Observatory · observe first
Amgen
AMGN · United States · Biotechnology · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.351%
12M weight contribution
+0.037 pp
3M weight contribution
-0.019 pp
12M price return
-2.7%
Share of matched S&P 500 members
Monthly observations through May 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 |
|---|---|---|---|---|---|
| May 2025 | $155.0bn | 0.351% | +0.037 pp | -2.7% | No |
| Apr 2025 | $156.3bn | 0.375% | -0.050 pp | +9.4% | Yes |
| Mar 2025 | $167.4bn | 0.397% | -0.025 pp | +12.9% | Yes |
| Feb 2025 | $165.5bn | 0.370% | -0.050 pp | +15.9% | Yes |
| Jan 2025 | $153.4bn | 0.341% | -0.159 pp | -6.4% | No |
| Dec 2024 | $140.1bn | 0.318% | -0.142 pp | -6.8% | No |
| Nov 2024 | $152.1bn | 0.336% | -0.114 pp | +8.1% | No |
| Oct 2024 | $172.1bn | 0.404% | -0.061 pp | +29.0% | Yes |
| Sep 2024 | $173.1bn | 0.403% | -0.077 pp | +23.5% | Yes |
| Aug 2024 | $179.4bn | 0.433% | -0.004 pp | +34.1% | Yes |
| Jul 2024 | $178.3bn | 0.320% | +0.047 pp | +46.4% | No |
| Jun 2024 | $167.6bn | 0.314% | +0.040 pp | +45.1% | No |
| May 2024 | $164.1bn | 0.314% | +0.022 pp | +42.9% | No |
| Apr 2024 | $146.8bn | 0.425% | -0.007 pp | +18.1% | No |
| Mar 2024 | $152.4bn | 0.423% | -0.018 pp | +21.6% | No |
| Feb 2024 | $146.8bn | 0.420% | -0.014 pp | +22.2% | No |
| Jan 2024 | $168.2bn | 0.500% | +0.039 pp | +28.8% | Yes |
| Dec 2023 | $154.1bn | 0.460% | -0.046 pp | +13.5% | Yes |
| Nov 2023 | $144.3bn | 0.450% | -0.069 pp | -2.6% | Yes |
| Oct 2023 | $136.8bn | 0.465% | -0.048 pp | -2.2% | Yes |
| Sep 2023 | $143.8bn | 0.480% | +0.006 pp | +23.3% | Yes |
| Aug 2023 | $137.1bn | 0.437% | -0.023 pp | +10.3% | Yes |
| Jul 2023 | $125.1bn | 0.273% | -0.182 pp | -2.2% | No |
| Jun 2023 | $118.6bn | 0.274% | -0.231 pp | -5.7% | 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.