How many subsidiaries does Aon plc file with the SEC?

830, listed in its most recent exhibit 21. They are incorporated across 65 jurisdictions, led by Argentina, Australia, Austria. 55 of them sit in offshore financial centres. That exhibit is filed with the company's annual report and is the company's own list, not an estimate.

Is Aon plc financially healthy?

Aon plc scores 6 out of 8 on the Piotroski F-score. Only 8 of the nine tests could be computed from what it filed; the rest need a prior year it has not reported. Its Altman Z-score puts it in the distress zone. Every test and the numbers behind it are shown above, so the arithmetic is checkable rather than something you have to take on trust.

Who are the largest institutional holders of Aon plc?

Among the managers tracked here, the biggest positions as of the 2026-Q2 13F filings are BlackRock, Inc. (trimming), JPMORGAN CHASE & CO (adding), Capital World Investors (adding). Direction is the change in share count against that manager's own previous filing; managers with no prior filing are left out rather than counted as new buyers.

Aon plc (AON)

NYSE · Common Stock · Insurance Agents, Brokers & Service

One email a week from me: what it filed, which 13F holders added or cut, where its scores stand. Free.

British multinational corporation

Corporate structure

830 entities across 65 jurisdictions, 55 in offshore financial centres. Read directly from the company’s own 10-K EX-21 filed 2026-02-13 — see the exhibit.

Which other public companies file entities in the same places:

United States358 United Kingdom94 Canada33 Ireland31 Netherlands27 Australia21 Singapore17 Germany14 Bermuda12 Luxembourg11 United Arab Emirates11 Mexico10

Subsidiaries of Aon plc as disclosed in its SEC filing
Entity	Jurisdiction	Note
Admiseg S.A.	Argentina
Aon Argentina Corredores de Reaseguros S.A.	Argentina
Aon Risk Services Argentina S.A.	Argentina
Aon Soluciones S.A.	Argentina
Asevasa Argentina S.A.	Argentina
Marinaro Dundas S.A.	Argentina
SN Re S.A.	Argentina
Swire Blanch MSTC II S.A.	Argentina
Swire Blanch MSTC S.A.	Argentina
Affinity Risk Partners (Brokers) Pty Ltd	Australia
Aon Advisory Australia Pty Limited

Financial health

Two standard screens, computed from the XBRL in FY2025 against FY2024. Every test shows the numbers behind it — a score with its inputs hidden is a number you cannot check.

Piotroski F-score

6 / 8

PASSReturn on assets positiveROA 7.3%
PASSOperating cash flow positiveOCF 3.5B
PASSReturn on assets improving5.4% → 7.3%
FAILCash flow exceeds earningsOCF 3.5B vs NI 3.7B
PASSLong-term debt ratio falling33.2% → 28.9% of assets
PASSCurrent ratio improving1.02 → 1.11
FAILNo share dilution213M → 217M shares
FAILGross margin improvingno gross profit reported
PASSAsset turnover improving0.32× → 0.34×

Altman Z-score

1.52distress

Bankruptcy-risk screen combining working capital, retained earnings, operating income, market value against liabilities, and asset turnover. Above 2.99 is the safe zone; below 1.81 is distress.

Six-year record

Year	Revenue	Net income	Free cash flow	Gross margin	Shares
FY2020	$11.1B	$2.0B	$2.6B	—	233,100,000
FY2021	$12.2B	$1.3B	$2.0B	—	226,100,000
FY2022	$12.5B	$2.6B	$3.0B	—	213,200,000
FY2023	$13.4B	$2.6B	$3.2B	—	205,000,000
FY2024	$15.7B	$2.7B	$2.8B	—	212,500,000
FY2025

Ownership flow

16 institutions tracked — 10 added, 5 reduced, 1 opened a new position, 2 sold out. Active managers added 9,485,243 shares while index money cut 299,568.

Institutional holders of Aon plc and their share-count change
Manager	Kind	Shares	Change	Value
JPMORGAN CHASE & CO	Active fund	12,225,974	+6,527,943	$4.0B
PRICE T ROWE ASSOCIATES INC /MD/	Active fund	3,136,640	+1,855,714	$1.0B
AQR CAPITAL MANAGEMENT LLC	Hedge fund	1,905,800	+926,045	$623.0M
BlackRock, Inc.	Index	15,716,429

Identity

CIK: 0000315293
LEI: 549300KJ06GHJLM4Z895
FIGI: BBG00SSQFPK6
SIC: 6411 · Insurance Agents, Brokers & Service
Incorporated: Ireland
Headquarters: DUBLIN 2, Ireland
Employees: 65,000 (2012)
Founded: 1982-00-00

Ownership

Institutional: 93.2%
Institutions: 1,746
Insiders: 1.0%

Ownership percentages are a vendor aggregate, not a filing — unlike everything else on this page.

Other insurance agents, brokers & service companies

Aon plc files under SIC 6411 — all 11 insurance agents, brokers & service companies compared on assets and F-score.

Equitable Holdings, Inc.EQH Arthur J. Gallagher & Co.AJG MARSH & MCLENNAN COMPANIES, INC.MRSH BROWN & BROWN, INC.BRO WILLIS TOWERS WATSON PLCWTW RYAN SPECIALTY HOLDINGS, INC.RYAN

Questions about Aon plc

How many subsidiaries does Aon plc file with the SEC?: 830, listed in its most recent exhibit 21. They are incorporated across 65 jurisdictions, led by Argentina, Australia, Austria. 55 of them sit in offshore financial centres. That exhibit is filed with the company's annual report and is the company's own list, not an estimate.
Is Aon plc financially healthy?: Aon plc scores 6 out of 8 on the Piotroski F-score. Only 8 of the nine tests could be computed from what it filed; the rest need a prior year it has not reported. Its Altman Z-score puts it in the distress zone. Every test and the numbers behind it are shown above, so the arithmetic is checkable rather than something you have to take on trust.
Who are the largest institutional holders of Aon plc?: Among the managers tracked here, the biggest positions as of the 2026-Q2 13F filings are BlackRock, Inc. (trimming), JPMORGAN CHASE & CO (adding), Capital World Investors (adding). Direction is the change in share count against that manager's own previous filing; managers with no prior filing are left out rather than counted as new buyers.

This page is one panel of the terminal

The structure map above is the Corporate Blueprint, and in the desktop it is interactive — click any entity to re-centre the map on it and walk the ownership chain. It sits alongside the screener, the scorecard and the filings lab on one desk, on your machine.

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Sourced from SEC EDGAR primary filings. Figures are as reported by the company and are not investment advice. Scores are standard published screens computed from those filings; every input is shown above so you can check the arithmetic.