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 Metal, Glass & Plastic Containers
Metal, Glass & Plastic Containers · weight
0.10%
Industry change · 12M
+0.10 pp
Metal, Glass & Plastic Containers · contribution
+0.103 pp
Company participation
100%
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 |
|---|---|---|---|---|---|---|---|
| Ball Corporation → BALL | United States | $29.4bn | 0.103% | +0.009 pp | +0.103 pp | +9.0% | 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.