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
Pharmaceuticals4.70%-1.12 ppManaged Health Care2.07%-0.56 ppBiotechnology2.40%-0.49 ppLife Sciences Tools & Services1.64%-0.40 ppHealth Care Services0.70%-0.26 ppHealth Care Equipment2.89%-0.16 ppHealth Care Facilities0.22%-0.03 ppHealth Care Supplies0.15%+0.02 ppHealth Care Distributors0.41%-0.02 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.70%
Industry change · 12M
-0.26 pp
Health Care Services · contribution
-0.264 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 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 | $101.6bn | 0.303% | +0.004 pp | -0.139 pp | -12.5% | Yes |
| Cigna → CI | United States | $87.6bn | 0.261% | -0.021 pp | -0.104 pp | -8.0% | Yes |
| Quest Diagnostics → DGX | United States | $15.5bn | 0.046% | +0.001 pp | -0.018 pp | -10.1% | Yes |
| Labcorp → LH | United States | $19.3bn | 0.058% | -0.002 pp | -0.007 pp | +13.8% | Yes |
| DaVita → DVA | United States | $9.6bn | 0.029% | -0.000 pp | +0.004 pp | +40.3% | 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.