Aon plc (AON) Institutional Ownership

Ownership Summary

The institutional landscape for Aon plc (NYSE:AON) includes 77 filers as of the latest reporting cycle ending December 2025.

• The percentage of Aon owned by institutions changed from 85.3% in September 2025 to 0.3% in December 2025, marking a slight down trend.
• Institutional share ownership changed by -12.87% QoQ, while the number of institutional owners saw a decrease of 93.37% YoY.
• During the quarter, 31 institutions bought more Aon shares, 28 sold shares, and 18 of the 77 total investors held their position steady.
• The total number of shares held by institutions in Aon decreased to 678.02K as of December 2025, a net change of down by 100.18K shares quarter on quarter, and down 192.14Mn shares year over year.
• With 269.36K shares, DAVENPORT & Co LLC commands the largest institutional position in Aon as of December 31, 2025, equating to 0.12% of the company.
• Among the most significant buyers of Aon during December 2025 were SG Americas Securities, LLC (134.94K), Murphy, Middleton, Hinkle & Parker, Inc. (12.20K), TABR Capital Management, LLC (3.62K), Quantum Financial Advisors, LLC (2.53K), Czech National Bank (1.91K).
• Leading sellers of Aon stock in December 2025 included Assenagon Asset Management S.A. (251.76K), Grove Bank & Trust (3.02K), DAVENPORT & Co LLC (2.53K), NORDEN GROUP LLC (1.52K), GAMMA Investing LLC (978).
• The top 10 institutional holders of Aon for the quarter ending December 2025 included DAVENPORT & Co LLC (269.36K), SG Americas Securities, LLC (143.16K), Czech National Bank (56.68K), CARDEROCK CAPITAL MANAGEMENT INC (22.44K), NORDEA INVESTMENT MANAGEMENT AB (19.98K), Avanza Fonder AB (18.96K), Diversified Trust Co (13.19K), Murphy, Middleton, Hinkle & Parker, Inc. (12.20K), ANDERSON HOAGLAND & CO (9.73K), Assenagon Asset Management S.A. (6.89K).