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

Materials27.4%+25.10 ppEnergy2.1%-0.32 ppCommunication Services2.0%-0.81 ppUtilities2.0%-0.92 ppReal Estate1.6%-0.95 ppIndustrials7.6%-2.27 ppConsumer Discretionary8.9%-2.59 ppConsumer Staples4.7%-2.85 ppFinancials7.8%-4.44 ppInformation Technology28.4%-4.69 ppHealth Care7.4%-5.25 pp

2 · Industry

Inside Real Estate

Telecom Tower REITs0.20%-0.23 ppMulti-Family Residential REITs0.11%-0.11 ppRetail REITs0.21%-0.10 ppData Center REITs0.24%-0.09 ppSelf-Storage REITs0.11%-0.09 ppReal Estate Services0.08%-0.08 ppHealth Care REITs0.28%-0.06 ppIndustrial REITs0.18%-0.05 ppHotel & Resort REITs0.06%-0.04 ppOffice REITs0.02%-0.03 ppSingle-Family Residential REITs0.02%-0.03 ppTimber REITs0.02%-0.02 ppOther Specialized REITs0.05%-0.01 pp

3 · Sub-industry

Inside Other Specialized REITs

Other Specialized REITs0.05%-0.012 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
-0.012 pp
Company participation
100%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Iron Mountain →
IRM
United States$37.5bn0.051%-0.001 pp-0.012 pp+45.4%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.