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 Health Care
Managed Health Care2.23%-0.48 ppPharmaceuticals5.26%-0.36 ppLife Sciences Tools & Services1.70%-0.33 ppHealth Care Services0.72%-0.26 ppBiotechnology2.53%-0.12 ppHealth Care Supplies0.18%+0.04 ppHealth Care Equipment2.91%-0.03 ppHealth Care Facilities0.22%+0.02 ppHealth Care Distributors0.42%+0.01 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.72%
Industry change · 12M
-0.26 pp
Health Care Services · contribution
-0.257 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 2023 · 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 |
|---|---|---|---|---|---|---|---|
| CVS Health → CVS | United States | $89.7bn | 0.299% | +0.095 pp | -0.193 pp | -24.6% | Yes |
| Cigna → CI | United States | $84.7bn | 0.283% | +0.091 pp | -0.050 pp | +4.9% | Yes |
| Quest Diagnostics → DGX | United States | $13.7bn | 0.046% | +0.009 pp | -0.011 pp | +1.3% | Yes |
| Labcorp → LH | United States | $17.8bn | 0.059% | +0.017 pp | -0.003 pp | +15.7% | Yes |
| DaVita → DVA | United States | $8.6bn | 0.029% | +0.008 pp | -0.001 pp | +14.2% | 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.