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 Chemicals0.90%+0.90 ppIndustrial Gases0.73%+0.73 ppPaper & Plastic Packaging Products & Materials0.49%+0.49 ppFertilizers & Agricultural Chemicals0.20%+0.20 ppCopper0.17%+0.17 ppConstruction Materials0.15%+0.15 ppGold0.15%+0.15 ppCommodity Chemicals0.15%+0.15 ppMetal, Glass & Plastic Containers0.10%+0.10 ppSteel0.10%+0.10 pp
3 · Sub-industry
Inside Specialty Chemicals
Specialty Chemicals · weight
0.90%
Industry change · 12M
+0.90 pp
Specialty Chemicals · contribution
+0.904 pp
Company participation
17%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 2021 · 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 |
|---|---|---|---|---|---|---|---|
| Sherwin-Williams → SHW | United States | $73.7bn | 0.259% | +0.003 pp | +0.258 pp | +21.4% | No |
| Ecolab → ECL | United States | $59.7bn | 0.210% | +0.002 pp | +0.209 pp | +5.3% | No |
| PPG Industries → PPG | United States | $33.9bn | 0.119% | -0.023 pp | +0.119 pp | +18.9% | No |
| International Flavors & Fragrances → IFF | United States | $33.3bn | 0.117% | -0.014 pp | +0.117 pp | +11.8% | No |
| LyondellBasell → LYB | United States | $31.4bn | 0.110% | -0.011 pp | +0.110 pp | +38.9% | No |
| Albemarle Corporation → ALB | United States | $25.6bn | 0.090% | +0.020 pp | +0.090 pp | +147.5% | 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.