Observatory · observe first
Follow the allocation change
Matched S&P 500 members → sector → industry → sub-industry → company. Each step uses the same percentage points.
Historical time machine
Historical observation
20182026
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Industrials
Aerospace & Defense2.56%+0.47 ppConstruction Machinery & Heavy Transportation Equipment0.85%+0.14 ppHeavy Electrical Equipment0.36%+0.14 ppConstruction & Engineering0.27%+0.13 ppIndustrial Machinery & Supplies & Components0.92%-0.10 ppHuman Resource & Employment Services0.28%-0.10 ppBuilding Products0.50%-0.07 ppDiversified Support Services0.27%-0.07 ppAir Freight & Logistics0.32%-0.07 ppIndustrial Conglomerates0.52%-0.06 ppElectrical Components & Equipment0.57%-0.06 ppRail Transportation0.53%-0.05 ppResearch & Consulting Services0.11%-0.05 ppPassenger Ground Transportation0.33%+0.04 ppTrading Companies & Distributors0.19%+0.04 ppEnvironmental & Facilities Services0.41%-0.03 ppCargo Ground Transportation0.10%-0.02 ppAgricultural & Farm Machinery0.25%-0.01 ppData Processing & Outsourced Services0.05%-0.01 ppPassenger Airlines0.20%-0.01 pp
3 · Sub-industry
Inside Passenger Airlines
Passenger Airlines · weight
0.20%
Industry change · 12M
-0.01 pp
Passenger Airlines · contribution
-0.005 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 2025 · sorted by absolute contribution to 12-month change
| Company | Country | Market cap | Universe weight | 3M contribution | 12M contribution | 12M price return | Above 6M weight average |
|---|---|---|---|---|---|---|---|
| Southwest Airlines → LUV | United States | $21.4bn | 0.042% | +0.008 pp | -0.004 pp | +25.6% | Yes |
| United Airlines Holdings → UAL | United States | $36.2bn | 0.071% | +0.008 pp | -0.002 pp | +15.2% | Yes |
| Delta Air Lines → DAL | United States | $45.3bn | 0.089% | +0.015 pp | +0.000 pp | +16.1% | Yes |
Company contributions use weights among matched S&P 500 members and add through each level without rescaling. Companies without matched shares and prices are omitted. These observations do not establish official index weights or actual fund flows.