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
Pharmaceuticals5.34%+1.80 ppHealth Care Equipment3.37%+1.57 ppBiotechnology2.48%+0.86 ppLife Sciences Tools & Services1.74%+0.81 ppManaged Health Care1.93%+0.64 ppHealth Care Services0.99%+0.61 ppHealth Care Distributors0.34%+0.11 ppHealth Care Facilities0.24%+0.08 ppHealth Care Supplies0.12%+0.05 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.99%
Industry change · 12M
+0.61 pp
Health Care Services · contribution
+0.611 pp
Company participation
60%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Oct 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 | $66.6bn | 0.347% | +0.004 pp | +0.347 pp | -16.5% | Yes |
| CVS Health → CVS | United States | $86.3bn | 0.450% | +0.064 pp | +0.200 pp | -5.2% | Yes |
| Quest Diagnostics → DGX | United States | $13.6bn | 0.071% | -0.002 pp | +0.028 pp | +10.0% | No |
| Labcorp → LH | United States | $13.7bn | 0.072% | -0.004 pp | +0.024 pp | +2.6% | No |
| DaVita → DVA | United States | $9.4bn | 0.049% | -0.004 pp | +0.011 pp | -13.0% | 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.