Arthur J. Gallagher & Co. AJG
Revenue Intelligence Report • 66 quarters of SEC filing data • Updated 2026-03-15
Arthur J. Gallagher & Co. has a forecasted full-year revenue of $15B, a +6.4% year-over-year change, based on 66 quarters of SEC filing data. Key revenue drivers include SG&A ($1.40 per $1). The ARDL model achieves strong accuracy at 4.8% MAPE.
Investment Thesis
The econometric model achieves strong accuracy (4.8% MAPE), suggesting Arthur J. Gallagher & Co.'s revenue trajectory is well-characterized by its spending patterns. Each $1 of SG&A spending generates $1.40 in revenue, reflecting strong commercial efficiency.
Next FY Revenue
$14.8B
+6.4% YoY
SG&A Multiplier
$1.40 per $1
Model Accuracy
4.8% MAPE
Holdout validation: The model predicted $3.2B vs the actual $3.6B — an error of 11.0%.
Note:
Arthur J. Gallagher & Co. does not report R&D expenses separately. This analysis uses SG&A spending only.
Revenue Forecast
Quarterly Detail
| Quarter | Model Forecast | Actual | 95% Range | YoY Growth | Status |
|---|---|---|---|---|---|
| Q4 2025 | $3.2B | $3.6B | $3.1B – $3.4B | +18.9% | ✗ Outside range |
| Q2 2026 | $3.6B | $3.4B – $3.8B | -2.8% | ||
| Q3 2026 | $3.6B | $3.4B – $3.9B | +12.4% | ||
| Q4 2026 | $3.8B | $3.5B – $4.1B | +13.2% | ||
| Q1 2027 | $3.8B | $3.5B – $4.1B | +4.3% |
How Spending Drives Revenue
Reading this chart:
Each line shows the cumulative revenue generated per $1 spent over subsequent quarters. The effect builds over 4-5 quarters as investments mature.
Want this analysis for your portfolio?
I build custom revenue intelligence reports for investors and companies using SEC filing data, econometric modeling, and AI-powered insights.
Get in Touch