Observatory · observe first
Southwest Airlines
LUV · United States · Passenger Airlines · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.036%
12M weight contribution
-0.007 pp
3M weight contribution
+0.003 pp
12M price return
+31.3%
Share of matched S&P 500 members
Monthly observations through May 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 |
|---|---|---|---|---|---|
| May 2026 | $21.0bn | 0.036% | -0.007 pp | +31.3% | Yes |
| Apr 2026 | $18.5bn | 0.025% | -0.013 pp | +38.4% | No |
| Mar 2026 | $18.5bn | 0.027% | -0.020 pp | +14.1% | No |
| Feb 2026 | $24.2bn | 0.033% | -0.008 pp | +62.1% | No |
| Jan 2026 | $24.6bn | 0.047% | +0.006 pp | +58.1% | Yes |
| Dec 2025 | $21.4bn | 0.042% | -0.004 pp | +25.6% | Yes |
| Nov 2025 | $18.0bn | 0.035% | -0.007 pp | +10.0% | Yes |
| Oct 2025 | $15.7bn | 0.031% | -0.012 pp | +1.3% | No |
| Sep 2025 | $16.8bn | 0.034% | -0.008 pp | +10.1% | No |
| Aug 2025 | $17.3bn | 0.036% | -0.006 pp | +16.4% | No |
| Jul 2025 | $16.2bn | 0.034% | +0.005 pp | +17.5% | No |
| Jun 2025 | $18.5bn | 0.040% | +0.008 pp | +16.0% | No |
| May 2025 | $19.0bn | 0.043% | +0.012 pp | +27.3% | Yes |
| Apr 2025 | $15.9bn | 0.038% | -0.007 pp | +10.4% | No |
| Mar 2025 | $19.9bn | 0.047% | -0.001 pp | +17.8% | Yes |
| Feb 2025 | $18.4bn | 0.041% | -0.017 pp | -7.3% | No |
| Jan 2025 | $18.4bn | 0.041% | -0.012 pp | +5.1% | No |
| Dec 2024 | $20.2bn | 0.046% | -0.006 pp | +19.1% | Yes |
| Nov 2024 | $19.4bn | 0.043% | -0.005 pp | +29.6% | Yes |
| Oct 2024 | $18.3bn | 0.043% | -0.002 pp | +40.9% | Yes |
| Sep 2024 | $17.8bn | 0.041% | -0.013 pp | +12.1% | Yes |
| Aug 2024 | $17.3bn | 0.042% | -0.018 pp | -6.3% | Yes |
| Jul 2024 | $16.1bn | 0.029% | -0.015 pp | -19.3% | No |
| Jun 2024 | $17.1bn | 0.032% | -0.018 pp | -19.1% | 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.