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
Paper & Plastic Packaging Products & Materials0.60%+0.48 ppIndustrial Gases0.80%+0.38 ppSpecialty Chemicals0.74%+0.28 ppCommodity Chemicals0.17%+0.17 ppGold0.18%+0.12 ppFertilizers & Agricultural Chemicals0.19%+0.11 ppConstruction Materials0.17%+0.09 ppMetal, Glass & Plastic Containers0.12%+0.06 ppCopper0.08%+0.02 ppSteel0.07%+0.01 pp
3 · Sub-industry
Inside Industrial Gases
Industrial Gases · weight
0.80%
Industry change · 12M
+0.38 pp
Industrial Gases · contribution
+0.383 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 2020 · 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 | $109.1bn | 0.538% | -0.021 pp | +0.242 pp | +27.0% | No |
| Air Products → APD | United States | $52.7bn | 0.260% | +0.015 pp | +0.141 pp | +48.4% | 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.