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
Pharmaceuticals6.10%+0.50 ppBiotechnology2.70%-0.49 ppHealth Care Equipment3.38%+0.45 ppLife Sciences Tools & Services1.87%+0.34 ppHealth Care Services0.95%+0.32 ppManaged Health Care2.12%+0.22 ppHealth Care Distributors0.36%-0.11 ppHealth Care Facilities0.26%+0.05 ppHealth Care Supplies0.15%+0.01 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.95%
Industry change · 12M
+0.32 pp
Health Care Services · contribution
+0.317 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2019 · 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 |
|---|---|---|---|---|---|---|---|
| Cigna → CI | United States | $61.1bn | 0.351% | +0.351 pp | +0.351 pp | -4.1% | Yes |
| DaVita → DVA | United States | $9.0bn | 0.052% | +0.021 pp | -0.022 pp | -17.7% | Yes |
| CVS Health → CVS | United States | $70.0bn | 0.402% | +0.163 pp | +0.015 pp | -10.7% | Yes |
| Quest Diagnostics → DGX | United States | $12.1bn | 0.069% | +0.029 pp | -0.014 pp | -8.5% | Yes |
| Labcorp → LH | United States | $13.0bn | 0.074% | +0.035 pp | -0.012 pp | -5.4% | 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.