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

Materials29.2%+26.88 ppEnergy2.3%-0.54 ppCommunication Services2.2%-0.64 ppUtilities2.1%-0.78 ppReal Estate1.6%-0.97 ppIndustrials7.6%-2.18 ppConsumer Staples4.9%-2.47 ppConsumer Discretionary8.4%-3.06 ppFinancials7.9%-4.65 ppHealth Care8.0%-4.97 ppInformation Technology25.9%-6.63 pp

2 · Industry

Inside Real Estate

Telecom Tower REITs0.20%-0.21 ppMulti-Family Residential REITs0.11%-0.12 ppRetail REITs0.22%-0.10 ppSelf-Storage REITs0.11%-0.09 ppReal Estate Services0.08%-0.09 ppData Center REITs0.23%-0.07 ppIndustrial REITs0.18%-0.07 ppHealth Care REITs0.27%-0.06 ppHotel & Resort REITs0.06%-0.04 ppOffice REITs0.02%-0.04 ppSingle-Family Residential REITs0.02%-0.03 ppTimber REITs0.03%-0.02 ppOther Specialized REITs0.04%-0.02 pp

3 · Sub-industry

Inside Other Specialized REITs

Other Specialized REITs0.04%-0.016 pp
Concentrated

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

View all contributions →
Other Specialized REITs · weight
0.04%
Industry change · 12M
-0.02 pp
Other Specialized REITs · contribution
-0.016 pp
Company participation
0%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Iron Mountain →
IRM
United States$30.2bn0.044%-0.004 pp-0.016 pp+22.9%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.