Aon layoffs, on the record
Every job cut, severance charge and restructuring Aon reported in its annual reports, 2023 to 2025, quoted from the filings. Headcount went from approximately 50,000 to approximately 60,000.
Headcount, as reported
| Annual report | Employees | As of |
|---|---|---|
| 10-K for 2023 | approximately 50,000 | December 31, 2023 |
| 10-K for 2024 | approximately 60,000 | December 31, 2024 |
| 10-K for 2025 | approximately 60,000 | December 31, 2025 |
Job cuts, severance and restructuring
Our summaryInitiated a three-year restructuring program, the Accelerating Aon United Program, to streamline technology, optimize leadership structure and resource alignment, and reduce the real estate footprint.
Word for word“In 2023, we initiated a three-year restructuring program, Accelerating Aon United Program (the “Program”).” 10-K for 2023
Our summaryRecorded restructuring charges for the program covering workforce optimization, asset impairments, and technology and other costs.
Word for word“Accelerating Aon United Program expenses were $135 million in 2023, reflecting restructuring charges associated with the Program announced in the third quarter of 2023, relating to workforce optimization, asset impairments, and technology and other costs.” 10-K for 2023
Our summaryThe program includes headcount reduction costs, technology-related costs, and asset impairment costs including real estate consolidation.
Word for word“The Program will include technology-related costs to facilitate streamlining and simplifying operations, headcount reduction costs, and costs associated with asset impairments, including real estate consolidation costs.” 10-K for 2023
Our summaryAon initiated a three-year restructuring program, the Accelerating Aon United Program, to streamline technology, optimize leadership structure and resource alignment, and reduce real estate footprint.
Word for word“In the third quarter of 2023, Aon initiated a three-year restructuring program called the Accelerating Aon United Program with the purpose of streamlining the Company’s technology infrastructure, optimizing its leadership structure and resource alignment, and reducing the real estate footprint to align to its hybrid working strategy.” 10-K for 2024
Our summaryThe Program's restructuring charges include workforce optimization costs, technology and other costs, and asset impairments.
Word for word“Accelerating Aon United Program expenses were $389 million in 2024 compared to $135 million in 2023, reflecting restructuring charges associated with the AAU Program announced in the third quarter of 2023, relating to workforce optimization, technology and other costs, and asset impairments.” 10-K for 2024
Our summaryAon reported restructuring savings from the Accelerating Aon United actions and reduced its real estate footprint to align with its hybrid working strategy.
Word for word“Operating expenses increased $2.3 billion, or 24%, to $11.9 billion in 2024 due primarily to the inclusion of NFP’s operating expenses, an increase in expense associated with 6% organic revenue growth, Accelerating Aon United restructuring charges, and transaction and integration costs, partially offset by $110 million of restructuring savings.” 10-K for 2024
Our summaryAon expects non-recurring NFP integration costs that include colleague severance and retention bonuses; it recognized $95 million of integration costs in 2024.
Word for word“Aon incurred $95 million of integration costs in 2024.” 10-K for 2024
Our summaryAon started a three-year restructuring program, the Accelerating Aon United Program, to streamline technology, optimize leadership structure and resource alignment, and shrink its real estate footprint.
Word for word“In the third quarter of 2023, we initiated a three-year restructuring program called Accelerating Aon United Program (the “Program” or the “AAU Program”) with the purpose of streamlining our technology infrastructure, optimizing our leadership structure and resource alignment, and reducing the real estate footprint to align to our hybrid working strategy.” 10-K for 2025
Our summaryAon recorded restructuring charges for the AAU Program in 2025, covering workforce optimization, technology and other costs, and asset impairments.
Word for word“Accelerating Aon United Program expenses were $365 million in 2025 compared to $389 million in 2024, reflecting restructuring charges associated with the AAU Program announced in the third quarter of 2023, relating to workforce optimization, technology and other costs, and asset impairments.” 10-K for 2025
Our summaryAon reported integration costs from the NFP acquisition, including colleague severance, in 2025 and 2024.
Word for word“Aon incurred $77 million and $95 million of integration costs in the twelve months ended December 31, 2025 and 2024, respectively.” 10-K for 2025
| Fiscal year ended | Restructuring charges | Restructuring costs incurred | Cash paid for restructuring |
|---|---|---|---|
| 2017-12-31 | — | $497 million | — |
| 2018-12-31 | $485 million | — | — |
| 2019-12-31 | $451 million | — | — |
| 2020-12-31 | $0 | — | $127 million |
| 2021-12-31 | $0 | — | — |
| 2022-12-31 | $0 | — | — |
| 2023-12-31 | $135 million | — | — |
| 2024-12-31 | $389 million | — | — |
| 2025-12-31 | $365 million | — | — |
Aon has filed no restructuring notice (Form 8-K, Item 2.05) since 2016. Companies file one only for a cut they judge material, so many announced layoffs never appear as one. This page shows what the company reported to the SEC, not news reports or state layoff notices.
Read from Aon’s annual reports (10-K for 2025, 10-K for 2024, 10-K for 2023) and the financial data it files with the SEC, as of 2026-02-13. Every quotation is word for word from the filing linked beside it; how these pages are built and checked. The full record is in its company data sheet.