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Aon: which funds own it

Financials →Data as of Jun 30, 2026 (Q2 2026) · updated on Nov 5, 2026

A 13F shows the portfolio at quarter-end and is filed up to 45 days later: these are not real-time positions and they may have changed.

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34 concentrated managers hold it (−2 vs last quarter) with a median weight of 3.7%. 1 officer or director bought in 6 months.

Who owns Aon?

Holders reporting more than 5% of the shares to the SEC (Schedules 13D/13G): Vanguard Capital Management, 7.3% (13G filed Apr 29, 2026) and JPMorgan Chase, 6.7% (13G/A filed Oct 16, 2026). As of Jun 30, 2026, the largest holders reported on Form 13F were BlackRock (7.4% of the shares), Vanguard Capital Management (6.4%) and JPMorgan Chase (5.7%).

Which institutions hold the most Aon shares?

Per Form 13F filings as of Jun 30, 2026, as a share of all shares outstanding:

  1. 1. BlackRock: 7.4%
  2. 2. Vanguard Capital Management: 6.4%
  3. 3. JPMorgan Chase: 5.7%
  4. 4. Capital World Investors: 5.5%
  5. 5. State Street: 4.4%
  6. 6. Dodge & Cox: 4.0%
  7. 7. Massachusetts Financial Services: 3.6%
  8. 8. Vanguard Portfolio Management: 3.4%
  9. 9. Morgan Stanley: 2.9%
  10. 10. Geode Capital Management: 2.4%

How much of Aon do institutions own?

The 1,263 institutions that file 13F reported 90.1% of the shares as of Jun 30, 2026 (not counting 2 positions with implausible figures).

Sources:13G by Vanguard Capital Management (Apr 29, 2026) ↗13G/A by JPMorgan Chase (Oct 16, 2026) ↗All of the company's proxy statements on EDGAR ↗

13F percentages divide the shares each institution reports by the shares outstanding on the cover of the company's latest report before the quarter end (Apr 30, 2026). Entities of the same group file separately and are not added up. We hold 13D and 13G filings made since Dec 23, 2024: a holder above 5% that has not filed since then does not appear here.

Aon revenue

Aon reported annual revenue of $17.18 billion for fiscal year 2025 (year ended December 31, 2025), according to its Form 10-K filed with the SEC (XBRL data).

Well-known investors holding it

Seth Klarman 13F (Q2 2026)Andreas Halvorsen 13F (Q2 2026)Tom Gayner 13F (Q2 2026)

Concentrated managers
34
All 13F: 1,263
Consensus
29/100
across 34 concentrated managersRanks by accumulation, portfolio weight and number of managers; it does not say more are buying than selling.
Price at Jun 30, 2026 (per 13F)
$331.69
+2.8% in the quarter · reported value ÷ shares, not the quote · See current quote ↗

Quarter flow (concentrated managers)

Change in managers (36 → 34): 2 opened · 4 exited = −2

Net flow in the quarter: −$842M (−2.5 M shares) · bought $377M and sold $1.2 bnShares concentrated managers added minus those they cut, valued at the 13F quarter-end implied price, not each trade's price. It is a different measure from the change in managers: the two can have opposite signs.

The set of concentrated managers changed between quarters: with the set as it was then, 38 held it last quarter (the chart point); with today's set, 36 (the base for the change).

Concentrated managers holding it

Up to 15, sorted by position value. The percentage is the weight in each manager's portfolio.

Other relevant holders

Filers with $100M or more in the stock that do not count as concentrated managers because of their type: they are left out of the counts, the consensus and the accumulation.

Largest holders of AON (all 13F filers)

The 10 13F filers with the most shares as of Jun 30, 2026, whatever their type (index firms usually come first). “Change”: shares added or cut versus the previous quarter, split-adjusted; “no data” = there is no comparable portfolio for the previous quarter (no filing, or a filing with its holdings under confidential treatment). “% of the company” only where shares outstanding are up to date. Entities of the same group file separately and some 13F filings include other managers: there may be double counting. With a free account: the top 25, the largest buyers and the largest sellers.

Held by institutions (13F)

Institutions (13F): 90.1% of the shares · top 10: 45.6% · in index firms: 31.0% of the institutional total

Share of the stock held by 13F filers

Q2 2026: 90.1%

90.1%84.4%
Q3 2021Q2 2026

Shares reported by the 1,263 13F filers as of Jun 30, 2026 (not counting 2 positions with implausible figures), divided by the shares outstanding on the cover of the company's latest report (Apr 30, 2026). It is not all institutional ownership: only managers above $100M file a 13F, and it excludes short positions. Entities of the same group file separately and some 13F filings include other managers: there may be double counting. We only publish it where the figure is credible: not for ADRs, companies with more than one share class or stale shares-outstanding data.

Fundamentals

12-month figures to Sep 30, 2026 · balance sheet as of Sep 30, 2026.

Profitability
Operating margin
26.3%
Net margin
22.2%
ROE
38.9%
Growth
Revenue (TTM)
$17.7 bn
Revenue growth
3.8%
Net income (TTM)
$3.9 bn
Balance sheet
Net debt / EBITDA
2.6x
Free cash flow (TTM)
$3.3 bn
Quality vs sector
54/100

Figures from the statements the company filed with the SEC (10-K, 10-Q). Free cash flow = operating cash flow − capital expenditures; empty if the company does not report capex. “Quality vs sector”: 0 to 100, the average of its percentiles in ROE, operating margin, free-cash-flow margin, revenue and earnings growth and net debt / EBITDA (at least 3 needed) against companies in its sector above $300M. How each figure is calculated

Shares outstanding: buybacks and dilution

Diluted shares by fiscal year (split-adjusted)

2025: 217.1 M

270.3 M0
20162025
1 year
+2.2%
3 years
+1.8%
5 years
−6.9%
Buybacks (FY 2025)
$1.0 bn
Share issuance
$70.0M
Stock-based compensation
$432M2.5% of revenue
Dividends paid
$629M

From the statements the company filed with the SEC (10-K). The change compares average diluted shares of each fiscal year, on today's basis: negative = it bought back more than it issued; positive = dilution. “No data” = the company does not report that item under a tag we can read; it does not mean zero.

Earnings quality and debt

Operating cash flow ÷ net income (12 months)
0.91
Interest coverage (operating income ÷ interest)
5.3 timesfiscal 2025
Debt due within 12 months
$1.7 bn0.11 times cash and investments
Debt maturities by year (note as of Dec 31, 2025)
  • Year 1$589M
  • Year 2$1.7 bn
  • Year 3$352M
  • Year 4$1.8 bn
  • Year 5$1.0 bn
  • Later$10.0 bn

From the figures the company filed with the SEC. Cash flow over net income near or above 1 means earnings are collected in cash; far below, that part is accounting. Coverage says how many times operating income pays the latest fiscal year's interest. Maturities come from the debt note of the latest annual report, counted from its closing date. “No data” never means zero.

Insiders (Form 4)

Officers and directors who bought (6 m)
1
Amount (6 m)
$6.5M
CEO/CFO bought (12 m)
No

10% owners who bought (6 m): 0

Open-market purchases, excluding 10b5-1 plans. Officers and directors only; joint filers of the same purchase count as one. 10% owners with no role are shown separately. 0 = nobody bought; “no data” = we do not have its Form 4 filings.

Each of the company's Form 4 filings, on EDGAR ↗Latest trades, with date and filing →

Above 5% (13D/13G)

Disclosed stakes, with their amendments. A filing is not always a purchase: there are also reductions and changes of filing entity.

This list may be incomplete: we hold 13D and 13G filings made since Dec 23, 2024. A holder above 5% that has not filed anything since then is not shown here.

Above 5% over time (13D/13G)

Each holder with its filings in order. History since December 2024.

Flagged material events (8-K)

  • Aug 17, 2026Routinefiling ↗

    Change in directors or officers (Item 5.02)

  • Jul 1, 2026Routinefiling ↗

    Change in directors or officers (Item 5.02)

  • Jan 7, 2026Routinefiling ↗

    Change in directors or officers (Item 5.02)

  • Jan 2, 2026Routinefiling ↗

    Change in directors or officers (Item 5.02)

Alert items the company itself flagged in its 8-K filings with the SEC, most serious first. It is the form's label, with no interpretation from us: Item 5.02 covers routine appointments as well as a chief executive's departure; open the filing. The quoted headline is the original press release's.

All material events (8-K)

Earnings, agreements, financing, management changes and announcements from the last year, with a filter by type and a link to each filing.

Other Financials stocks in managers' portfolios

Same sector and a similar number of concentrated managers holding them. It is a list to keep exploring, not a recommendation.

All of Financials →

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