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 Chemicals0.56%-0.16 ppIndustrial Gases0.68%-0.09 ppSteel0.11%-0.09 ppConstruction Materials0.14%-0.06 ppCopper0.13%-0.06 ppCommodity Chemicals0.06%-0.05 ppPaper & Plastic Packaging Products & Materials0.36%+0.04 ppFertilizers & Agricultural Chemicals0.15%-0.03 ppMetal, Glass & Plastic Containers0.03%-0.02 ppGold0.13%+0.01 pp
3 · Sub-industry
Inside Metal, Glass & Plastic Containers
Metal, Glass & Plastic Containers · weight
0.03%
Industry change · 12M
-0.02 pp
Metal, Glass & Plastic Containers · contribution
-0.024 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2025 · 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 | $14.7bn | 0.035% | -0.002 pp | -0.024 pp | -21.7% | 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.