.5K |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | Reduced | 159.4K | 45.7K | -113.7K |
| Veritas Asset Management LLP | Reduced | 1.5M | 1.4M | -112.2K |
| NATIXIS ADVISORS, LLC | Increased | 341.9K | 448.0K | +106.1K |
| Mawer Investment Management Ltd. | Reduced | 1.3M | 1.2M | -105.5K |
| California Public Employees Retirement System | Reduced | 475.9K | 370.8K | -105.1K |
| FIRST TRUST ADVISORS LP | Increased | 27.7K | 131.0K | +103.3K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.