Aon plc Class A Ordinary Shares (Ireland) (AON)
AON moved a median of -0.11% 30 minutes after news, and -0.03% by the close. How AON actually reacts to news — the realized, point-in-time move the market made, measured across 607 labeled events over the last three years with zero look-ahead.
AON’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.08% | 39% | 606 |
| 30-min | -0.11% | 41% | 607 |
| 60-min | -0.11% | 45% | 607 |
| to close | -0.03% | 48% | 601 |
| Middle 50% of AON reactions | -0.41% to +0.18% |
|---|---|
| Median reaction (30-min) | -0.11% |
| Measured reactions | 607 |
Half of all Aon plc Class A Ordinary Shares (Ireland) news events land between -0.41% and +0.18% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How AON reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 37 | +0.22% | 68% | +0.97% |
| Analyst downgrades | 21 | +0.14% | 62% | +0.32% |
| Coverage initiations | 22 | +0.48% | 55% | +0.06% |
| Rating reiterations | 134 | +0.03% | 53% | +0.14% |
| Price-target raises | 40 | +0.06% | 58% | +0.20% |
| Price-target cuts | 35 | -0.03% | 46% | +0.20% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The same measurement runs across every name in the dataset. See how AON ranks against every other measured name →
That’s how AON usually reacts — get an email when it moves on news →Email me when AON moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to AON's baseline. Nothing else.
Recent AON events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Aon and the European Bank for Reconstruction and Development expand war risk insurance facility for Ukraine | Press release | PR Newswire | -0.20% | -0.46% | |
| Aon Announces Quarterly Cash Dividend | Press release | PR Newswire | +0.23% | -0.03% | |
| Aon Announces Third-Quarter 2026 Earnings Release and Conference Call Date | Press release | PR Newswire | +0.23% | -0.03% | |
| Canadian defined benefit pension plans show increased funded levels in Q3: Aon | Press release | Canada Newswire | +0.04% | -0.09% | |
| Aon Launches Power Lifecycle Program to Support Conventional Gas Power Projects Powering Digital Infrastructure Growth | Press release | Canada Newswire | -1.21% | -1.95% | |
| Aon Appoints Jane Drummond as Global Chief Commercial Officer | Press release | Canada Newswire | -0.70% | -1.70% | |
| Form 8-K Aon plc For: Sep 18 | SEC filing · Form 8-K | SEC EDGAR | -0.70% | -1.70% | |
| Form CERT Aon plc | SEC filing · Form CERT | SEC EDGAR | -0.01% | +0.47% | |
| Form 8-A12B Aon plc | SEC filing · Form 8-A12B | SEC EDGAR | -0.01% | +0.47% | |
| Form 8-K Aon plc For: Sep 14 | SEC filing · Form 8-K | SEC EDGAR | -0.01% | +0.47% | |
| Form 8-K Aon plc For: Sep 11 | SEC filing · Form 8-K | SEC EDGAR | -0.56% | -2.09% | |
| Aon to Speak at the KBW Insurance Conference | Press release | PR Newswire | -0.06% | -1.08% | |
| Aon to acquire USI to establish the premier U.S. middle-market platform | Press release | Canada Newswire | -0.26% | -5.43% | |
| Form 8-K Aon plc For: Aug 30 | SEC filing · Form 8-K | SEC EDGAR | -0.26% | -5.43% | |
| Q3 2026 Insurance Labor Market Study Results Reflect Slowing Turnover and Modest Growth | Press release | Business Wire | -0.02% | -0.24% | |
| Aon: U.S. Employer Health Care Costs Continue Multi-Year Climb, Projected to Rise 9.5% in 2027 | Press release | PR Newswire | +0.45% | +1.32% | |
| Aon Announces Doug Hammond as Global Executive Chairman of Middle Market and Leadership Appointments for the North America Middle Market Segment | Press release | PR Newswire | +0.23% | +1.22% | |
| Aon Announces CFO Transition | Press release | Canada Newswire | +1.68% | +0.00% | |
| Aon Launches Sidecar X with $200 Million Capacity Secured | Press release | Business Wire | +0.70% | -1.56% | |
| Form 8-K Aon plc For: Aug 17 | SEC filing · Form 8-K | SEC EDGAR | +1.68% | +0.00% | |
| Aon Appoints Darren Van't Hof as Head of Transaction Solutions Tax Credit Financing | Press release | Business Wire | +0.09% | +1.18% | |
| Aon Reports Second-Quarter 2026 Results | Press release | PR Newswire | +1.03% | +2.59% | |
| Form 10-Q Aon plc For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.67% | -0.77% | |
| Form 8-K Aon plc For: Jul 29 | SEC filing · Form 8-K | SEC EDGAR | +1.03% | +2.59% | |
| Q3 2026 Insurance Labor Market Study Results to be Highlighted in Webinar | Press release | Business Wire | +1.03% | +2.59% | |
| Aon expands Data Center Lifecycle Insurance Program to $5 billion with Reliable by Design Approach to Digital Infrastructure | Press release | Canada Newswire | -0.78% | -0.57% | |
| Aon Announces Quarterly Cash Dividend | Press release | PR Newswire | +0.65% | +2.01% | |
| Aon Announces Second-Quarter 2026 Earnings Release and Conference Call Date | Press release | PR Newswire | +0.65% | +2.01% | |
| Pulse Clean Energy Closes Two UK Energy Storage Projects With Support From Ariel Green's Technology Performance Insurance | Press release | PR Newswire | +0.76% | -0.05% | |
| Q3 2026 Insurance Labor Market Study Now Open for Participation | Press release | Business Wire | -0.43% | -0.69% | |
| Canadian defined benefit pension plans show increased funded levels in Q2: Aon | Press release | Canada Newswire | -0.02% | +0.62% | |
| Form S-3ASR Aon plc | SEC filing · Form S-3ASR | SEC EDGAR | -0.96% | +0.06% | |
| Form 8-K Aon plc For: Jun 26 | SEC filing · Form 8-K | SEC EDGAR | -0.12% | +3.19% | |
| Aon Clients Recover More Than $3B in Transaction Liability Insurance Globally as Claims Activity Continues to Evolve | Press release | Business Wire | -0.04% | -0.18% | |
| Aon to Speak at the Morgan Stanley U.S. Financials Conference | Press release | PR Newswire | -0.07% | -0.54% | |
| Aon Announces Regional Leadership Appointments to Advance Aon United Strategy | Press release | Canada Newswire | -1.04% | -1.37% | |
| Aon to modernize how brokers access capital and syndicate risk with new Digital Placement Exchange (Aon DPX) trading platform | Press release | Canada Newswire | +0.67% | +2.85% | |
| Aon Expands Aon Claims Copilot Globally, Strengthening Data and Analytics Capabilities Across Commercial Risk | Press release | PR Newswire | -0.43% | -0.87% | |
| Aon Reports First-Quarter 2026 Results | Press release | PR Newswire | -0.27% | -3.56% | |
| Form 10-Q Aon plc For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.25% | +1.61% | |
| Form 8-K Aon plc For: May 01 | SEC filing · Form 8-K | SEC EDGAR | +0.10% | -2.84% | |
| Form ARS Aon plc For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.10% | +0.81% | |
| Form DEF 14A Aon plc For: Jun 26 | SEC filing · Form DEF | SEC EDGAR | +0.10% | +0.81% | |
| Form DEFA14A Aon plc | SEC filing · Form DEFA14A | SEC EDGAR | +0.10% | +0.81% | |
| Nearly 90 percent of companies believe people will determine AI success, but far fewer are investing in related people strategies, Inaugural Aon Study Finds | Press release | Canada Newswire | -0.10% | -1.29% | |
| Canadian insurance market is competitive but complex, Aon's Spring 2026 Market Update | Press release | Canada Newswire | +0.48% | +1.33% | |
| Aon expands Data Center Lifecycle Insurance Program capacity to $3.5 billion in support of Digital Infrastructure clients | Press release | Canada Newswire | -0.03% | +1.32% | |
| Aon Announces 10% Increase to Quarterly Cash Dividend | Press release | PR Newswire | +0.70% | +3.30% | |
| Aon Announces First-Quarter 2026 Earnings Release and Conference Call Date | Press release | PR Newswire | +0.70% | +3.30% | |
| Canadian defined benefit pension plans' funded positions decreased in Q1, reaching 111.4 percent: Aon | Press release | Canada Newswire | -0.07% | -0.70% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the AON section they belong to.
Where else AON is measured.
AON earnings → · Analyst actions → · SEC filings →
Other Financial Services names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| UBS Group AG Registered Ordinary Shares (UBS) | 612 | +0.02% | 51% |
| Allstate Corporation (The) (ALL) | 607 | +0.02% | 54% |
| Delaware Enhanced Global Dividend Common Shares of Beneficial Interest (DEX) | 607 | 0.00% | 39% |
| Erie Indemnity Company - Class A (ERIE) | 607 | +0.03% | 54% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
All Financial Services names, measured the same way →
Every ticker we measure the same way24
Apple (AAPL)
How AAPL actually reacts to news, measured.
NVIDIA (NVDA)
How NVDA actually reacts to news, measured.
Tesla (TSLA)
How TSLA actually reacts to news, measured.
Microsoft (MSFT)
How MSFT actually reacts to news, measured.
Advanced Micro Devices (AMD)
How AMD actually reacts to news, measured.
Amazon (AMZN)
How AMZN actually reacts to news, measured.
Alphabet (GOOG)
How GOOG actually reacts to news, measured.
Meta Platforms (META)
How META actually reacts to news, measured.
Broadcom (AVGO)
How AVGO actually reacts to news, measured.
JPMorgan Chase (JPM)
How JPM actually reacts to news, measured.
Visa (V)
How V actually reacts to news, measured.
Walmart (WMT)
How WMT actually reacts to news, measured.
Eli Lilly (LLY)
How LLY actually reacts to news, measured.
UnitedHealth Group (UNH)
How UNH actually reacts to news, measured.
Netflix (NFLX)
How NFLX actually reacts to news, measured.
Johnson & Johnson (JNJ)
How JNJ actually reacts to news, measured.
Exxon Mobil (XOM)
How XOM actually reacts to news, measured.
Home Depot (HD)
How HD actually reacts to news, measured.
Costco (COST)
How COST actually reacts to news, measured.
Mastercard (MA)
How MA actually reacts to news, measured.
Oracle (ORCL)
How ORCL actually reacts to news, measured.
Salesforce (CRM)
How CRM actually reacts to news, measured.
Bank of America (BAC)
How BAC actually reacts to news, measured.
Coca-Cola (KO)
How KO actually reacts to news, measured.
Walt Disney (DIS)
How DIS actually reacts to news, measured.
Browse all tickers
Every name we’ve measured, in one place.
How the numbers are made.
How is Aon plc Class A Ordinary Shares (Ireland)'s median reaction calculated?
Every labeled AON news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 607 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 41% of AON's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does AON's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.