Observatory · observe first
Quest Diagnostics
DGX · United States · Health Care Services · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.045%
12M weight contribution
+0.005 pp
3M weight contribution
+0.016 pp
12M price return
+41.6%
Share of matched S&P 500 members
Monthly observations through Jul 2026
Company price index
A separate dimension from market allocation
Historical observations
Most recent 24 observations at or before the selected month
| Month | Market cap | Universe weight | 12M weight change | 12M return | Above 6M weight average |
|---|---|---|---|---|---|
| Jul 2026 | $25.7bn | 0.045% | +0.005 pp | +41.6% | Yes |
| Jun 2026 | $23.5bn | 0.041% | -0.002 pp | +20.1% | Yes |
| May 2026 | $21.6bn | 0.037% | -0.006 pp | +14.5% | Yes |
| Apr 2026 | $21.5bn | 0.029% | -0.019 pp | +10.9% | No |
| Mar 2026 | $21.5bn | 0.031% | -0.013 pp | +18.0% | No |
| Feb 2026 | $23.3bn | 0.032% | -0.011 pp | +24.8% | No |
| Jan 2026 | $20.8bn | 0.040% | -0.001 pp | +16.8% | No |
| Dec 2025 | $19.3bn | 0.038% | -0.000 pp | +17.2% | No |
| Nov 2025 | $21.0bn | 0.041% | +0.001 pp | +18.5% | Yes |
| Oct 2025 | $19.6bn | 0.038% | -0.002 pp | +15.8% | No |
| Sep 2025 | $21.3bn | 0.043% | +0.002 pp | +25.1% | No |
| Aug 2025 | $20.3bn | 0.042% | -0.000 pp | +18.0% | No |
| Jul 2025 | $18.7bn | 0.039% | +0.011 pp | +19.9% | No |
| Jun 2025 | $20.1bn | 0.043% | +0.015 pp | +33.9% | No |
| May 2025 | $19.4bn | 0.044% | +0.014 pp | +24.6% | Yes |
| Apr 2025 | $19.9bn | 0.048% | +0.003 pp | +31.6% | Yes |
| Mar 2025 | $18.8bn | 0.045% | +0.004 pp | +29.8% | Yes |
| Feb 2025 | $19.2bn | 0.043% | +0.003 pp | +41.4% | Yes |
| Jan 2025 | $18.2bn | 0.040% | -0.002 pp | +29.7% | Yes |
| Dec 2024 | $16.8bn | 0.038% | -0.008 pp | +11.8% | No |
| Nov 2024 | $18.2bn | 0.040% | -0.008 pp | +21.1% | Yes |
| Oct 2024 | $17.3bn | 0.041% | -0.009 pp | +21.6% | Yes |
| Sep 2024 | $17.3bn | 0.040% | -0.005 pp | +30.3% | Yes |
| Aug 2024 | $17.5bn | 0.042% | -0.005 pp | +22.0% | Yes |
Its weight is estimated market cap divided by the total estimated market cap of matched S&P 500 members for the month. This is not an official float-adjusted S&P index weight.