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 & Materials25.93%+25.58 ppIndustrial Gases0.41%-0.25 ppSpecialty Chemicals0.33%-0.22 ppConstruction Materials0.21%+0.05 ppFertilizers & Agricultural Chemicals0.11%-0.05 ppGold0.16%+0.02 ppMetal, Glass & Plastic Containers0.02%-0.01 ppCommodity Chemicals0.04%-0.01 ppCopper0.11%-0.01 ppSteel0.11%+0.00 pp
3 · Sub-industry
Inside Paper & Plastic Packaging Products & Materials
Paper & Plastic Packaging Products & Materials · weight
25.93%
Industry change · 12M
+25.58 pp
Paper & Plastic Packaging Products & Materials · contribution
+25.584 pp
Company participation
20%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 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 | $19042.6bn | 25.836% | +25.797 pp | +25.796 pp | +17.8% | Yes |
| Amcor → AMCR | United States | $17.6bn | 0.024% | -0.172 pp | -0.136 pp | -12.4% | No |
| International Paper → IP | United States | $16.1bn | 0.022% | -0.019 pp | -0.036 pp | -30.6% | No |
| Smurfit Westrock → SW | United States | $20.1bn | 0.027% | -0.014 pp | -0.025 pp | -6.0% | No |
| Avery Dennison → AVY | United States | $12.6bn | 0.017% | -0.010 pp | -0.015 pp | -2.1% | 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.