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/research/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, Capital World Investors. Holdings are reported quarterly within 45 days of quarter-end and updated on https://13fpro.ai/research/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.

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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13F Pro Quality Score

Not in ranked universe

Pending next ranking run

This company passes all size and coverage filters but hasn't been included in the latest quarterly ranking run. Rankings refresh on Jan 1, Apr 1, Jul 1, Oct 1.

Financial data, filings, and institutional holdings below are still tracked in full — only the proprietary quality composite is unavailable for this name.

AON Stock Analysis & AI Quality Score

AI stock analysis and institutional research for Aon plc (AON), a Financials sector company. AON is not currently included in 13F Pro's AI-ranked quality universe — this company passes all size and coverage filters but hasn't been included in the latest quarterly ranking run. rankings refresh on jan 1, apr 1, jul 1, oct 1. Based on the latest XBRL financial filings (Q1 2026), Aon plc reports quarterly revenue of $5.0B, net income of $1.2B, an operating margin of 34.1%. Top institutional holders of AON by reported 13-F value include BlackRock,, VANGUARD CAPITAL MANAGEMENT, Capital World Investors, 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.

Revenue

Q1 2026

$5.0B

Net Income

Q1 2026

$1.2B

Free Cash Flow

Q1 2026

$363.0M

Operating Margin

Q1 2026

34.1%

D/E Ratio

Q1 2026

1.49

Revenue & Net Income

Earnings Per Share

Key Financials Over Time

Export Financial Table · Pro+

Revenue

+25.8% YoY

$15.70BFY 2024

FY20 $11.07BFY21 $12.19BFY22 $12.48BFY24 $15.70B

Net Income

+2.5% YoY

$2.65BFY 2024

FY20 $1.97BFY21 $1.25BFY22 $2.59BFY24 $2.65B

Operating Income

+4.5% YoY

$3.83BFY 2024

FY20 $2.78BFY21 $2.09BFY22 $3.67BFY24 $3.83B

EPS (Diluted)

+2.9% YoY

$12.49FY 2024

FY20 $8.45FY21 $5.55FY22 $12.14FY24 $12.49

Total Assets

+49.7% YoY

$48.97BFY 2024

FY20 $32.11BFY21 $31.92BFY22 $32.70BFY24 $48.97B

Total Debt

+58.0% YoY

$17.02BFY 2024

FY20 $7.73BFY21 $9.39BFY22 $10.77BFY24 $17.02B

Op. Cash Flow

-5.7% YoY

$3.04BFY 2024

FY20 $2.78BFY21 $2.18BFY22 $3.22BFY24 $3.04B

Metric	FY 2024	FY 2022	FY 2021	FY 2020	FY 2016	FY 2015
Revenue	$15.70B +25.8%	$12.48B +2.3%	$12.19B +10.2%	$11.07B +17.6%	$9.41B -0.7%	$9.48B
Net Income	$2.65B +2.5%	$2.59B +106.3%	$1.25B -36.3%	$1.97B	—	—
Operating Income	$3.83B +4.5%	$3.67B +75.6%	$2.09B -24.8%	$2.78B +53.6%	$1.81B +14.1%	$1.59B
EPS (Diluted)	$12.49 +2.9%	$12.14 +118.7%	$5.55 -34.3%	$8.45 +63.8%	$5.16 +5.7%	$4.88
Total Assets	$48.97B +49.7%	$32.70B +2.5%	$31.92B -0.6%	$32.11B +20.7%	$26.61B -1.0%	$26.88B
Total Debt	$17.02B +58.0%	$10.77B +14.7%	$9.39B +21.5%	$7.73B +18.2%	$6.54B +14.8%	$5.70B
Operating Cash Flow	$3.04B -5.7%	$3.22B +47.5%	$2.18B -21.6%	$2.78B +19.6%	$2.33B +15.8%	$2.01B

AI Insight: AON Financial Trends

Aon's Q1 2026 revenue surged to $5,034M and operating income hit $1,715M, both all-time highs in this dataset, while total debt fell sharply to $14,663M.

• Revenue grew 6.4% year-over-year from $4,729M in Q1 2025 to $5,034M in Q1 2026, continuing an upward trajectory.

• Operating income expanded from $1,461M in Q1 2025 to $1,715M in Q1 2026, implying operating margin improvement quarter-over-quarter.

• Total debt declined meaningfully from $17,632M in Q1 2025 to $14,663M in Q1 2026, a reduction of nearly $3B in four quarters.

• Equity strengthened from $5,860M in Q2 2024 to $9,834M in Q1 2026, reflecting sustained earnings retention and balance sheet improvement.

⚠ Q1 2026 operating cash flow of $430M lags Q1 2025's $140M only slightly but remains well below Q4 2025's $1,397M — seasonality warrants monitoring.

⚠ Net income jumped to $1,693M in Q4 2025 versus $716M in Q4 2024 — verify sustainability as one-time items may be inflating reported earnings.

⚠ Despite debt reduction, absolute leverage at $14,663M remains elevated relative to equity of $9,834M; debt-to-equity still exceeds 1.5x.

AI Insight: AON Ratio Trends

Aon's Q1 2026 operating margin hit 34.1% and ROIC surged to 28.0%, both multi-quarter highs, while leverage fell to its lowest level in the dataset at 1.49x D/E.

• Operating margin expanded from 20.4% in Q3 2025 to 34.1% in Q1 2026, the highest single-quarter reading in the dataset.

• ROIC climbed from 13.2% in Q3 2025 to 28.0% in Q1 2026, nearly doubling over two quarters.

• D/E ratio declined steadily from 3.01 in Q2 2024 to 1.49 in Q1 2026, signaling meaningful deleveraging.

• NPM shows high seasonality: Q4 2025 spiked to 39.4% while Q3 2025 troughed at 11.5%, complicating trend reads.

⚠ Mid-year margins (Q2–Q3) consistently compress sharply; Q2 2026 seasonality could pull ROIC back below 15%.

⚠ Q4 2025 NPM of 39.4% appears outsized versus all other quarters — confirm whether one-off items drove the spike.

⚠ D/E at 1.49x is improving but still elevated; continued deleveraging pace warrants monitoring against acquisition appetite.

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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.
$5.2B16,148,507 sh
VANGUARD CAPITAL MANAGEMENT LLC
$4.4B13,581,756 sh
Capital World Investors
$3.7B11,477,788 sh
STATE STREET CORP
$3.0B9,219,773 sh
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
$2.8B8,358,097 sh
DODGE & COX
$2.6B8,116,095 sh
MORGAN STANLEY
$2.1B6,374,945 sh
GEODE CAPITAL MANAGEMENT, LLC
$1.7B5,244,309 sh
VANGUARD PORTFOLIO MANAGEMENT LLC
$1.5B4,559,035 sh
Bank of New York Mellon Corp
$1.1B3,321,092 sh

Fund	Value	Shares
BlackRock, Inc.	$5.2B	16,148,507
VANGUARD CAPITAL MANAGEMENT LLC	$4.4B	13,581,756
Capital World Investors	$3.7B	11,477,788
STATE STREET CORP	$3.0B	9,219,773
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	$2.8B	8,358,097
DODGE & COX	$2.6B	8,116,095
MORGAN STANLEY	$2.1B	6,374,945
GEODE CAPITAL MANAGEMENT, LLC	$1.7B	5,244,309
VANGUARD PORTFOLIO MANAGEMENT LLC	$1.5B	4,559,035
Bank of New York Mellon Corp	$1.1B	3,321,092

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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.

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.