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 Technology36.8%+3.53 ppConsumer Discretionary12.0%+1.16 ppFinancials12.2%+0.79 ppCommunication Services2.5%+0.07 ppIndustrials9.8%+0.05 ppUtilities2.7%-0.09 ppEnergy2.4%-0.29 ppMaterials2.3%-0.34 ppReal Estate2.3%-0.39 ppConsumer Staples6.4%-0.84 ppHealth Care10.6%-3.65 pp

2 · Industry

Inside Real Estate

Telecom Tower REITs0.33%-0.10 ppIndustrial REITs0.22%-0.07 ppSelf-Storage REITs0.17%-0.07 ppMulti-Family Residential REITs0.18%-0.05 ppHealth Care REITs0.32%+0.05 ppRetail REITs0.29%-0.04 ppData Center REITs0.28%-0.03 ppOffice REITs0.05%-0.03 ppOther Specialized REITs0.06%-0.02 ppReal Estate Services0.18%+0.02 ppHotel & Resort REITs0.10%-0.02 ppTimber REITs0.04%-0.01 ppSingle-Family Residential REITs0.04%-0.01 pp

3 · Sub-industry

Inside Other Specialized REITs

Other Specialized REITs0.06%-0.024 pp
Concentrated

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

View all contributions →
Other Specialized REITs · weight
0.06%
Industry change · 12M
-0.02 pp
Other Specialized REITs · contribution
-0.024 pp
Company participation
0%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Aug 2025 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Iron Mountain →
IRM
United States$27.3bn0.057%-0.009 pp-0.024 pp-16.0%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.