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
Industrial Gases0.82%+0.61 ppCommodity Chemicals0.19%+0.19 ppPaper & Plastic Packaging Products & Materials0.19%-0.05 ppCopper0.09%-0.05 ppMetal, Glass & Plastic Containers0.13%+0.05 ppGold0.16%+0.05 ppSteel0.09%-0.04 ppConstruction Materials0.18%+0.02 ppSpecialty Chemicals0.83%-0.02 ppFertilizers & Agricultural Chemicals0.11%-0.02 pp
3 · Sub-industry
Inside Metal, Glass & Plastic Containers
Metal, Glass & Plastic Containers · weight
0.13%
Industry change · 12M
+0.05 pp
Metal, Glass & Plastic Containers · contribution
+0.048 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jul 2019 · 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 |
|---|---|---|---|---|---|---|---|
| Ball Corporation → BALL | United States | $23.9bn | 0.127% | +0.016 pp | +0.048 pp | +85.0% | 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.