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 Chemicals0.40%+0.40 ppIndustrial Gases0.37%+0.37 ppPaper & Plastic Packaging Products & Materials0.26%+0.26 ppFertilizers & Agricultural Chemicals0.11%+0.11 ppCopper0.10%+0.10 ppCommodity Chemicals0.09%+0.09 ppGold0.09%+0.09 ppConstruction Materials0.09%+0.09 ppMetal, Glass & Plastic Containers0.06%+0.06 ppSteel0.04%+0.04 pp
3 · Sub-industry
Inside Industrial Gases
Industrial Gases · weight
0.37%
Industry change · 12M
+0.37 pp
Industrial Gases · contribution
+0.369 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 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 |
|---|---|---|---|---|---|---|---|
| Linde plc → LIN | United States | $128.2bn | 0.256% | -0.315 pp | +0.256 pp | +30.1% | No |
| Air Products → APD | United States | $56.6bn | 0.113% | -0.150 pp | +0.113 pp | +18.9% | No |
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.