Universe›Energy›Oil & Gas Storage & Transportation›Oil & Gas Storage & Transportation›Williams Companies
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Williams Companies
WMB · United States · Oil & Gas Storage & Transportation · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.125%
12M weight contribution
-0.033 pp
3M weight contribution
-0.021 pp
12M price return
+32.9%
Share of matched S&P 500 members
Monthly observations through Feb 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 |
|---|---|---|---|---|---|
| Feb 2026 | $91.3bn | 0.125% | -0.033 pp | +32.9% | No |
| Jan 2026 | $82.1bn | 0.157% | +0.007 pp | +25.5% | Yes |
| Dec 2025 | $73.4bn | 0.144% | -0.006 pp | +14.9% | No |
| Nov 2025 | $74.4bn | 0.146% | -0.011 pp | +7.8% | No |
| Oct 2025 | $70.7bn | 0.138% | -0.012 pp | +14.4% | No |
| Sep 2025 | $77.4bn | 0.155% | +0.025 pp | +43.6% | No |
| Aug 2025 | $70.7bn | 0.147% | +0.012 pp | +31.2% | No |
| Jul 2025 | $73.2bn | 0.154% | +0.061 pp | +44.8% | No |
| Jun 2025 | $76.7bn | 0.165% | +0.068 pp | +53.3% | Yes |
| May 2025 | $73.9bn | 0.167% | +0.071 pp | +51.7% | Yes |
| Apr 2025 | $71.4bn | 0.171% | +0.036 pp | +58.9% | Yes |
| Mar 2025 | $72.9bn | 0.173% | +0.042 pp | +59.6% | Yes |
| Feb 2025 | $70.9bn | 0.159% | +0.033 pp | +69.1% | Yes |
| Jan 2025 | $67.6bn | 0.150% | +0.025 pp | +67.1% | Yes |
| Dec 2024 | $66.0bn | 0.150% | +0.023 pp | +62.3% | Yes |
| Nov 2024 | $71.3bn | 0.157% | +0.018 pp | +66.9% | Yes |
| Oct 2024 | $63.8bn | 0.150% | +0.008 pp | +59.7% | Yes |
| Sep 2024 | $55.6bn | 0.130% | -0.007 pp | +42.1% | Yes |
| Aug 2024 | $55.8bn | 0.135% | +0.001 pp | +39.4% | Yes |
| Jul 2024 | $52.3bn | 0.094% | +0.002 pp | +31.1% | No |
| Jun 2024 | $51.8bn | 0.097% | +0.005 pp | +37.0% | No |
| May 2024 | $50.6bn | 0.097% | +0.010 pp | +52.7% | No |
| Apr 2024 | $46.7bn | 0.135% | +0.011 pp | +33.7% | Yes |
| Mar 2024 | $47.4bn | 0.132% | +0.007 pp | +37.6% | 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.