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
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Real Estate
Industrial REITs0.21%-0.04 ppTelecom Tower REITs0.31%-0.03 ppHealth Care REITs0.19%+0.03 ppMulti-Family Residential REITs0.15%-0.03 ppData Center REITs0.22%-0.03 ppHotel & Resort REITs0.08%-0.02 ppOther Specialized REITs0.05%+0.01 ppOffice REITs0.06%-0.01 ppTimber REITs0.04%-0.01 ppReal Estate Services0.12%-0.01 ppSingle-Family Residential REITs0.04%-0.01 ppSelf-Storage REITs0.15%+0.00 ppRetail REITs0.23%-0.00 pp
3 · Sub-industry
Inside Telecom Tower REITs
Telecom Tower REITs · weight
0.31%
Industry change · 12M
-0.03 pp
Telecom Tower REITs · contribution
-0.035 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jul 2024 · sorted by absolute contribution to 12-month change
| Company | Country | Market cap | Universe weight | 3M contribution | 12M contribution | 12M price return | Above 6M weight average |
|---|---|---|---|---|---|---|---|
| Crown Castle → CCI | United States | $47.8bn | 0.086% | -0.032 pp | -0.017 pp | +7.9% | No |
| SBA Communications → SBAC | United States | $23.6bn | 0.042% | -0.016 pp | -0.009 pp | +2.0% | No |
| American Tower → AMT | United States | $102.9bn | 0.185% | -0.048 pp | -0.009 pp | +20.0% | 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.