What is the 13F Pro Quality Score for AON?

13F Pro ranks Aon plc (AON) on the 13F Pro Quality Score, a 0–100 composite of 32 fundamental signals including return on invested capital, free cash flow consistency, balance-sheet strength, earnings quality, growth durability, and valuation discipline. The score refreshes after each 10-K and 10-Q filing on SEC EDGAR. View AON's current score at https://13fpro.ai/company/AON (free sign-up required for the full ranking).

Which hedge funds own the most AON stock?

Based on the most recent Form 13F-HR filings on SEC EDGAR, the largest reported institutional holders of AON include BlackRock,, VANGUARD CAPITAL MANAGEMENT, JPMORGAN CHASE & CO. Holdings are reported quarterly within 45 days of quarter-end and updated on https://13fpro.ai/company/AON as soon as new 13F filings post.

Where does 13F Pro source AON data?

All Aon plc fundamentals and ownership data come directly from SEC EDGAR. Aon plc files with the SEC under CIK 315293. 13F Pro ingests XBRL financial facts from 10-K and 10-Q filings, Form 13F-HR institutional holdings, and Form 4 insider transactions, with no third-party rewrites or estimates.

What sector is AON in?

Aon plc (AON) is classified in the Financials sector. 13F Pro publishes sector-level fund flow analysis and quality leaders at https://13fpro.ai/research/sector/financials.

What drives AON's revenue?

Per Aon plc's latest 10-Q filed with the SEC on 2026-07-29, the biggest revenue drivers are: Risk Capital ($3.0B, +5% YoY); Human Capital ($1.2B, -4% YoY); Commercial Risk Solutions ($2.3B, +5% YoY). Figures are extracted from the filing text and machine-verified against the document. Full breakdown at https://13fpro.ai/company/AON.

What are AON's largest expenses?

Aon plc's latest 10-Q reports these as the largest expense items: Compensation and benefits ($2,271M, -4% YoY); Amortization and impairment of intangible assets ($174M, -13% YoY); Other general expense ($494M, +32% YoY). Sourced directly from SEC EDGAR filing text for Q2 FY2026 (quarter ended June 30, 2026).

How often is AON research updated on 13F Pro?

AON's fundamentals refresh within hours of each new 10-K or 10-Q filing on SEC EDGAR. Institutional ownership updates after each quarterly 13F filing window. Insider transactions update after each Form 4 filing. The 13F Pro Quality Score recalculates after every fundamentals refresh.

Aon plc(AON)Stock Analysis

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Financials →NYSElarge

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SEC EDGAR: CIK 315293 AON stock profile & AI dashboard →

InternationalScored off the official board: an annual-only filer, so this data lags a domestic quarterly filer.

13F Pro Quality Score

75.4/100

Rank #98 of 2,962 stocksTOP 5%

View Financials peers →

Rankings refresh quarterly once 80% of peers have filed (~45 days after quarter-end). Next update: ~Nov 14, 2026.

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Why AON Scores 75/100

exact factor attribution · 2026-09-11

AON's composite is driven by scale and profitability, held back by earnings quality and shareholder dilution. Bars show each factor's exact push vs. a median company, using the same weights the ranking engine applies.

Scale

+8.2 pts

91th pct

Profitability

+7.2 pts

86th pct

Revenue growth

+4.3 pts

66th pct

Capital efficiency

+3.7 pts

78th pct

Free cash flow

+3.2 pts

71th pct

Earnings growth

+1.6 pts

74th pct

Institutional flow

+1.5 pts

73th pct

Shareholder dilution

-1.0 pts

35th pct

Earnings quality

-2.2 pts

28th pct

Factor percentiles are cross-sectional ranks across the ~2,800-stock scored universe, computed from SEC EDGAR filings. Not investment advice.

Unusual Activity in AON

Events flagged as statistical outliers against AON's own multi-year baseline — not fixed dollar thresholds.

Record insider buy2026-09-02
Largest insider buy on record for AON: KNIGHT LESTER B purchased $2,362,074
View source filing →

AON Stock Analysis & AI Quality Score

Data updated 2026-09-11

AI stock analysis and institutional research for Aon plc (AON), a Financials sector company. 13F Pro's AI-powered ranking engine scores AON at 75.4/100 on a 32-signal composite quality model, placing it at rank #98 of 2,962 stocks — the top 5% of the AI-ranked universe. Based on the latest XBRL financial filings (Q2 2026), Aon plc reports quarterly revenue of $4.2B, net income of $551.0M, free cash flow of $483.0M. Top institutional holders of AON by reported 13-F value include BlackRock, VANGUARD CAPITAL MANAGEMENT, JPMORGAN CHASE, based on the most recent SEC filings. AON trades on the NYSE exchange and files with the SEC under CIK 315293. 13F Pro's AI research platform runs 10 specialized AI analysts — value, growth, momentum, macro, and activist specialists — that debate AON daily and publish AI-generated analysis with cited SEC sources. The platform aggregates historical XBRL financial facts, 10-Q and 10-K filings, insider Form 4 transactions, and institutional 13-F holdings for Aon plc directly from SEC EDGAR. Aon plc's 13F Pro composite quality score has ranged between 67 and 78 since 2026, currently 75.4 — an improving long-term trajectory across 48 quarterly and live scoring snapshots.

✦

Fun facts about Aon plc

Quirks, history, and lore behind AON — the kind of stuff that makes a stock memorable.

1
The Basics
A professional services firm · large-cap · listed on the NYSE · headquartered in London with deep roots in the United States.
2
The Numbers
Annual revenue of roughly $13–14 billion and a workforce of over 50,000 people spread across more than 120 countries.
3
The History
Built through decades of mergers and acquisitions, including a landmark deal with Hewitt Associates that made it a global powerhouse in human capital consulting.
4
The Secret
Its business is essentially selling certainty in an uncertain world — the company earns fees helping clients manage risk, retirement, and employee benefits at massive scale.
5
The Lore
It tried to merge with Willis Towers Watson in a deal worth over $30 billion, only to abandon it under antitrust pressure in 2021 — one of the biggest blocked deals of the era.
6
The Giveaway
Its name is on one of the most famous soccer stadiums in North London, and it's the world's second-largest insurance broker — right behind Marsh & McLennan.

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What's Driving AON's Business? Latest 10-Q Breakdown

✓ 20/20 datapoints verified

AI-extracted from Aon plc's 10-Q filed 2026-07-29 — Q2 FY2026 (quarter ended June 30, 2026). Every figure is machine-verified against the filing text on SEC EDGAR.

Aon reported Q2 2026 revenue of $4.2B (+2% YoY) with 5% organic growth; operating income rose to $915M and diluted EPS increased to $8.22 for H1 2026 from $7.10 YoY.

Biggest Revenue Drivers

Risk Capital$3.0B+5% YoY

5% organic revenue growth driven by net new business and strong retention in both Commercial Risk and Reinsurance Solutions.

Human Capital$1.2B-4% YoY

Decline primarily due to sale of NFP Wealth business; organic revenue growth was 5% across Health and Wealth solutions.

Biggest Revenue Drivers

Total revenue: $4.2B+2% YoY

Risk Capital$3.0B+5% YoY

5% organic revenue growth driven by net new business and strong retention in both Commercial Risk and Reinsurance Solutions.

Within Risk Capital

Commercial Risk Solutions$2.3B+5% YoY

Growth in EMEA and North America, highlighted by strong U.S. core P&C and double-digit construction growth.

Reinsurance Solutions$711M+3% YoY

5% organic growth from treaty placements, facultative placements, and Strategy and Technology Group.

Human Capital$1.2B-4% YoY

Decline primarily due to sale of NFP Wealth business; organic revenue growth was 5% across Health and Wealth solutions.

Largest Expense Items

Compensation and benefits$2,271M-4% YoY

Lower expenses from NFP Wealth sale and restructuring savings, partially offset by expenses for organic growth and long-term investments.

Amortization and impairment of intangible assets$174M-13% YoY

Decrease due to lower intangible assets following NFP Wealth business sale.

Other general expense$494M+32% YoY

Increase primarily due to absence of non-recurring gains from prior-year portfolio sales, partially offset by lower NFP Wealth expenses.

Information technology$162M+19% YoY

Increase driven by Aon Business Services investments in ongoing technology initiatives.

Margins: Operating margin improved to 21.5% from 20.7% YoY, driven by 5% organic revenue growth and $25M restructuring savings. Adjusted operating margin increased to 28.9% from 28.2%, reflecting strong organic growth partially offset by technology investments.

Watch Items from the Filing

Vesttoo litigation and regulatory exposure: pending Delaware bankruptcy court complaint and Bermuda regulatory matters related to fraudulent letters of credit; Q4 2023 settlement provisions of $197M with $23M recovery in Q3 2025, exposure remains uncertain.
NFP Wealth divestiture impact: -4% headwind to total revenue from divestitures; Human Capital organic growth masked by 18% reported decline in Wealth Solutions.
Debt maturity schedule: $1.7B short-term debt due within 12 months including $600M 2.850% notes due May 2027, $600M 5.125% notes due March 2027, and $521M 8.205% notes due January 2027.
OECD Pillar Two tax implementation uncertainty: Ireland, U.K., Singapore, and multiple EU member states implementing global minimum tax; potential volatility to effective tax rate in 2026 and beyond.

AI-extracted and verified against SEC EDGAR filing text. Not investment advice.

Read the full 10-Q on SEC EDGAR →Share on X

Revenue

Q2 2026

$4.2B

Net Income

Q2 2026

$551.0M

Free Cash Flow

Q2 2026

$483.0M

ROIC

Q2 2026

14.9%

D/E Ratio

Q2 2026

1.56

Period

Revenue & Net Income

Earnings Per Share

Key Financials Over Time

Export Financial Table · Pro

Revenue

+9.4% YoY

$17.18BFY 2025

FY22 $12.48BFY23 $13.38BFY24 $15.70BFY25 $17.18B

Net Income

+39.2% YoY

$3.69BFY 2025

FY22 $2.59BFY23 $2.56BFY24 $2.65BFY25 $3.69B

Operating Income

+13.3% YoY

$4.34BFY 2025

FY22 $3.67BFY23 $3.79BFY24 $3.83BFY25 $4.34B

EPS (Diluted)

+36.3% YoY

$17.02FY 2025

FY22 $12.14FY23 $12.51FY24 $12.49FY25 $17.02

Total Assets

+3.7% YoY

$50.78BFY 2025

FY22 $32.70BFY23 $33.96BFY24 $48.97BFY25 $50.78B

Total Debt

-10.4% YoY

$15.25BFY 2025

FY22 $10.77BFY23 $11.20BFY24 $17.02BFY25 $15.25B

Op. Cash Flow

+14.7% YoY

$3.48BFY 2025

FY22 $3.22BFY23 $3.44BFY24 $3.04BFY25 $3.48B

Free Cash Flow

+14.2% YoY

$3.22BFY 2025

FY22 $3.02BFY23 $3.18BFY24 $2.82BFY25 $3.22B

Metric	FY 2025	FY 2024	FY 2023	FY 2022	FY 2021	FY 2020
Revenue	$17.18B +9.4%	$15.70B +17.4%	$13.38B +7.2%	$12.48B +2.3%	$12.19B +10.2%	$11.07B
Net Income	$3.69B +39.2%	$2.65B +3.5%	$2.56B -1.0%	$2.59B +106.3%	$1.25B -36.3%	$1.97B
Operating Income	$4.34B +13.3%	$3.83B +1.3%	$3.79B +3.2%	$3.67B +75.6%	$2.09B -24.8%	$2.78B
EPS (Diluted)	$17.02 +36.3%	$12.49 -0.2%	$12.51 +3.0%	$12.14 +118.7%	$5.55 -34.3%	$8.45
Total Assets	$50.78B +3.7%	$48.97B +44.2%	$33.96B +3.8%	$32.70B +2.5%	$31.92B -0.6%	$32.11B
Total Debt	$15.25B -10.4%	$17.02B +51.9%	$11.20B +4.0%	$10.77B +14.7%	$9.39B +21.5%	$7.73B
Operating Cash Flow	$3.48B +14.7%	$3.04B -11.6%	$3.44B +6.7%	$3.22B +47.5%	$2.18B -21.6%	$2.78B
Free Cash Flow	$3.22B +14.2%	$2.82B -11.5%	$3.18B +5.3%	$3.02B +47.8%	$2.04B -22.6%	$2.64B

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Available Research

13F Pro tracks comprehensive data for Aon plc including:

SEC EDGAR filings (10-K, 10-Q, 8-K)

XBRL financial facts (revenue, EPS, margins)

Insider transactions (Form 4)

Institutional 13F holdings

Quality rankings (32 signals)

AI analyst debates & daily meetings

Historical financial trends

Peer comparison & sector analysis

Top Institutional Holders of AON

BlackRock, Inc.
$5.2B15,716,429 sh
VANGUARD CAPITAL MANAGEMENT LLC
$4.5B13,603,465 sh
JPMORGAN CHASE & CO
$4.0B12,175,974 sh
Capital World Investors
$3.9B11,711,650 sh
STATE STREET CORP
$3.1B9,416,039 sh
DODGE & COX
$2.9B8,593,144 sh
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
$2.6B7,615,397 sh
VANGUARD PORTFOLIO MANAGEMENT LLC
$2.4B7,202,991 sh
MORGAN STANLEY
$2.1B6,214,787 sh
GEODE CAPITAL MANAGEMENT, LLC
$1.7B5,180,553 sh

Fund	Value	Shares
BlackRock, Inc.	$5.2B	15,716,429
VANGUARD CAPITAL MANAGEMENT LLC	$4.5B	13,603,465
JPMORGAN CHASE & CO	$4.0B	12,175,974
Capital World Investors	$3.9B	11,711,650
STATE STREET CORP	$3.1B	9,416,039
DODGE & COX	$2.9B	8,593,144
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	$2.6B	7,615,397
VANGUARD PORTFOLIO MANAGEMENT LLC	$2.4B	7,202,991
MORGAN STANLEY	$2.1B	6,214,787
GEODE CAPITAL MANAGEMENT, LLC	$1.7B	5,180,553

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Is AON a good stock to buy?

13F Pro's AI-powered analysis of Aon plc (AON) draws on SEC EDGAR-sourced fundamentals, institutional 13F holdings, and insider Form 4 transactions in the Financials sector (listed on NYSE). The 32-signal AI Quality Score, current rank, and full bull/bear verdict for AON are available on the AON stock profile dashboard — with the same data, AI insights, ratios, and institutional activity refreshed after every 10-K, 10-Q, 13F, and Form 4 filing. AON is classified as a large company.

Which hedge funds own AON?

Institutional investors are required to disclose their holdings quarterly via SEC Form 13F. 13F Pro aggregates these filings to show which hedge funds, mutual funds, and asset managers are buying or selling AON. Combined with insider transaction data from Form 4 filings and AI-powered analysis from 10 specialized research agents, 13F Pro provides a comprehensive view of Aon plc's investment landscape.