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
Life Sciences Tools & Services2.30%+0.26 ppPharmaceuticals4.65%-0.21 ppHealth Care Equipment3.22%-0.14 ppHealth Care Services0.79%-0.11 ppHealth Care Distributors0.27%-0.05 ppBiotechnology2.37%+0.02 ppHealth Care Supplies0.29%+0.02 ppHealth Care Facilities0.24%+0.02 ppManaged Health Care2.07%+0.01 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.79%
Industry change · 12M
-0.11 pp
Health Care Services · contribution
-0.106 pp
Company participation
40%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 2021 · 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 | $63.6bn | 0.215% | -0.026 pp | -0.106 pp | -7.1% | No |
| CVS Health → CVS | United States | $117.6bn | 0.397% | +0.016 pp | +0.020 pp | +34.7% | Yes |
| DaVita → DVA | United States | $9.6bn | 0.033% | -0.013 pp | -0.020 pp | -14.0% | No |
| Quest Diagnostics → DGX | United States | $18.2bn | 0.062% | -0.001 pp | -0.009 pp | +22.1% | Yes |
| Labcorp → LH | United States | $23.5bn | 0.079% | -0.005 pp | +0.008 pp | +42.8% | 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.