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 Technology36.6%+3.08 ppIndustrials10.0%+0.39 ppCommunication Services2.7%+0.26 ppMaterials2.4%+0.12 ppEnergy2.5%+0.04 ppUtilities2.6%-0.06 ppReal Estate2.1%-0.26 ppConsumer Staples6.3%-0.46 ppConsumer Discretionary12.3%-0.81 ppFinancials11.4%-1.15 ppHealth Care11.0%-1.15 pp

2 · Industry

Inside Real Estate

Health Care REITs0.34%+0.06 ppTelecom Tower REITs0.27%-0.06 ppData Center REITs0.26%-0.05 ppMulti-Family Residential REITs0.15%-0.05 ppSelf-Storage REITs0.15%-0.04 ppOffice REITs0.04%-0.03 ppReal Estate Services0.15%-0.02 ppRetail REITs0.28%-0.02 ppOther Specialized REITs0.05%-0.01 ppHotel & Resort REITs0.08%-0.01 ppTimber REITs0.04%-0.01 ppIndustrial REITs0.23%-0.01 ppSingle-Family Residential REITs0.03%-0.01 pp

3 · Sub-industry

Inside Other Specialized REITs

Other Specialized REITs0.05%-0.014 pp
Concentrated

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

View all contributions →
Other Specialized REITs · weight
0.05%
Industry change · 12M
-0.01 pp
Other Specialized REITs · contribution
-0.014 pp
Company participation
0%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Jan 2026 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Iron Mountain →
IRM
United States$27.2bn0.052%-0.007 pp-0.014 pp-6.0%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.