AON UK LIMITED
Serving as the UK arm of the NYSE-listed professional services group Aon plc, the company provides insurance brokerage, reinsurance, and risk management consulting services.
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Cash
£1.6B
+0.9% vs 2024
Net assets
£1.4B
+10.3% highest in 3 filed years
Employees
4,363
-0.1% vs 2024
Profit before tax
£517M
-1.5% vs 2024
Net assets
3-year trend · vs Financials median
AON UK LIMITED·Financials median
AON UK LIMITED·Financials median
AON UK LIMITED·Financials median
AON UK LIMITED·Financials median
AON UK LIMITED·Financials median
Accounts
3-year trend · Δ = latest vs prior filed period · latest reflected 2025-12-31
| Metric | Trend | 2023-12-31 | 2024-12-31 | 2025-12-31 | Δ vs prior |
|---|---|---|---|---|---|
| Turnover | £1,230,987,000 | £1,255,434,000 | £1,257,207,000 | +0.1% | |
| Operating profit | £452,509,000 | £475,941,000 | £450,719,000 | -5.3% | |
| Profit before tax | £504,979,000 | £524,412,000 | £516,501,000 | -1.5% | |
| Net profit | £404,224,000 | £370,584,000 | £450,774,000 | +21.6% | |
| Cash | £1,903,275,000 | £1,608,871,000 | £1,623,871,000 | +0.9% | |
| Total assets less current liabilities | £1,273,592,000 | £1,368,286,000 | £1,487,953,000 | +8.7% | |
| Net assets | £1,183,079,000 | £1,288,924,000 | £1,421,201,000 | +10.3% | |
| Equity | £1,183,079,000 | £1,288,924,000 | £1,421,201,000 | +10.3% | |
| Average employees | 4,443 | 4,367 | 4,363 | -0.1% | |
| Wages | £328,094,000 | £329,933,000 | £344,407,000 | +4.4% | |
| Directors' remuneration | £5,837,000 | £3,439,000 | £3,785,000 | +10.1% |
Values shown as filed in the company's annual accounts. — indicates the figure wasn't present under that line item in that period. The Δ column is the change from the prior filed period as a percentage of |prior|; lines a company doesn't report show —. About these numbers
Ratios
Computed from the line items above — sparklines read oldest → newest
| Ratio | Trend | 2023-12-31 | 2024-12-31 | 2025-12-31 |
|---|---|---|---|---|
| Operating margin | 36.8% | 37.9% | 35.9% | |
| Net margin | 32.8% | 29.5% | 35.9% | |
| Return on capital employed | 35.5% | 34.8% | 30.3% | |
| Gearing (liabilities / total assets) | 75.9% | 74.7% | 72.3% | |
| Current ratio | 1.18x | 1.12x | 1.16x |
Margins divide P&L lines by turnover. Gearing is liabilities over total assets. Current ratio is current assets over creditors falling due within one year. Interest cover is operating profit over absolute finance costs. Sector-distribution context coming next.
Name history
Renamed 7 times since incorporation
- AON UK LIMITED 2012-04-03 → present
- AON RISK MANAGEMENT SERVICES UK LIMITED 2012-03-30 → 2012-04-03
- AON LIMITED 2000-12-29 → 2012-03-30
- AON GROUP LIMITED 1997-07-01 → 2000-12-29
- ALEXANDER HOWDEN GROUP LIMITED 1985-01-01 → 1997-07-01
- ALEXANDER HOWDEN INSURANCE BROKERS LIMITED 1976-12-31 → 1985-01-01
- ALEXANDER HOWDEN & SWANN LIMITED 1968-10-01 → 1976-12-31
- ALEXR HOWDEN & CO LIMITED 1925-12-29 → 1968-10-01
Audit & accounting basis
- Accounting basis
- FRS 101
- Reporting scope
- Standalone (parent only)
- Auditor
- Ernst & Young LLP
- Audit opinion
- Unqualified (clean)
- Going concern
- Affirmed
“After making enquiries, the Directors have a reasonable expectation that the Company has adequate resources to continue in operational existence for the foreseeable future. Accordingly, the Board continues to adopt the going concern basis in preparing the annual report and financial statements.”
Group structure
- AON UK LIMITED · parent
- McLagan (Aon) Limited 100%
- Aon UK Trustees Limited 100%
- Henderson Insurance Brokers Limited 100%
- Aon Brasil Corretora de Reaseguros Ltda 100%
- Aon Group Venezuela Corretaje de Reaseguros, C.A. 100%
- Aon Peru Corredores de Reaseguros S.A. 100%
- Aon Consulting Limited 100%
- Griffiths & Armour (Holdings) Limited 100%
- Portus Consulting Limited (in members voluntary liquidation) 100%
- Griffiths & Armour Europe Designated Activity Company 100%
- Griffiths & Armour Global Risks Limited 100%
- Griffiths & Armour Insurance Brokers Limited 100%
- Griffiths & Armour Limited 100%
- Griffiths & Armour Professional Risks Limited 100%
- Griffiths & Armour Risk Management Limited 100%
Significant events
- “On 1 January 2025, the Company purchased the Griffiths & Armour Group for a total of £341.2m.”
- “On 1 February 2026, the trade and certain assets of the Griffiths & Armour Partnership, Griffiths & Armour Risk Management Limited and Griffiths & Armour Global Risks Limited were transferred into the Company via a Business Transfer Agreement for £327.9m.”
- “Additionally, the rights to the Griffiths & Armour trade name were transferred from Griffiths & Armour (Holdings) Limited via an Assignment Agreement for £3.3m.”
- “On 1 May 2026 the trade and certain assets of one of the Companies indirect subsidiaries, Griffiths & Armour Europe DAC were sold to Aon Ireland Limited for a total of €9.45m.”
Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers
People
10 active · 90 resigned
Showing the first 100 officers on file — Companies House returns these 100 per page and this record sits at that limit, so the list (and any former officers) may be incomplete. Full register on Companies House
| Name | Role | Appointed | Born | Nationality |
|---|---|---|---|---|
| CLARKE, Dean Leonard | Secretary | 2023-12-19 | — | — |
| AMIRI, Iraj | Director | 2021-02-03 | Feb 1954 | British |
| CHARLES -JONES, Lucinda Claire | Director | 2025-08-28 | Jun 1966 | British |
| COOPER, Kirstine Ann | Director | 2024-06-27 | Aug 1964 | British |
| DAVIES, Neil Richard | Director | 2025-05-01 | Jun 1968 | British |
| JUDD, Carole Ann | Director | 2023-05-02 | Jun 1959 | British |
| KIELTY-O'GARA, Jane Elizabeth | Director | 2024-06-24 | Sep 1976 | British |
| KING, Steven Michael | Director | 2024-12-02 | Apr 1975 | British |
| LAING, Andrew Charles Gordon | Director | 2025-10-10 | Dec 1965 | British |
| WINLOW, Mark | Director | 2024-07-09 | Apr 1962 | British |
Show 90 resigned officers
| Name | Role | Appointed | Resigned |
|---|---|---|---|
| CRUTTWELL, Edward Robert Charles | Secretary | 2008-06-26 | 2010-06-08 |
| DIGNAM, Emma | Secretary | 2023-04-14 | 2023-12-19 |
| HILL, John Lawrence | Secretary | — | 2005-12-31 |
| HOGWOOD, Paul Arthur | Secretary | 2010-06-08 | 2019-06-28 |
| OWEN, Elizabeth Jane | Secretary | 2006-01-01 | 2008-06-26 |
| VERO, Tobias Henry | Secretary | 2019-07-02 | 2023-04-14 |
| ALLEN, Anthony Simon Echalaz | Director | 2010-04-14 | 2014-02-26 |
| AMBROSE, David Charles | Director | 1997-07-01 | 2000-12-31 |
| AMY, Ronald John | Director | 2007-09-27 | 2011-09-30 |
| AMY, Ronald John | Director | 2001-01-01 | 2005-06-30 |
| ATKINS, Richard Charles | Director | 2009-05-01 | 2018-10-24 |
| BAILEY, Marshall Charles | Director | 2023-01-31 | 2023-09-25 |
| BODEN, Anne Elizabeth | Director | 2001-01-01 | 2005-06-30 |
| BOLGER, David | Director | 2005-06-30 | 2007-09-27 |
| BOOTH, Clement Burns | Director | 2004-01-28 | 2005-06-30 |
| BROWN, Robert Iain Cameron | Director | 2009-03-31 | 2014-02-04 |
| BRYAN, Colin Thomas | Director | 2003-01-01 | 2004-12-31 |
| BRYAN, Colin Thomas | Director | 1997-07-01 | 2001-01-01 |
| BRYANT, Stuart Joseph | Director | 2000-01-01 | 2000-12-31 |
| BURNSIDE, Bryan | Director | 1993-11-01 | 1995-12-31 |
| CANTLAY, Charles Peter Thrale | Director | 1997-07-01 | 2001-01-01 |
| CARNEGIE-BROWN, Bruce Neil | Director | 2012-10-29 | 2015-11-04 |
| CHANNELL, Herbert Rocker | Director | 1998-12-17 | 2000-12-31 |
| CHESSHER, Mark Christopher | Director | 2009-01-30 | 2011-04-08 |
| CHILTON, Frederick Paul | Director | 1993-11-01 | 2000-12-31 |
| CHRISTIAN, Dominic Gerard | Director | 2010-04-14 | 2018-07-31 |
| CLARK, Adrian Denis George | Director | 2011-11-10 | 2014-06-18 |
| COLLINS, Gregory Eugene Mary | Director | 2000-06-08 | 2000-12-31 |
| COLLS, Alan Howard Crawfurd | Director | 1997-07-01 | 1997-12-31 |
| CULLEN, John Charles | Director | 2007-10-01 | 2009-01-30 |
| DICKSON, Olivia Catherine | Director | 2006-01-01 | 2009-01-30 |
| DOBBS, Peter Joseph | Director | 2000-01-01 | 2000-12-31 |
| DUDLEY, Richard James | Director | 2014-10-01 | 2022-02-21 |
| EVANS, David Ioan | Director | 1998-01-29 | 1999-05-05 |
| FILLINGHAM, Timothy | Director | 2000-01-01 | 2000-12-31 |
| FORCEY, David John | Director | 1998-04-01 | 2000-12-31 |
| FOX, Stuart Keith | Director | 2001-01-01 | 2005-06-30 |
| FRANKLAND, Nicholas Charles | Director | 2017-11-17 | 2022-09-26 |
| GANDER, Simon Marsland | Director | 2015-06-18 | 2017-09-14 |
| GORE RANDALL, Philip Allan | Director | 2004-01-01 | 2007-09-16 |
| GRIFFIN, Alan Frank | Director | 1996-03-01 | 2000-12-31 |
| GRUPE, Jurgen | Director | 2000-01-01 | 2000-12-31 |
| HALSEY, Alison Margaret | Director | 2015-06-18 | 2021-05-31 |
| HARDMAN, Nicholas John | Director | 2011-04-07 | 2023-05-03 |
| HARMER, Peter Geoffrey | Director | 2007-01-22 | 2009-09-30 |
| HARRISON, Robert Graham | Director | 2001-01-01 | 2003-04-01 |
| HENNESSY, Karl Peter | Director | 2014-03-27 | 2016-09-09 |
| HERBERT, James Neville | Director | 2011-11-10 | 2016-03-31 |
| HOWLAND JACKSON, Anthony Geoffrey Clive | Director | 1997-11-26 | 1999-12-31 |
| ILES, Ronald Alfred | Director | — | 1997-06-12 |
| JACKSON, Keith Thomas | Director | 2016-02-03 | 2017-05-26 |
| JEFFREYS, Simon John Lewis | Director | 2009-05-01 | 2023-02-14 |
| JOHNSTON, John Edward | Director | 2001-01-01 | 2001-03-17 |
| KAVANAUGH, John Lawrence | Director | 1997-07-01 | 1999-12-31 |
| KIMBER, Matthew Paul | Director | 2018-02-27 | 2025-12-11 |
| KNAUDT, Horst | Director | 1997-10-24 | 1999-12-31 |
| LARKIN, Reginald William | Director | — | 1993-11-01 |
| LEDGER, David George | Director | 2008-03-04 | 2018-03-31 |
| MAHONEY, Dennis Leonard | Director | — | 2007-02-28 |
| MANDUCA, Paul Victor Falzon Sant | Director | 2006-01-01 | 2012-09-07 |
| MARJORIBANKS, Francis Nigel | Director | — | 2007-09-28 |
| MCGILL, Stephen Phillip | Director | 2007-01-22 | 2009-01-30 |
| MCKENZIE, Ross Lindsay | Director | 1993-11-01 | 2003-11-11 |
| MEAD, David Stanley | Director | 2007-11-21 | 2009-06-30 |
| MEAD, David Stanley | Director | 2002-09-02 | 2005-06-30 |
| MILTON, Paul Jeffrey | Director | 1997-07-01 | 2000-12-31 |
| MOORE, Rupert James St. Aubyn | Director | 2022-09-26 | 2025-10-10 |
| NELSON, Farah | Director | 2023-05-03 | 2024-08-15 |
| NICHOLSON, John James | Director | 2016-04-20 | 2025-03-31 |
| ORAM, William John | Director | 1993-11-01 | 2000-12-31 |
| OWEN, Elizabeth Jane | Director | 2000-06-08 | 2008-02-26 |
| PAGE, Julie Anne | Director | 2017-07-14 | 2024-06-24 |
| PALMER BROWN, Jonathan Angus David Joseph | Director | 1997-07-01 | 2009-07-09 |
| PETTIGREW, James Neilson | Director | 2012-02-07 | 2014-10-31 |
| PICKERING, Anthony Blatchford | Director | 1997-07-01 | 1998-01-31 |
| PINSENT, Antony Andrew Macpherson | Director | 1997-07-01 | 1999-02-28 |
| POWELL, Roger Charles Jeremy | Director | 2001-01-01 | 2003-04-15 |
| RICHMOND, Carol Ann | Director | 2012-10-15 | 2014-12-31 |
| ROBINSON, Clive George | Director | 2001-02-27 | 2003-06-11 |
| SHANAGHY, Nathan Patrick | Director | 2018-04-01 | 2025-05-01 |
| SMITH, William Blades Berwick | Director | 2000-01-01 | 2000-12-31 |
| STAMP, Philip | Director | 2005-03-01 | 2009-01-30 |
| STEPHENS, Michael John Graham | Director | 2000-01-01 | 2000-12-31 |
| STEWART-BROWN, Brian Trevor | Director | 1997-07-01 | 2003-01-21 |
| STOW, Peter Jeremy John | Director | 1998-04-01 | 2000-12-31 |
| TAYLOR, John Maxwell Percy | Director | 2001-01-01 | 2005-06-30 |
| TORRY, Anne Tracey | Director | 2018-12-28 | 2024-03-31 |
| TUNNICLIFFE, Andrew David | Director | 2016-02-10 | 2017-05-26 |
| TURNER, John Ashley | Director | 1997-07-01 | 2000-12-31 |
| WARNER, Eric David | Director | 1999-09-06 | 2000-12-04 |
Ownership
Persons with significant control
| Name | Kind | Nature of control | Notified | Status |
|---|---|---|---|---|
| Aon Uk Holdings Limited | Corporate entity | Shares 75–100%, Voting 75–100%, Appoints directors | 2016-04-06 | Active |
Filing timeline
Last 20 of 469 total filings
Material constitutional events — rename, articles re-file, resolution
- 2026-05-16 RESOLUTIONS Resolution
- 2026-05-16 MA Memorandum articles
- 2026-05-16 CC04 Statement of companys objects
| Date | Type | Category | Description | |
|---|---|---|---|---|
| 2026-05-31 | AA | accounts | Accounts with accounts type full | |
| 2026-05-16 | RESOLUTIONS | resolution | Resolution | |
| 2026-05-16 | MA | incorporation | Memorandum articles | |
| 2026-05-16 | CC04 | change-of-constitution | Statement of companys objects | |
| 2026-02-03 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2025-12-12 | TM01 | officers | Termination director company with name termination date | |
| 2025-10-20 | AP01 | officers | Appoint person director company with name date | |
| 2025-10-15 | TM01 | officers | Termination director company with name termination date | |
| 2025-08-28 | AP01 | officers | Appoint person director company with name date | |
| 2025-07-24 | AA | accounts | Accounts with accounts type full | |
| 2025-05-01 | AP01 | officers | Appoint person director company with name date | |
| 2025-05-01 | TM01 | officers | Termination director company with name termination date | |
| 2025-04-03 | TM01 | officers | Termination director company with name termination date | |
| 2025-02-04 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2024-12-05 | AP01 | officers | Appoint person director company with name date | |
| 2024-08-19 | AA | accounts | Accounts with accounts type full | |
| 2024-08-16 | TM01 | officers | Termination director company with name termination date | |
| 2024-07-17 | AP01 | officers | Appoint person director company with name date | |
| 2024-07-02 | TM01 | officers | Termination director company with name termination date | |
| 2024-07-02 | AP01 | officers | Appoint person director company with name date |
Public-record activity
Raw counts from Companies House — last 12–24 months
- Filings
- 10
- Capital events
- 0
- Officers appointed
- 2
- Officers resigned
- 2
last 12 months
last 24 months
last 12 months
last 12 months
Direct counts from the register. No score, no rating — see the Filing timeline for the underlying events.