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›Construction Materials›Construction Materials

1 · Sector

Weight and 12M allocation change

Information Technology29.7%+5.20 ppConsumer Discretionary11.9%+0.62 ppIndustrials10.2%+0.09 ppCommunication Services2.9%-0.50 ppReal Estate2.8%-0.52 ppMaterials2.7%-0.53 ppUtilities2.7%-0.66 ppConsumer Staples6.7%-0.73 ppEnergy3.1%-0.73 ppFinancials11.7%-0.96 ppHealth Care15.6%-1.28 pp

2 · Industry

Inside Materials

Paper & Plastic Packaging Products & Materials0.33%-0.12 ppFertilizers & Agricultural Chemicals0.17%-0.10 ppSpecialty Chemicals0.69%-0.09 ppGold0.08%-0.06 ppIndustrial Gases0.75%-0.05 ppCopper0.17%-0.05 ppCommodity Chemicals0.11%-0.03 ppSteel0.19%-0.03 ppConstruction Materials0.18%+0.02 ppMetal, Glass & Plastic Containers0.05%-0.01 pp

3 · Sub-industry

Inside Construction Materials

Construction Materials0.18%+0.023 pp
Concentrated

Most of this industry's gains came from a few companies.

View all contributions →
Construction Materials · weight
0.18%
Industry change · 12M
+0.02 pp
Construction Materials · contribution
+0.023 pp
Company participation
50%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Jan 2024 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Martin Marietta Materials →
MLM
United States$31.4bn0.093%+0.008 pp+0.017 pp+42.3%Yes
Vulcan Materials Company →
VMC
United States$30.0bn0.089%+0.001 pp+0.006 pp+24.3%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.