Aon plc SEC filings AON
Aon plc has 1,000 filings in SEC EDGAR's recent list, going back to Oct 3, 2014. Its latest annual report, Form ARS, was filed on Apr 28, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 28, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 28, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 424B5 | Prospectus supplement | Sep 15, 2026 | — |
| FWP | Free writing prospectus | Sep 14, 2026 | — |
| 424B5 | Prospectus supplement | Sep 11, 2026 | — |
| S-3ASR | Automatic shelf registration | Jul 2, 2026 | — |
| S-8 | Employee stock plan registration | Jul 25, 2025 | — |
| 424B3 | Prospectus | Apr 23, 2024 | — |
| S-4/A | Filing | Apr 19, 2024 | — |
| S-4/A | Filing | Mar 29, 2024 | — |
| 424B5 | Prospectus supplement | Feb 29, 2024 | — |
| FWP | Free writing prospectus | Feb 29, 2024 | — |
| 424B5 | Prospectus supplement | Feb 27, 2024 | — |
| S-4 | Registration for a merger or exchange | Feb 26, 2024 | — |
| S-8 | Employee stock plan registration | Nov 20, 2023 | — |
| S-3ASR | Automatic shelf registration | Jun 22, 2023 | — |
| 424B5 | Prospectus supplement | Feb 24, 2023 | — |
| FWP | Free writing prospectus | Feb 23, 2023 | — |
| 424B5 | Prospectus supplement | Feb 23, 2023 | — |
| 424B5 | Prospectus supplement | Sep 8, 2022 | — |
| FWP | Free writing prospectus | Sep 7, 2022 | — |
| 424B5 | Prospectus supplement | Sep 7, 2022 | — |
| 424B5 | Prospectus supplement | Feb 25, 2022 | — |
| FWP | Free writing prospectus | Feb 23, 2022 | — |
| 424B5 | Prospectus supplement | Feb 23, 2022 | — |
| 424B5 | Prospectus supplement | Dec 1, 2021 | — |
| FWP | Free writing prospectus | Nov 29, 2021 | — |
| 424B5 | Prospectus supplement | Nov 29, 2021 | — |
| 424B5 | Prospectus supplement | Aug 20, 2021 | — |
| FWP | Free writing prospectus | Aug 18, 2021 | — |
| 424B5 | Prospectus supplement | Aug 18, 2021 | — |
| 424B5 | Prospectus supplement | May 13, 2020 | — |
| FWP | Free writing prospectus | May 12, 2020 | — |
| 424B5 | Prospectus supplement | May 12, 2020 | — |
| S-3ASR | Automatic shelf registration | May 12, 2020 | — |
| S-8 POS | Filing | Apr 2, 2020 | — |
| S-8 POS | Filing | Apr 2, 2020 | — |
| S-8 POS | Filing | Apr 2, 2020 | — |
| S-8 POS | Filing | Apr 2, 2020 | — |
| S-8 POS | Filing | Apr 2, 2020 | — |
| S-8 POS | Filing | Apr 2, 2020 | — |
| S-8 POS | Filing | Apr 2, 2020 | — |
| S-8 | Employee stock plan registration | Nov 27, 2019 | — |
| 424B5 | Prospectus supplement | Nov 14, 2019 | — |
| FWP | Free writing prospectus | Nov 13, 2019 | — |
| 424B5 | Prospectus supplement | Nov 13, 2019 | — |
| 424B5 | Prospectus supplement | May 2, 2019 | — |
| FWP | Free writing prospectus | Apr 30, 2019 | — |
| 424B5 | Prospectus supplement | Apr 30, 2019 | — |
| 424B5 | Prospectus supplement | Nov 30, 2018 | — |
| FWP | Free writing prospectus | Nov 29, 2018 | — |
| 424B5 | Prospectus supplement | Nov 29, 2018 | — |
| S-3ASR | Automatic shelf registration | Sep 25, 2018 | — |
| S-8 POS | Form s-8 pos | Jun 29, 2018 | — |
| 424B5 | Prospectus supplement | Feb 25, 2016 | — |
| FWP | Free writing prospectus | Feb 23, 2016 | — |
| 424B5 | Prospectus supplement | Feb 23, 2016 | — |
| 424B5 | Prospectus supplement | Nov 10, 2015 | — |
| FWP | Free writing prospectus | Nov 9, 2015 | — |
| 424B5 | Prospectus supplement | Nov 9, 2015 | — |
| S-3ASR | Automatic shelf registration | Sep 3, 2015 | — |
| 424B5 | Prospectus supplement | May 14, 2015 | — |
| FWP | Free writing prospectus | May 13, 2015 | — |
| 424B5 | Prospectus supplement | May 13, 2015 | — |
| S-8 | Employee stock plan registration | Oct 31, 2014 | — |
Showing 63 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
Company profile
- Industry
- Insurance Agents, Brokers & Service (SIC 6411)
- Listed as
- AON (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- Ireland
- Headquarters
- Dublin 2, Ireland
- SEC filer status
- Large accelerated filer
- SEC CIK
- 315293
- Former names
- AON CORP (until Apr 2, 2012)
Other Insurance Agents, Brokers & Service companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.