Observatory · observe first
Union Pacific Corporation
UNP · United States · Rail Transportation · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.300%
12M weight contribution
+0.029 pp
3M weight contribution
-0.033 pp
12M price return
-2.6%
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 | $132.4bn | 0.300% | +0.029 pp | -2.6% | No |
| Apr 2025 | $128.9bn | 0.309% | -0.110 pp | -7.0% | No |
| Mar 2025 | $142.8bn | 0.339% | -0.077 pp | -1.8% | Yes |
| Feb 2025 | $149.1bn | 0.333% | -0.110 pp | -0.6% | Yes |
| Jan 2025 | $150.2bn | 0.334% | -0.108 pp | +3.8% | No |
| Dec 2024 | $138.3bn | 0.313% | -0.133 pp | -5.1% | No |
| Nov 2024 | $148.3bn | 0.327% | -0.101 pp | +11.0% | Yes |
| Oct 2024 | $140.7bn | 0.331% | -0.100 pp | +14.2% | Yes |
| Sep 2024 | $150.2bn | 0.350% | -0.065 pp | +23.7% | Yes |
| Aug 2024 | $156.0bn | 0.377% | -0.051 pp | +18.7% | Yes |
| Jul 2024 | $150.3bn | 0.269% | -0.039 pp | +8.7% | No |
| Jun 2024 | $138.0bn | 0.259% | -0.030 pp | +13.1% | No |
| May 2024 | $142.0bn | 0.272% | -0.018 pp | +23.7% | No |
| Apr 2024 | $144.7bn | 0.419% | +0.016 pp | +24.0% | No |
| Mar 2024 | $150.0bn | 0.416% | -0.004 pp | +25.1% | No |
| Feb 2024 | $154.7bn | 0.443% | -0.003 pp | +25.3% | Yes |
| Jan 2024 | $148.7bn | 0.442% | +0.013 pp | +22.5% | Yes |
| Dec 2023 | $149.7bn | 0.447% | -0.013 pp | +21.6% | Yes |
| Nov 2023 | $137.3bn | 0.428% | -0.026 pp | +6.3% | Yes |
| Oct 2023 | $126.6bn | 0.430% | +0.000 pp | +8.0% | Yes |
| Sep 2023 | $124.1bn | 0.414% | -0.064 pp | +7.2% | Yes |
| Aug 2023 | $134.4bn | 0.428% | -0.073 pp | +0.8% | Yes |
| Jul 2023 | $141.4bn | 0.308% | -0.180 pp | +4.7% | No |
| Jun 2023 | $124.8bn | 0.289% | -0.232 pp | -1.6% | 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.