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 REITs0.29%-0.08 ppTelecom Tower REITs0.43%-0.06 ppData Center REITs0.31%-0.05 ppHealth Care REITs0.28%+0.05 ppMulti-Family Residential REITs0.23%-0.03 ppReal Estate Services0.16%-0.03 ppTimber REITs0.05%-0.02 ppOther Specialized REITs0.08%+0.02 ppHotel & Resort REITs0.11%-0.02 ppOffice REITs0.08%-0.02 ppRetail REITs0.34%+0.01 ppSingle-Family Residential REITs0.05%-0.01 ppSelf-Storage REITs0.24%-0.01 pp
3 · Sub-industry
Inside Telecom Tower REITs
Telecom Tower REITs · weight
0.43%
Industry change · 12M
-0.06 pp
Telecom Tower REITs · contribution
-0.056 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 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 | $48.7bn | 0.118% | +0.032 pp | -0.021 pp | +18.3% | Yes |
| SBA Communications → SBAC | United States | $24.4bn | 0.059% | +0.018 pp | -0.019 pp | +2.7% | Yes |
| American Tower → AMT | United States | $104.7bn | 0.253% | +0.078 pp | -0.016 pp | +28.0% | 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.