InvestorLens

AON — AON PLC

Financial Services · Insurance Brokers

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For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

Why are billionaires buying AON?

Built from public SEC filings and public economic data. Not a recommendation.

Confidence
57
Institutional Conviction
Net distribution · 3 buying vs 4 selling last quarter
36
Macro Tailwind
Macro conditions are mixed for this sector
56
Congressional Activity
1 congressional purchase, 0 sales disclosed in the last 6 months
Why? — Evidence & Confidence ▾

Of 7 tracked investors who changed their AON position last quarter, 3 bought and 4 sold (43% buy-side). Macro conditions are mixed for this sector (Macro Tailwind 56/100 in a Overheat regime). 1 congressional purchase, 0 sales disclosed in the last 6 months.

Supporting evidence
  • +3 tracked investors added or increased positions last quarter (Andreas Halvorsen, Izzy Englander, Ken Griffin)
  • +6 tracked investors reported holding AON at their latest filing
  • +Macro Health is 56/100 in a Overheat regime — historically acceptable for Financial Servicessource
Contradicting evidence — always shown
  • −4 tracked investors reduced or exited last quarter (3 reduced, 1 sold out)
  • −13F data is disclosed up to 45 days after quarter end — positions may have changed since
Know the limits
  • · 13F disclosure lag (up to 45 days)
  • · Tracked investors are a sample, not the whole market
  • · Sector regime fit is a historical average, not a guarantee

Every InvestorLens score shows its evidence — including what argues against it. Model conviction-v1 · generated 9/18/2026.

About AON PLC (AON)

AON PLC (AON) appears in the most recent 13F filings of 6 tracked institutional investors. AON PLC is classified in the Financial Services sector (Insurance Brokers industry). The largest disclosed position is held by Warren Buffett (Berkshire Hathaway), valued at $1.6B. Across recent filings, tracked investors recorded 10 new positions, 19 increased, 18 reduced, and 5 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in AON

56
/100
Mixed Activity
Added / Increased29
Reduced18
Exited5
BearishBullish
Crowded Trade Score™

How many top investors track AON

40
/100
Moderate Interest
6investors

Several tracked investors have exposure.

UndiscoveredCrowded
151015+

AON Ownership Composition

How AON PLC is held across tracked investor types, based on reported 13F positions.

Dominant Type
Other
48% of tracked value
Institutions
6
tracked investors
Total Reported
$802.4M
combined 13F value
Types4
  • Other47.6%
  • Value & Distressed28.4%
  • Multi-Strategy / Quant21.3%
  • Macro2.7%
Other(1)
47.6%
Value & Distressed(1)
28.4%
Multi-Strategy / Quant(2)
21.3%
Macro(2)
2.7%

Tracked investors currently reporting AON

2 tracked investors have since exited this position — listed separately below.

  • Andreas HalvorsenJun 30, 2026
    Viking Global Investors
    Shares
    1.2M
    Value
    $381.9M
    % Portfolio
    1.09%
  • Seth KlarmanJun 30, 2026
    Baupost Group
    Shares
    687K
    Value
    $227.9M
    % Portfolio
    4.21%
  • Izzy EnglanderJun 30, 2026
    Millennium Management
    Shares
    344K
    Value
    $114.1M
    % Portfolio
    0.04%
  • Ken GriffinJun 30, 2026
    Citadel Advisors
    Shares
    171.7K
    Value
    $56.9M
    % Portfolio
    0.01%
  • Paul Tudor JonesJun 30, 2026
    Tudor Investment Corp
    Shares
    49.5K
    Value
    $16.4M
    % Portfolio
    0.02%
  • Ray DalioJun 30, 2026
    Bridgewater Associates
    Shares
    15.7K
    Value
    $5.2M
    % Portfolio
    0.02%

Previously held AON

These investors reported AON in an earlier quarter but not in their most recent 13F. Figures below are their last reported position, not a current holding.

InvestorFirmLast reported sharesValue thenLast held
Warren BuffettBerkshire Hathaway4.1M$1.5BJun 30, 2025
Steve CohenPoint72 Asset Management33.3K$10.7MMar 31, 2026

Recent activity

Frequently asked questions

How many institutional investors hold AON?
6 tracked institutional investors disclosed a position in AON (AON PLC) in their most recent 13F filing.
Who is the largest institutional holder of AON?
Warren Buffett, Berkshire Hathaway, holds the largest disclosed position in AON, valued at $1.6B.
Did institutional ownership of AON increase or decrease?
Across recent 13F filings, tracked investors recorded 10 new positions, 19 increased, 18 reduced, and 5 fully exited AON.
What sector is AON in?
AON PLC is classified in the Financial Services GICS sector, Insurance Brokers industry.
Where does this AON ownership data come from?
SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.
AON (AON PLC) — Institutional Holders & 13F History — InvestorLens