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
Paper & Plastic Packaging Products & Materials0.33%-0.10 ppFertilizers & Agricultural Chemicals0.18%-0.06 ppConstruction Materials0.21%+0.05 ppIndustrial Gases0.77%-0.04 ppSpecialty Chemicals0.72%-0.02 ppCommodity Chemicals0.11%-0.02 ppGold0.11%-0.02 ppCopper0.19%-0.01 ppSteel0.20%-0.00 ppMetal, Glass & Plastic Containers0.06%-0.00 pp
3 · Sub-industry
Inside Industrial Gases
Industrial Gases · weight
0.77%
Industry change · 12M
-0.04 pp
Industrial Gases · contribution
-0.045 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2024 · 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 |
|---|---|---|---|---|---|---|---|
| Air Products → APD | United States | $53.9bn | 0.149% | -0.032 pp | -0.068 pp | -13.4% | No |
| Linde plc → LIN | United States | $223.6bn | 0.620% | +0.026 pp | +0.023 pp | +32.3% | 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.