CRL vs ICLR: Correlation
Measured on weekly returns over the past three years, Charles River Laboratories (CRL) and ICON plc (ICLR) carry a correlation of 0.60, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CRL and ICLR?
Across a 3-year window, the weekly returns of CRL and ICLR correlate at 0.60, strong. Little has changed lately, as the 1-year reading of 0.70 lands near the 3-year figure. Stretching to 5 years gives 0.64, with an annualized covariance of 1473.2 %².
In CRL's tracked universe of 33 assets, ICLR sits right near the top at #3. Their recent paths diverged sharply: over the last 12 months CRL outperformed by 84.6 percentage points (+82.1% for CRL against -2.5% for ICLR).
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
CRL vs ICLR: side by side
| CRL (Charles River Laboratories) | ICLR (ICON plc) | |
|---|---|---|
| 1-year return | +82.1% | -2.5% |
| 5-year return | -33.3% | -33.7% |
| Volatility (ann.) | 47.9% | 51.4% |
| Beta vs S&P 500 | 0.92 | 1.03 |
| Max drawdown (3Y) | -63.5% | -76.9% |
| Market cap | $14.3B | $13.1B |
| P/E (trailing) | – | 265.2 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | Health Care | US Listed |
Year-by-year returns
| Year | CRL | ICLR |
|---|---|---|
| 2022 | -42.2% | -37.3% |
| 2023 | +8.5% | +45.7% |
| 2024 | -21.9% | -25.9% |
| 2025 | +8.1% | -13.1% |
| 2026 | +48.6% | -6.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CRL and ICLR good diversifiers for each other?
Somewhat, no more. With 0.60 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between CRL and ICLR?
The CRL/ICLR correlation stands at 0.60 on a 3-year window (1 year: 0.70, 5 years: 0.64), computed from weekly returns as of 2026-08-27.
Is ICLR a good diversifier for CRL?
Somewhat, no more. With 0.60 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.60 mean?
A reading of 0.60 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/crl-vs-iclr.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/crl-vs-iclr/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CRL correlations · ICLR correlations
