Close on Sep 18, 2026. Page updated Sep 19, 9:17 pm ET.
Aon closes at $295.64, down 0.1%, with the stock below both its 50-day average of $345.56 and its 200-day average of $335.24. The GekkoIndex reads 71.4, placing the stock in the Buying zone, while the price sits 17.8% below Gekko Fair Value of $359.74. Shares are down 15.2% over one month, 7% over three months, 6.7% over six months, and 17.4% over the past year, trading near the 52-week low of $293.00 and well off the 52-week high of $382.34.
This week's activity centers on Aon Chairman Lester Knight's purchase of 20,000 shares for approximately $6.5 million, and on financing tied to the USI acquisition, with a $13.5 billion bond offering supporting the $17 billion deal drawing about $65 billion in orders. TD Cowen also raised its price target on Aon to $420 from $416 while keeping a Buy rating, an action concerning the company's outlook amid the broader deal financing backdrop.
Aon's next earnings report is due 30 October 2026, 40 days out and outside a typical 20-trading-day window, following a 29 July report where EPS of $3.81 beat the $3.77 estimate but the stock reacted -3.9%; it has beaten estimates in 7 of the last 8 quarters, with an average absolute reaction of 3.1%. Over the last 90 days, insiders made 6 open-market purchases totaling $6,549,688, and two billionaire holders are noted. Seasonally, the next 20 trading days have averaged a 0.6% gain over 5 years, positive in 2 of those years.
Written by AI and checked automatically against the figures on this page. Generated Sep 20, 2026 from the data above.
Aon scores 4 supportive, 2 mixed and 0 headwinds across the 6 checklist items with data.
Six things swing traders check before a 20-day hold, read from the latest data.
4 supportive2 mixed0 headwinds
Averages disagree
Close $295.64 sits between the 50-day ($345.56) and 200-day ($335.24) averages, or the averages disagree.
See the chart71.4, Buying
Reading 71.4 is in the Buying zone.
See the GekkoIndex17.8% below
Price is 17.8% below Gekko Fair Value (more than 5% below).
See fair valueLeans bullish
Last 90 days: 6 open-market insider purchases.
See smart moneyReports in 40 days
Next report Oct 30, 2026, 40 days away — outside a typical 20-trading-day hold.
See earnings+0.6% on average
From this point in the calendar, the next 20 trading days averaged +0.6% over 5 years, rising in 2 of them.
See seasonalityA description of current data, not a recommendation. How this page works
Aon closed at $295.64 on Sep 18, 2026, −17.4% over the past year, inside a 52-week range of $293.00 to $382.34.
Use the left and right arrow keys to read daily values.
Put AON on a Gekko watchlist and see its GekkoIndex, Gekko Fair Value and smart money signals update on the chart as they change.
Aon works as a professional services provider, helping organizations manage risk and take care of workforce needs across a wide geographic footprint that includes North and South America, Britain and Ireland, other European markets, the Middle East, Africa, and Asian and Pacific markets. Its offerings cover insurance placement and brokerage, specialty risk guidance, and consulting on employee health and benefits, along with retirement and investment planning, giving it a reputation built around blending risk advice with human resources support.
Business activity is grouped into two broad areas, one tied to risk and capital matters and the other to human capital concerns. Through these, Aon arranges reinsurance coverage, assists with fundraising and merger transactions, supports pension plan administration, and offers advice on investment strategy for retirement programs. Clients drawing on these services include large businesses, government pension systems, university endowments, and charitable foundations.
The company dates its incorporation to 1979 and runs its headquarters from Dublin, Ireland. Its stock trades on the NYSE under the symbol AON.
Aon’s GekkoIndex — Gekko’s 0 to 100 smart money score — reads 71.4, in the Buying zone, down 3.1 points over five sessions.
Down 3.1 points over five sessions.
Reading for Sep 18, 2026
| Zone | Readings | 5 days | 20 days | ||
|---|---|---|---|---|---|
| Buying (current zone) | 19 | +3.0% | +1.7% | ||
| Accumulation | 213 | +0.2% | +0.8% | ||
| Neutral | 402 | −0.1% | +0.4% | ||
| Distribution | 24 | −0.9% | −1.5% | ||
| Selling | 4 | Too few readings yet | |||
Average AON share-price change over the trading days after each daily reading in its GekkoIndex history. Across every stock Gekko tracks, Buying readings averaged +3.2% over 20 days. Past behaviour doesn’t guarantee future results.
Buying zone: Smart money likely accumulating heavily. About the five zones →
Aon trades 17.8% below Gekko Fair Value of $359.74, so the shares are undervalued on Gekko’s estimate.
Gekko’s own estimate of what Aon shares are worth, recalculated every trading day.
$359.74
Gekko Fair Value, Sep 19, 2026
17.8% Undervalued
Insiders filed 6 open-market purchases in Aon worth $6.55M, and no Congress trades were disclosed, in the last 90 days.
Plus buybacks, unusual options and fund positions, each dated to when it became public.
$6.55Min 6 open-market purchases
| Filed | Insider | Type | Value |
|---|---|---|---|
| Sep 3 | KNIGHT LESTER B director | Purchase | $2.36M |
| Sep 3 | KNIGHT LESTER B director | Purchase | $1.66M |
| Sep 3 | KNIGHT LESTER B director | Purchase | $1.36M |
| Sep 3 | KNIGHT LESTER B director | Purchase | $566K |
| Sep 3 | KNIGHT LESTER B director | Purchase | $475K |
From Form 4 filings, dated to when each was filed.
No trades in AON were disclosed by members of Congress in the last 90 days.
From congressional disclosures, which report amounts as ranges.
Aon has been buying back its own shares.
From company filings.
2of the funds Gekko tracks hold AON.
Aon reports on Oct 30, 2026, before the open (40 days away), and beat the EPS estimate in 7 of its last 8 reports.
Oct 30, 2026
Expected before the open, 40 days away
| Reported | EPS | Revenue | Move |
|---|---|---|---|
| Jul 29, 2026 | $3.81 est $3.77 | $4.25B est $4.28B | −3.9% |
| May 1, 2026 | $6.48 est $6.35 | $5.03B est $4.97B | +1.0% |
| Jan 30, 2026 | $4.85 est $4.75 | $4.30B est $4.38B | +1.9% |
| Oct 31, 2025 | $3.05 est $2.91 | $4.00B est $3.96B | +3.5% |
| Jul 25, 2025 | $3.49 est $3.40 | $4.16B est $4.17B | +3.5% |
| Apr 25, 2025 | $5.67 est $6.01 | $4.73B est $4.87B | −5.9% |
| Jan 31, 2025 | $4.42 est $4.25 | $4.15B est $4.20B | +0.7% |
| Oct 25, 2024 | $1.57 est $1.42 | $3.72B est $3.69B | +4.2% |
“Move” is the close of the first session after the report compared with the close of the last session before it, so it reads the same whether the company reported before the open or after the close.
Analysts’ average 12-month price target for Aon is $381.00, +28.9% from the last close, from 17 firms rating the stock in the last 90 days.
Each firm’s latest rating in the last 90 days: 17 firms.
| Date | Firm | Target | vs price |
|---|---|---|---|
| Sep 15 | William Blair | — | — |
| Sep 15 | Mizuho Securities | $366 | +23.8% |
| Sep 14 | TD Cowen | $420 | +42.1% |
| Sep 3 | Bank of America Securities | $339 | +14.7% |
| Sep 3 | Morgan Stanley | $410 | +38.7% |
Gekko doesn’t publish price predictions. These are analyst targets and historical base rates, which don’t guarantee future results.
Over the next 20 trading days from Sep 19, Aon averaged +0.6% across the last 5 years, rising in 2 of them.
| Window | Average | Years higher |
|---|---|---|
| Next 5 trading days | −0.7% | 2 of 5 |
| Next 10 trading days | −1.0% | 1 of 5 |
| Next 15 trading days | +0.7% | 4 of 5 |
| Next 20 trading days | +0.6% | 2 of 5 |
| Next 30 trading days | +0.2% | 3 of 5 |
For scale, AON’s typical 20-trading-day move in either direction is about 4.1%.
Aon’s market cap is $62.71B, with a P/E ratio of 16.6 and revenue of $17.58B over the last twelve months.
3 headlines about Aon from the past week, newest first, each linking to the publisher.
Aon’s 6 largest industry peers by market value, with today’s move, GekkoIndex zone and gap to Gekko Fair Value.
| Stock | GekkoIndex zone | vs Fair Value |
|---|---|---|
| MRSHMarsh | Accumulation | 9.9% below |
| AJGArthur J. Gallagher | Accumulation | 10.9% below |
| WTWWillis Towers Watson | Accumulation | 10.2% below |
| BROBrown & Brown | Accumulation | 10.4% below |
| RYANRyan Specialty | Accumulation | 11.5% below |
| CRVLCorVel | Neutral | 8.1% above |
A peer links to its own page where one exists.
Aon’s market cap is $62.71B at the Sep 18, 2026 close of $295.64, with 212.1M shares outstanding. The shares trade on a P/E ratio of 16.6.
The consensus analyst 12-month price target for Aon is $381.00, +28.9% from the last close. Of the 17 firms that rated the stock in the last 90 days, 12 rate it a buy, 4 a hold and 1 a sell. Gekko doesn’t publish price predictions of its own.
On Gekko’s estimate Aon is undervalued: the Sep 18, 2026 close of $295.64 is 17.8% below Gekko Fair Value of $359.74. Gekko Fair Value is recalculated every trading day, and a gap inside 5% either way counts as about fair value.
Aon is expected to report on Oct 30, 2026, before the market opens (40 days away). Analysts expect earnings of $3.39 per share on revenue of $4.09B. Aon beat the earnings estimate in 7 of its last 8 reports, moving 3.1% on average across the report.
Aon’s 52-week high is $382.34 and its 52-week low is $293.00; it closed at $295.64 on Sep 18, 2026, −17.4% over the past year.
Gekko describes the data; it does not make buy or sell recommendations. On the swing-trade checklist, 4 of the 6 items with data read as supportive (gekkoindex, fair value, smart money and earnings risk), 2 as mixed (trend and seasonality). The checklist is a description of current data, not a recommendation.
Prices and signals update after every US market close; the GekkoIndex, Gekko Fair Value and the checklist are Gekko’s own, and the Gekko Brief is written by AI from this page’s data and checked against it before it is published. How Gekko’s data works →
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