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
Universe›Materials›Paper & Plastic Packaging Products & Materials›Paper & Plastic Packaging Products & Materials
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Materials
Paper & Plastic Packaging Products & Materials27.67%+27.31 ppIndustrial Gases0.43%-0.25 ppSpecialty Chemicals0.36%-0.20 ppConstruction Materials0.21%+0.06 ppGold0.17%+0.04 ppFertilizers & Agricultural Chemicals0.12%-0.03 ppSteel0.09%-0.02 ppCommodity Chemicals0.04%-0.01 ppMetal, Glass & Plastic Containers0.02%-0.01 ppCopper0.12%-0.01 pp
3 · Sub-industry
Inside Paper & Plastic Packaging Products & Materials
Paper & Plastic Packaging Products & Materials · weight
27.67%
Industry change · 12M
+27.31 pp
Paper & Plastic Packaging Products & Materials · contribution
+27.310 pp
Company participation
20%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2026 · 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 |
|---|---|---|---|---|---|---|---|
| Packaging Corporation of America → PKG | United States | $18932.9bn | 27.571% | +27.535 pp | +27.529 pp | +9.8% | Yes |
| Amcor → AMCR | United States | $18.4bn | 0.027% | -0.162 pp | -0.140 pp | -13.2% | No |
| International Paper → IP | United States | $18.9bn | 0.028% | -0.013 pp | -0.039 pp | -30.2% | No |
| Smurfit Westrock → SW | United States | $20.9bn | 0.030% | -0.009 pp | -0.025 pp | -9.1% | No |
| Avery Dennison → AVY | United States | $13.3bn | 0.019% | -0.008 pp | -0.014 pp | -0.9% | 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.