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
Telecom Tower REITs0.72%+0.34 ppRetail REITs0.39%+0.23 ppIndustrial REITs0.37%+0.23 ppSelf-Storage REITs0.30%+0.19 ppMulti-Family Residential REITs0.33%+0.19 ppData Center REITs0.36%+0.17 ppHealth Care REITs0.26%+0.13 ppOffice REITs0.17%+0.10 ppReal Estate Services0.11%+0.06 ppTimber REITs0.10%+0.05 ppOther Specialized REITs0.05%+0.03 ppHotel & Resort REITs0.05%+0.02 ppSingle-Family Residential REITs0.00%+0.00 pp
3 · Sub-industry
Inside Telecom Tower REITs
Telecom Tower REITs · weight
0.72%
Industry change · 12M
+0.34 pp
Telecom Tower REITs · contribution
+0.341 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 2022 · 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 |
|---|---|---|---|---|---|---|---|
| American Tower → AMT | United States | $103.4bn | 0.359% | -0.045 pp | +0.167 pp | +7.0% | No |
| Crown Castle → CCI | United States | $72.0bn | 0.250% | -0.015 pp | +0.116 pp | +10.2% | No |
| SBA Communications → SBAC | United States | $33.0bn | 0.114% | -0.012 pp | +0.059 pp | +19.8% | 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.