Aon plc number of employees

Headcount by year

What the annual reports say

• As a leading global firm – which is going further, faster to accelerate our Aon United strategy through our 3x3 Plan, which we announced in 2023 – we are focused on attracting, developing and retaining the best talent from all backgrounds, to support our clients and grow our firm. 7 Our Colleagues As of December 31, 2025, we employed approximately 60,000 employees and conducted our operations in m 2025 annual report
• Colleagues As of December 31, 2024, we employed approximately 60,000 employees and conducted our operations in more than 120 countries. 2024 annual report
• Colleagues As of December 31, 2023, we employed approximately 50,000 employees and conducted our operations in more than 120 countries and sovereignties. 2023 annual report
• Colleagues As of December 31, 2022, we employed approximately 50,000 employees and conducted our operations in more than 120 countries and sovereignties. 2022 annual report
• Delivering Aon United is brought to life through our common client value creation model which scales strategies from across the firm to bring the best of Aon to clients. 9 Colleagues As of December 31, 2021, we employed approximately 50,000 employees and conducted our operations in more than 120 countries and territories. 2021 annual report

Headcount as the company states it in Item 1 of its annual report (some count full-time equivalents or exclude part-time and temporary staff), at the date it gives. Years where the report states no clear total are left out rather than estimated. Changes can reflect acquisitions and disposals as well as hiring and job cuts.