Observatory · observe first
Marathon Petroleum
MPC · United States · Oil & Gas Refining & Marketing · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Latest available · not live
20182026
Universe weight
0.187%
12M weight contribution
+0.069 pp
3M weight contribution
+0.057 pp
12M price return
+108.6%
Share of matched S&P 500 members
Monthly observations through Sep 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 |
|---|---|---|---|---|---|
| Sep 2026 | $111.0bn | 0.187% | +0.069 pp | +108.6% | Yes |
| Aug 2026 | $104.8bn | 0.175% | +0.061 pp | +111.2% | Yes |
| Jul 2026 | $92.4bn | 0.161% | +0.051 pp | +89.6% | Yes |
| Jun 2026 | $74.6bn | 0.130% | +0.020 pp | +56.9% | Yes |
| May 2026 | $72.6bn | 0.126% | +0.014 pp | +57.8% | Yes |
| Apr 2026 | $73.2bn | 0.099% | -0.004 pp | +84.6% | No |
| Mar 2026 | $72.0bn | 0.105% | -0.003 pp | +71.2% | Yes |
| Feb 2026 | $58.4bn | 0.080% | -0.025 pp | +34.8% | No |
| Jan 2026 | $53.0bn | 0.101% | -0.003 pp | +23.6% | No |
| Dec 2025 | $48.9bn | 0.096% | -0.006 pp | +19.2% | No |
| Nov 2025 | $58.2bn | 0.114% | +0.004 pp | +26.8% | Yes |
| Oct 2025 | $59.3bn | 0.116% | +0.002 pp | +37.1% | Yes |
| Sep 2025 | $58.6bn | 0.117% | -0.010 pp | +21.0% | Yes |
| Aug 2025 | $54.6bn | 0.113% | -0.030 pp | +3.8% | Yes |
| Jul 2025 | $52.3bn | 0.110% | -0.002 pp | -1.7% | Yes |
| Jun 2025 | $51.0bn | 0.110% | -0.005 pp | -2.1% | Yes |
| May 2025 | $49.4bn | 0.112% | -0.007 pp | -7.0% | Yes |
| Apr 2025 | $43.0bn | 0.103% | -0.082 pp | -22.8% | No |
| Mar 2025 | $45.5bn | 0.108% | -0.094 pp | -26.2% | Yes |
| Feb 2025 | $46.9bn | 0.105% | -0.070 pp | -9.4% | No |
| Jan 2025 | $46.8bn | 0.104% | -0.083 pp | -10.2% | No |
| Dec 2024 | $44.8bn | 0.102% | -0.066 pp | -4.1% | No |
| Nov 2024 | $50.2bn | 0.111% | -0.066 pp | +6.8% | No |
| Oct 2024 | $48.7bn | 0.114% | -0.081 pp | -1.9% | 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.