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 Technology29.3%+5.56 ppConsumer Discretionary12.4%+2.29 ppIndustrials10.4%-0.00 ppReal Estate2.9%-0.24 ppMaterials2.8%-0.35 ppCommunication Services2.8%-0.37 ppEnergy3.2%-0.82 ppUtilities2.8%-0.82 ppFinancials11.5%-0.88 ppConsumer Staples6.6%-1.31 ppHealth Care15.2%-3.03 pp

2 · Industry

Inside Real Estate

Telecom Tower REITs0.53%-0.15 ppMulti-Family Residential REITs0.23%-0.05 ppRetail REITs0.35%-0.03 ppOffice REITs0.10%-0.03 ppData Center REITs0.35%+0.02 ppHotel & Resort REITs0.14%-0.01 ppSelf-Storage REITs0.26%+0.01 ppHealth Care REITs0.24%+0.01 ppReal Estate Services0.19%-0.01 ppOther Specialized REITs0.06%+0.01 ppIndustrial REITs0.37%-0.01 ppTimber REITs0.08%-0.01 ppSingle-Family Residential REITs0.06%-0.00 pp

3 · Sub-industry

Inside Other Specialized REITs

Other Specialized REITs0.06%+0.009 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
+0.01 pp
Other Specialized REITs · contribution
+0.009 pp
Company participation
100%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Dec 2023 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Iron Mountain →
IRM
United States$20.4bn0.061%+0.003 pp+0.009 pp+46.5%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.