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 REITs0.20%-0.23 ppMulti-Family Residential REITs0.11%-0.11 ppRetail REITs0.21%-0.10 ppData Center REITs0.24%-0.09 ppSelf-Storage REITs0.11%-0.09 ppReal Estate Services0.08%-0.08 ppHealth Care REITs0.28%-0.06 ppIndustrial REITs0.18%-0.05 ppHotel & Resort REITs0.06%-0.04 ppOffice REITs0.02%-0.03 ppSingle-Family Residential REITs0.02%-0.03 ppTimber REITs0.02%-0.02 ppOther Specialized REITs0.05%-0.01 pp
3 · Sub-industry
Inside Health Care REITs
Health Care REITs · weight
0.28%
Industry change · 12M
-0.06 pp
Health Care REITs · contribution
-0.062 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 2026 · 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 |
|---|---|---|---|---|---|---|---|
| Welltower → WELL | United States | $153.4bn | 0.208% | -0.039 pp | -0.031 pp | +44.8% | No |
| Ventas → VTR | United States | $42.7bn | 0.058% | -0.012 pp | -0.016 pp | +28.8% | No |
| Healthpeak Properties → DOC | United States | $11.2bn | 0.015% | -0.008 pp | -0.015 pp | -2.8% | 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.