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 Materials
Specialty Chemicals0.55%-0.14 ppIndustrial Gases0.66%-0.11 ppCopper0.12%-0.08 ppSteel0.11%-0.06 ppCommodity Chemicals0.05%-0.06 ppConstruction Materials0.16%-0.04 ppMetal, Glass & Plastic Containers0.04%-0.03 ppFertilizers & Agricultural Chemicals0.16%-0.03 ppPaper & Plastic Packaging Products & Materials0.34%+0.02 ppGold0.14%+0.01 pp
3 · Sub-industry
Inside Specialty Chemicals
Specialty Chemicals · weight
0.55%
Industry change · 12M
-0.14 pp
Specialty Chemicals · contribution
-0.140 pp
Company participation
33%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 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 |
|---|---|---|---|---|---|---|---|
| LyondellBasell → LYB | United States | $18.7bn | 0.045% | -0.010 pp | -0.049 pp | -38.1% | No |
| PPG Industries → PPG | United States | $24.7bn | 0.059% | -0.000 pp | -0.028 pp | -13.8% | No |
| Albemarle Corporation → ALB | United States | $6.9bn | 0.017% | -0.005 pp | -0.024 pp | -50.5% | No |
| Ecolab → ECL | United States | $71.2bn | 0.171% | +0.013 pp | -0.016 pp | +12.3% | Yes |
| International Flavors & Fragrances → IFF | United States | $20.1bn | 0.048% | -0.001 pp | -0.014 pp | -5.7% | No |
| Sherwin-Williams → SHW | United States | $88.4bn | 0.212% | +0.012 pp | -0.008 pp | +18.8% | 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.