AON at a glance
Aon plc (AON, SEC CIK 315293) filed its latest 10-K annual report on February 13, 2026, a 10-Q quarterly report on July 29, 2026, an 8-K current report on September 22, 2026 and Form 4 insider filings as recently as September 3, 2026. SignalX summarizes each filing with AI and tracks the company's insider trades and institutional holders.
- For the fiscal year ended December 31, 2025 (FY2025), Aon plc (AON) reported revenue of $17.2 billion (up 9.4% from FY2024) and net income of $3.7 billion. Diluted EPS was $17.02.
- As of June 30, 2026, 46 institutional investment managers tracked by SignalX reported holding Aon plc (AON) shares worth $28.3 billion in 13F-HR filings.
- The most recent insider open-market purchase reported on Form 4 was by KNIGHT LESTER B on September 2, 2026 of 367 shares at $330.51 per share.
- In the last 90 days, AON insiders reported 6 open-market purchases ($6.5M) and 6 open-market sales ($1.4M) on Form 4, a net purchase of $5.1M.
Source: SEC EDGAR (XBRL financial data, 13F-HR and Form 4 filings).
- Revenue · FY2025
- $17.2B
- +9.4% vs prior year
- Insiders · 90 days
- 6 buys · 6 sells
- Net +$5.1M
- 13F holders
- 46 funds
- $28.3B · −1 vs prior quarter
- Latest 8-K
- Sep 22, 2026
- Item 1.01 · Item 1.02
AI 10-K Annual Report Analysis
Latest 10-K, fiscal year ended Dec 31, 2025
Business Overview
- Core business model: global professional services firm providing risk, retirement, and health solutions through brokerage and consulting
- New emphasis on AI innovation, including generative AI tools with governance to manage operational, legal, and reputational risks
- Strategic shift focusing on proprietary data and analytics tools, notably in insurance/reinsurance placement, to differentiate offerings
- 51.8% of consolidated revenue generated outside U.S., exposing business to currency exchange risks impacting financial results
- Total consolidated debt approx. $15.2 billion as of Dec 31, 2025, heightening financial leverage and impacting operational flexibility
Risk Factors
- Oversight of cybersecurity risks by Audit Committee includes risks from artificial intelligence use and regular CISO reporting
- Exposure to evolving cybersecurity threats despite risk-based safeguards aligned with NIST Cybersecurity Framework
- Third-party risk governance program requires supplier compliance with Aon’s data security mandates and periodic contract reviews
- Reliance on external service providers to assess and assist with security processes introduces potential operational vulnerabilities
- Cybersecurity insurance in place but may not cover all losses from breaches or data privacy events
Management Discussion & Analysis
- Revenue $17.2B, up $1.5B (9%) YoY; Risk Capital $11.3B (+7%), Human Capital $5.9B (+13%)
- Operating margin 25.3% vs 24.4% YoY; Risk Capital margin down 30.4% vs 31.3%; Human Capital margin up 23.9% vs 21.9%
- Best performing segment: Human Capital operating income +23% to $1.4B; Worst performing: Risk Capital margin decline despite +4% income growth to $3.4B
- Operating cash flow $3.5B, up $446M (15%); Free cash flow $3.2B, up $401M (14%); Capex increased $45M; NFP acquisition-related expenses and $1.2B gain on NFP Wealth sale
- Management notes uncertainties from global minimum tax (OECD Pillar Two) and ongoing integration of NFP; 2026 risks include tax regime changes and market conditions
AI summary of the AON 10-K filed . Generated from the filing text; verify against the original.View on SEC EDGARHow to read a 10-K
AI 10-Q Quarterly Report Analysis
Latest 10-Q, quarter ended Jun 30, 2026
Management Discussion & Analysis
- Total debt $15.0B at June 30, down $282M from December 31, 2025
- Commercial paper net issuances $297M vs $114M net repayments YoY
- Operating cash flow expected sufficient for debt service, capital expenditures, and dividends in 2026
- $2.0B available credit across two committed facilities, with no borrowings at June 30
- Contractual client premium guarantees $128M vs $196M at December 31, 2025
Risk Factors
- Risk Factors section not provided in the submitted filing excerpt
- Repurchase authorization increased by $7.5B in June 2026 to $35.0B total
- Share repurchases totaled 1,870,511 shares at average price $320.77
- No unregistered equity sales during second quarter 2026
AI summary of the AON 10-Q filed . Generated from the filing text; verify against the original.View on SEC EDGAR10-K vs 10-Q vs 8-K
AI 8-K Current Report Analysis
The most recent material events, by 8-K item
Item 1.01: Entry into a Material Definitive Agreement
- Prior 2023 Revolving Credit Agreement incorporated by reference into the filing
- Existing revolving credit facility scheduled to mature October 19, 2028
Item 1.02: Termination of a Material Definitive Agreement
- $1 billion revolving credit facility dated September 28, 2021 terminated effective September 18, 2026
- Termination coincided with entry into a replacement Revolving Credit Agreement
Item 8.01: Other Events
- $15.5B senior notes issued across 2029–2056 maturities, primarily financing Aon’s planned USI acquisition
- Net proceeds approximately $13.4008B, alongside expected term-loan proceeds and liquidity
Item 8.01: Other Events
- Merger-related filing provides audited USI 2025 financial statements and unaudited six-month 2026 results for investor diligence
- Exhibit 99.3 presents pro forma Aon financials reflecting the USI Advantage merger and related transactions
Item EX-99.1: Item EX-99.1
- Audited USI 2025 statements add financial visibility on Aon’s acquired business, with Ernst & Young issuing an unqualified opinion
- USI generated $2.972B revenue and $60.820M net income in 2025, supporting the asset’s earnings contribution
AI summaries of AON 8-K current reports filed with the SEC. What 8-K item codes mean
SignalX for AON
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Recent Insider Transactions (Form 4)
Latest reported trades by officers, directors and 10% owners
| Insider | Type | Date | Shares | Price |
|---|---|---|---|---|
| KNIGHT LESTER B | Buy | Sep 2, 2026 | 367 | $330.51 |
| KNIGHT LESTER B | Buy | Sep 2, 2026 | 1,739 | $325.63 |
| KNIGHT LESTER B | Buy | Sep 2, 2026 | 7,212 | $327.52 |
| KNIGHT LESTER B | Buy | Sep 2, 2026 | 1,440 | $329.69 |
| KNIGHT LESTER B | Buy | Sep 2, 2026 | 4,145 | $328.34 |
| KNIGHT LESTER B | Buy | Sep 2, 2026 | 5,097 | $326.53 |
| Zeidel Darren | Sell | Jul 28, 2026 | 725 | $378.00 |
| Zeidel Darren | Sell | Jul 28, 2026 | 700 | $376.00 |
Financial SummaryXBRL
| Metric | FY2023 | FY2024 | FY2025 |
|---|---|---|---|
| Profitability | |||
| Revenue | - | $15.7B | $17.2B |
| Operating Income | - | $3.8B | $4.3B |
| Net Income | $2.6B | $2.7B | $3.7B |
| Op. Margin | - | 24.4% | 25.3% |
| Net Margin | - | 16.9% | 21.5% |
| Balance Sheet | |||
| Total Assets | $34.0B | $49.0B | $50.8B |
| Equity | - | $6.1B | $9.4B |
| ROE | - | 43.4% | 39.5% |
| Per Share | |||
| EPS | $12.51 | $12.49 | $17.02 |
| Cash Flow | |||
| Operating CF | - | $3.0B | $3.5B |
| CapEx | $252.0M | $218.0M | $263.0M |
Source: XBRL data in Aon plc (AON)'s 10-K filings on SEC EDGAR, in USD. Compare across companies →
13F Fund Holdings: Quarterly Trend
Latest: Q2 2026Aggregate AON share value held by 13F filers tracked by SignalX, by quarter.
Quarterly totals table
| Quarter | Funds | Total value |
|---|---|---|
| Q2 2026 | 46 | $28.34B |
| Q1 2026 | 47 | $24.10B |
| Q4 2025 | 46 | $26.68B |
| Q3 2025 | 46 | $28.60B |
| Q2 2025 | 42 | $28.57B |
| Q1 2025 | 41 | $24.78B |
| Q4 2024 | 38 | $15.72B |
| Q3 2024 | 35 | $7.89B |
- JPMorgan Chase & Co+6.53M (+116%)
- Vanguard Portfolio Management LLC+2.64M (+58%)
- T. Rowe Price Group+1.86M (+145%)
- AQR Capital Management+926.0K (+95%)
- Millennium Management+292.2K (+1463%)
- BlackRock−432.1K (-3%)
- Invesco Ltd−417.3K (-28%)
- Ameriprise Financial−387.9K (-36%)
- Morgan Stanley−160.2K (-3%)
- BNY Mellon−129.9K (-4%)
Source: 13F-HR filings on SEC EDGAR (aggregated from 341 fund-quarter rows). Reflects only 13F filers tracked by SignalX, not the full institutional ownership universe. How 13F filings work
AON filing archive
AI analysis pages for each 10-K, 10-Q and 8-K
10-K annual reports
10-Q quarterly reports
Latest 2026 SEC Filings: 10-K, 10-Q, 8-K & Form 4
| Form | Filing date | Period | Analysis | SEC |
|---|---|---|---|---|
| 8-K | Sep 22, 2026 | - | Analysis | - |
| 8-K | Sep 17, 2026 | - | Analysis | - |
| 8-K | Sep 11, 2026 | - | Analysis | - |
| 4 | Sep 3, 2026 | - | - | - |
| 8-K | Aug 31, 2026 | - | Analysis | - |
| 8-K | Aug 17, 2026 | - | Analysis | - |
| 4 | Jul 30, 2026 | - | - | - |
| 8-K | Jul 29, 2026 | - | Analysis | - |
| 10-Q | Jul 29, 2026 | Jun 30, 2026 | Analysis | |
| 4 | Jul 21, 2026 | - | - | - |
| SC 13G | Jul 16, 2026 | - | - | |
| 4 | Jul 9, 2026 | - | - | - |
| 4 | Jul 6, 2026 | - | - | - |
| 8-K | Jul 1, 2026 | - | Analysis | - |
| 4 | Jun 29, 2026 | - | - | - |
| 4 | Jun 29, 2026 | - | - | - |
| 4 | Jun 29, 2026 | - | - | - |
| 4 | Jun 29, 2026 | - | - | - |
| 4 | Jun 29, 2026 | - | - | - |
| 4 | Jun 29, 2026 | - | - | - |
| 4 | Jun 29, 2026 | - | - | - |
| 4 | Jun 29, 2026 | - | - | - |
| 4 | Jun 29, 2026 | - | - | - |
| 4 | Jun 29, 2026 | - | - | - |
| 4 | Jun 29, 2026 | - | - | - |
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AON SEC filings: frequently asked questions
Are AON insiders buying or selling?
In the last 90 days, Aon plc (AON) officers, directors and 10% owners reported 6 open-market purchases worth $6.5 million by 1 insider and 6 open-market sales worth $1.4 million by 1 insider on Form 4, a net purchase of $5.1 million. Many insider sales are pre-planned or for taxes, so purchases usually carry more information.
Which institutions hold AON stock?
As of June 30, 2026, the largest Aon plc (AON) holders among the 13F filers tracked by SignalX were BlackRock ($5.2 billion), Vanguard Capital Management LLC ($4.5 billion), JPMorgan Chase & Co ($4.0 billion), State Street Corp ($3.1 billion), Vanguard Portfolio Management LLC ($2.4 billion). 13F-HR reports are filed up to 45 days after each quarter ends.
What was AON's revenue in fiscal year 2025?
For the fiscal year ended December 31, 2025 (FY2025), Aon plc (AON) reported revenue of $17.2 billion (up 9.4% from FY2024) and net income of $3.7 billion. Diluted EPS was $17.02. The figures come from the XBRL data in the 10-K.
What are the main risks in AON's latest 10-K?
In the 10-K filed February 13, 2026, Aon plc (AON) flagged: Oversight of cybersecurity risks by Audit Committee includes risks from artificial intelligence use and regular CISO reporting. Exposure to evolving cybersecurity threats despite risk-based safeguards aligned with NIST Cybersecurity Framework. (AI summary of the Risk Factors section.)
What did AON report in its latest 8-K?
Aon plc (AON) filed an 8-K on September 22, 2026 reporting Item 1.01 (Entry into a Material Definitive Agreement) and Item 1.02 (Termination of a Material Definitive Agreement). Prior 2023 Revolving Credit Agreement incorporated by reference into the filing.
What are the latest AON SEC filings?
Aon plc (AON) filed its latest 10-K annual report on February 13, 2026, a 10-Q quarterly report on July 29, 2026, an 8-K current report on September 22, 2026 and a Form 4 insider filing on September 3, 2026.
What is AON's SEC CIK number?
Aon plc (AON)'s SEC Central Index Key (CIK) is 315293. EDGAR lists every AON filing under that number.
Ask anything about AON
The research agent reads AON's filings, financials, insider trades and 13F holders, then answers with sources.