Arthur J. Gallagher & Co. (AJG)
AJG moved a median of +0.07% 30 minutes after news, and +0.23% by the close. How AJG actually reacts to news — the realized, point-in-time move the market made, measured across 683 labeled events over the last three years with zero look-ahead.
AJG’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | +0.02% | 52% | 682 |
| 30-min | +0.07% | 55% | 683 |
| 60-min | +0.05% | 55% | 683 |
| to close | +0.23% | 59% | 682 |
| Middle 50% of AJG reactions | -0.28% to +0.45% |
|---|---|
| Median reaction (30-min) | +0.07% |
| Measured reactions | 683 |
Half of all Arthur J. Gallagher & Co. news events land between -0.28% and +0.45% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How AJG reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 35 | -0.48% | 31% | -0.42% |
| Analyst downgrades | 34 | +0.20% | 53% | +0.17% |
| Coverage initiations | 24 | +0.28% | 58% | +0.11% |
| Rating reiterations | 135 | -0.03% | 47% | -0.09% |
| Price-target raises | 58 | -0.02% | 48% | +0.21% |
| Price-target cuts | 20 | +0.04% | 55% | -0.13% |
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 AJG ranks against every other measured name →
That’s how AJG usually reacts — get an email when it moves on news →Email me when AJG moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to AJG's baseline. Nothing else.
Recent AJG events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Employers Shift Focus from Retirement Access to Financial Outcomes | Press release | PR Newswire | -0.26% | +1.30% | |
| Arthur J. Gallagher & Co. Announces Third Quarter 2026 Earnings Release And Conference Call Date | Press release | PR Newswire | -0.25% | -0.45% | |
| Arthur J. Gallagher & Co. Acquires Ornella Underwriting Limited | Press release | PR Newswire | +0.20% | -0.41% | |
| Arthur J. Gallagher & Co. Acquires Winter & Co Solicitors LLP | Press release | PR Newswire | -0.32% | +1.79% | |
| As Employers Plan for Growth, Workforce Pressures Continue to Mount | Press release | PR Newswire | -0.77% | -2.37% | |
| Arthur J. Gallagher & Co. to Host Regularly Scheduled Quarterly Investor Meeting with Management | Press release | PR Newswire | +0.25% | -0.24% | |
| Form 8-K Arthur J. Gallagher & For: Aug 24 | SEC filing · Form 8-K | SEC EDGAR | -0.10% | -0.17% | |
| Form 13F-NT Arthur J. Gallagher & For: Jun 30 | SEC filing · Form 13F-NT | SEC EDGAR | +0.79% | -0.41% | |
| Form N-PX Arthur J. Gallagher & For: Jun 30 | SEC filing · Form N-PX | SEC EDGAR | +0.63% | +2.18% | |
| Rising Healthcare Costs Push Employers Toward Greater Benefits Oversight | Press release | PR Newswire | +0.63% | +2.18% | |
| Arthur J. Gallagher & Co. Acquires Apollo Insurance Solutions Ltd. | Press release | Canada Newswire | -0.71% | +0.48% | |
| Form 10-Q Arthur J. Gallagher & For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.21% | -0.41% | |
| Arthur J. Gallagher & Co. Announces Second Quarter 2026 Financial Results | Press release | PR Newswire | +0.87% | +0.39% | |
| Form 8-K Arthur J. Gallagher & For: Jul 30 | SEC filing · Form 8-K | SEC EDGAR | +0.87% | +0.39% | |
| Arthur J. Gallagher & Co. Announces Passing of Director David Johnson | Press release | PR Newswire | -0.32% | +2.80% | |
| Arthur J. Gallagher & Co. Announces Regular Third Quarter Dividend | Press release | PR Newswire | -0.46% | -3.40% | |
| Form 8-K Arthur J. Gallagher & For: Jul 22 | SEC filing · Form 8-K | SEC EDGAR | -0.32% | +2.80% | |
| Arthur J. Gallagher & Co. Acquires W.N. Tuscano Agency, Inc. | Press release | PR Newswire | +1.20% | -1.49% | |
| Arthur J. Gallagher & Co. Acquires Med James, Inc. | Press release | PR Newswire | -0.36% | -0.71% | |
| Arthur J. Gallagher & Co. Announces Second Quarter 2026 Earnings Release And Conference Call Date | Press release | PR Newswire | -0.36% | -0.71% | |
| Arthur J. Gallagher & Co. Acquires Wilson M. Beck Insurance Services Inc. | Press release | Canada Newswire | +0.57% | +0.26% | |
| Arthur J. Gallagher & Co. Acquires Cincinnati Benefit Solutions, LLC | Press release | PR Newswire | -0.44% | +0.98% | |
| Form 8-K Arthur J. Gallagher & For: Jun 17 | SEC filing · Form 8-K | SEC EDGAR | +2.76% | +0.09% | |
| Gallagher Survey Finds Business Owners Are Taking More Integrated Approaches to Risk as Pressures Mount | Press release | PR Newswire | -0.19% | +0.43% | |
| ARTHUR J. GALLAGHER & CO. TO HOST REGULARLY SCHEDULED QUARTERLY INVESTOR MEETING WITH MANAGEMENT | Press release | PR Newswire | -0.40% | +1.16% | |
| Arthur J. Gallagher & Co. Acquires Twin Elms, LLC | Press release | PR Newswire | +0.36% | +0.49% | |
| Arthur J. Gallagher & Co. Acquires McKee Risk Management, Inc. | Press release | PR Newswire | -1.64% | +0.13% | |
| Form 13F-NT Arthur J. Gallagher & For: Mar 31 | SEC filing · Form 13F-NT | SEC EDGAR | +0.44% | +3.64% | |
| Gallagher Introduces New AI Tool to Advance the Future of Employer Benefits Decision-Making | Press release | PR Newswire | +1.00% | +1.28% | |
| Form 8-K Arthur J. Gallagher & For: May 12 | SEC filing · Form 8-K | SEC EDGAR | -0.07% | -1.52% | |
| Arthur J. Gallagher & Co. Acquires Mays Brown Solicitors | Press release | PR Newswire | -0.53% | +0.31% | |
| Form 10-Q Arthur J. Gallagher & For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +1.89% | +4.01% | |
| Gallagher Launches Gallagher Blueprint, Pairing AI and Expert Insight to Produce Risk Profile Scores and Market-Ready Action Plans | Press release | PR Newswire | +0.02% | -0.41% | |
| Arthur J. Gallagher & Co. Announces First Quarter 2026 Financial Results | Press release | PR Newswire | -3.09% | -4.75% | |
| Form 8-K Arthur J. Gallagher & For: Apr 30 | SEC filing · Form 8-K | SEC EDGAR | -3.09% | -4.75% | |
| Arthur J. Gallagher & Co. Announces Regular Second Quarter Dividend | Press release | PR Newswire | — | +0.11% | |
| Arthur J. Gallagher & Co. Acquires Bridge Insurance Brokers Limited | Press release | PR Newswire | -0.09% | -0.03% | |
| Arthur J. Gallagher & Co. Announces First Quarter 2026 Earnings Release And Conference Call Date | Press release | PR Newswire | -0.82% | -1.59% | |
| Gallagher Issues Statement on AssuredPartners of South Florida Settlement | Press release | PR Newswire | +0.83% | +1.12% | |
| UK employee demand for income protection triples between age 20 and 59 - but only 24% of employers offer it, finds Gallagher | Press release | PR Newswire | +0.22% | -0.65% | |
| Form DEFA14A Arthur J. Gallagher & | SEC filing · Form DEFA14A | SEC EDGAR | +1.05% | +0.97% | |
| Arthur J. Gallagher & Co. Acquires International Insurance Brokers Pty Ltd | Press release | PR Newswire | +0.32% | +3.77% | |
| Two-thirds of organizations invest in AI training as adoption accelerates - but governance gaps remain | Press release | PR Newswire | -0.55% | -0.76% | |
| Form ARS Arthur J. Gallagher & For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -0.55% | -0.76% | |
| Form DEF 14A Arthur J. Gallagher & For: May 12 | SEC filing · Form DEF | SEC EDGAR | -0.55% | -0.76% | |
| Form DEFA14A Arthur J. Gallagher & | SEC filing · Form DEFA14A | SEC EDGAR | -0.55% | -0.76% | |
| Arthur J. Gallagher & Co. Acquires Asset Partners Private Wealth Pty Ltd | Press release | PR Newswire | +0.88% | -2.25% | |
| Form 8-K Arthur J. Gallagher & For: Mar 17 | SEC filing · Form 8-K | SEC EDGAR | +0.11% | +0.59% | |
| JAGGAER Honored as a U.S. Best-in-Class Employer by Gallagher | Press release | Business Wire | -0.75% | +0.90% | |
| Form 8-K Arthur J. Gallagher & For: Mar 06 | SEC filing · Form 8-K | SEC EDGAR | -0.48% | +0.32% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the AJG section they belong to.
Where else AJG is measured.
AJG earnings → · Analyst actions → · SEC filings →
Other Financial Services names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Cohen & Steers Inc (CNS) | 686 | -0.04% | 47% |
| FCB FINANCIAL HOLDINGS INC (FCB) | 684 | 0.00% | 45% |
| Markel Group Inc. (MKL) | 682 | +0.08% | 55% |
| Salisbury Bancorp, Inc. (SAL) | 679 | 0.00% | 35% |
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 →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Arthur J. Gallagher & Co.'s median reaction calculated?
Every labeled AJG 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 683 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. 55% of AJG'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 AJG'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.