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
Latest available · not live
20182026
Universe›Real Estate›Office REITs›Office REITs

1 · Sector

Weight and 12M allocation change

Information Technology43.1%+4.93 ppEnergy3.8%+1.55 ppHealth Care10.6%+0.26 ppMaterials1.9%-0.22 ppCommunication Services2.1%-0.27 ppReal Estate1.8%-0.35 ppIndustrials9.1%-0.58 ppUtilities2.1%-0.61 ppConsumer Staples5.4%-0.78 ppConsumer Discretionary10.3%-1.78 ppFinancials9.7%-2.16 pp

2 · Industry

Inside Real Estate

Telecom Tower REITs0.20%-0.10 ppReal Estate Services0.08%-0.08 ppRetail REITs0.24%-0.05 ppHealth Care REITs0.37%+0.04 ppMulti-Family Residential REITs0.13%-0.04 ppSelf-Storage REITs0.13%-0.03 ppHotel & Resort REITs0.07%-0.02 ppOffice REITs0.03%-0.02 ppTimber REITs0.02%-0.01 ppSingle-Family Residential REITs0.03%-0.01 ppIndustrial REITs0.20%-0.01 ppOther Specialized REITs0.06%-0.00 ppData Center REITs0.27%-0.00 pp

3 · Sub-industry

Inside Office REITs

Office REITs0.03%-0.022 pp
Concentrated

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

View all contributions →
Office REITs · weight
0.03%
Industry change · 12M
-0.02 pp
Office REITs · contribution
-0.022 pp
Company participation
0%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Alexandria Real Estate Equities →
ARE
United States$8.3bn0.014%-0.002 pp-0.015 pp-39.6%No
BXP, Inc. →
BXP
United States$9.8bn0.016%-0.002 pp-0.007 pp-14.0%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.