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›Real Estate›Other Specialized REITs›Other Specialized REITs

1 · Sector

Weight and 12M allocation change

Information Technology17.6%+1.59 ppEnergy5.1%+0.44 ppUtilities3.3%+0.18 ppReal Estate3.4%+0.15 ppConsumer Discretionary7.1%+0.03 ppMaterials2.1%-0.02 ppHealth Care16.6%-0.10 ppCommunication Services3.2%-0.30 ppIndustrials15.2%-0.43 ppFinancials18.0%-0.50 ppConsumer Staples8.4%-1.02 pp

2 · Industry

Inside Real Estate

Self-Storage REITs0.30%+0.04 ppMulti-Family Residential REITs0.36%+0.03 ppRetail REITs0.52%+0.02 ppHealth Care REITs0.32%+0.01 ppIndustrial REITs0.21%+0.01 ppTimber REITs0.17%+0.01 ppHotel & Resort REITs0.10%+0.01 ppData Center REITs0.33%-0.01 ppOffice REITs0.19%+0.01 ppReal Estate Services0.10%+0.01 ppOther Specialized REITs0.06%+0.00 ppTelecom Tower REITs0.74%+0.00 ppSingle-Family Residential REITs0.00%+0.00 pp

3 · Sub-industry

Inside Other Specialized REITs

Other Specialized REITs0.06%+0.004 pp
Concentrated

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

View all contributions →
Other Specialized REITs · weight
0.06%
Industry change · 12M
+0.00 pp
Other Specialized REITs · contribution
+0.004 pp
Company participation
100%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

May 2018 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Iron Mountain →
IRM
United States$9.5bn0.058%+0.004 pp+0.004 pp-3.3%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.