Observatory · observe first
Merck & Co.
MRK · United States · Pharmaceuticals · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.517%
12M weight contribution
-0.431 pp
3M weight contribution
-0.039 pp
12M price return
-32.1%
Share of matched S&P 500 members
Monthly observations through Apr 2025
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 |
|---|---|---|---|---|---|
| Apr 2025 | $215.2bn | 0.517% | -0.431 pp | -32.1% | No |
| Mar 2025 | $226.7bn | 0.538% | -0.388 pp | -30.0% | No |
| Feb 2025 | $233.0bn | 0.521% | -0.402 pp | -25.5% | No |
| Jan 2025 | $250.0bn | 0.556% | -0.354 pp | -15.9% | No |
| Dec 2024 | $251.6bn | 0.571% | -0.253 pp | -6.3% | No |
| Nov 2024 | $257.1bn | 0.567% | -0.242 pp | +1.8% | No |
| Oct 2024 | $259.4bn | 0.610% | -0.276 pp | +2.3% | No |
| Sep 2024 | $287.9bn | 0.670% | -0.202 pp | +13.2% | No |
| Aug 2024 | $300.2bn | 0.725% | -0.156 pp | +11.6% | Yes |
| Jul 2024 | $286.5bn | 0.514% | -0.076 pp | +8.9% | No |
| Jun 2024 | $313.6bn | 0.588% | -0.089 pp | +10.1% | No |
| May 2024 | $318.0bn | 0.608% | -0.084 pp | +16.8% | No |
| Apr 2024 | $327.3bn | 0.948% | -0.042 pp | +15.0% | Yes |
| Mar 2024 | $334.2bn | 0.927% | +0.005 pp | +27.4% | Yes |
| Feb 2024 | $322.0bn | 0.923% | -0.025 pp | +23.0% | Yes |
| Jan 2024 | $306.1bn | 0.910% | -0.022 pp | +15.6% | Yes |
| Dec 2023 | $276.3bn | 0.824% | -0.191 pp | +1.0% | Yes |
| Nov 2023 | $259.7bn | 0.810% | -0.138 pp | -4.4% | Yes |
| Oct 2023 | $260.6bn | 0.886% | -0.024 pp | +4.3% | Yes |
| Sep 2023 | $261.2bn | 0.872% | +0.015 pp | +22.8% | Yes |
| Aug 2023 | $276.5bn | 0.881% | +0.107 pp | +31.3% | Yes |
| Jul 2023 | $270.6bn | 0.590% | -0.187 pp | +22.8% | No |
| Jun 2023 | $292.8bn | 0.677% | -0.219 pp | +30.2% | No |
| May 2023 | $280.2bn | 0.692% | -0.146 pp | +23.6% | No |
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.