Ireland was Icon’s largest region in fiscal 2025, bringing in $3.18B of $8.25B (39%).
| Geography | FY 2011 | FY 2020 | FY 2021 | FY 2023 | FY 2025 |
|---|---|---|---|---|---|
| United States | $3.28B | $2.52B | |||
| Ireland | $2.32B | $3.18B | |||
| Rest Of Europe | $1.57B | $1.59B | |||
| Rest Of World | $884.50M | $951.90M | |||
| Other | — | — | |||
| Total | $8.05B | $8.25B |
Icon brought in $8.25B from its four regions in fiscal 2025, the year ended December 31, 2025. That was up 2.4% from $8.05B in fiscal 2023, the previous year with figures. Ireland was the largest at $3.18B (38.6%), ahead of United States at $2.52B (30.6%) and Rest Of Europe at $1.59B (19.3%). The remaining region, Rest Of World, brought in $951.90M.
Compared with fiscal 2023, the previous year with figures, Ireland grew fastest, up 37.4% to $3.18B, while United States fell the most, down 23.0% to $2.52B. From fiscal 2023 to 2025, combined revenue from these regions grew from $8.05B to $8.25B, a compound annual growth rate of 1.2%. Ireland's share of the total rose from 28.8% to 38.6%.
Other was Icon’s largest revenue line in fiscal 2025, bringing in $2.97B of $8.25B (36%).
| Customer | FY 2020 | FY 2021 | FY 2023 | FY 2024 | FY 2025 |
|---|---|---|---|---|---|
| Other | $2.99B | — | $2.97B | ||
| Clients 11-25 | $1.75B | — | $2.07B | ||
| Clients 2-5 | $1.45B | $1.42B | $1.47B | ||
| Clients 6-10 | $1.17B | — | $1.16B | ||
| Top Client | $704.03M | $641.66M | $576.27M | ||
| Total | $8.05B | $2.06B | $8.25B |
Icon brought in $8.25B from its five revenue lines in fiscal 2025, the year ended December 31, 2025. Icon regrouped these revenue lines after fiscal 2024, so the total does not compare directly with that year's $2.06B. Other was the largest at $2.97B (36.0%), ahead of Clients 11-25 at $2.07B (25.1%) and Clients 2-5 at $1.47B (17.8%). The other two revenue lines brought in $1.74B combined.
Compared with fiscal 2024, Clients 2-5 grew 3.4% to $1.47B, while Top Client fell 10.2% to $576.27M. From fiscal 2023 to 2025, combined revenue from these revenue lines grew from $8.05B to $8.25B, a compound annual growth rate of 1.2%. Other's share of the total fell from 37.1% to 36.0%.
As Reported was Icon’s largest revenue line in fiscal 2023, bringing in $8.12B of $8.14B (100%).
| Revision of Prior Period | FY 2023 |
|---|---|
| As Reported | $8.12B |
| Adjustments | $23.30M |
| Total | $8.14B |
Icon brought in $8.14B from its two revenue lines in fiscal 2023, the year ended December 31, 2023. As Reported was the largest at $8.12B (99.7%), ahead of Adjustments at $23.30M (0.3%).
Icon (ICLR) reports its revenue by geography, by customer and by revision of prior period. In fiscal 2025, Ireland was its largest region, bringing in $3.18B (38.6% of the total), followed by United States at $2.52B (30.6%).
Ireland was Icon's largest region in fiscal 2025, bringing in $3.18B, or 38.6% of the $8.25B total across its four regions.
Other was Icon's largest revenue line in fiscal 2025, bringing in $2.97B, or 36.0% of the $8.25B total across its five revenue lines.
Every figure comes from Icon's annual financial filings, as reported. Each line keeps the name Icon gives it, and years follow its fiscal calendar.
Icon's revenue by geography goes back to fiscal 2011, with figures through fiscal 2025. The latest four fiscal years are free to view, and the full history is available with a Business Quant subscription.