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
Pharmaceuticals5.24%+1.87 ppHealth Care Equipment3.42%+1.56 ppLife Sciences Tools & Services1.79%+0.84 ppBiotechnology2.32%+0.57 ppHealth Care Services0.94%+0.55 ppManaged Health Care1.70%+0.46 ppHealth Care Distributors0.35%+0.12 ppHealth Care Facilities0.22%+0.06 ppHealth Care Supplies0.10%-0.01 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.94%
Industry change · 12M
+0.55 pp
Health Care Services · contribution
+0.551 pp
Company participation
40%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 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 | $57.3bn | 0.304% | -0.018 pp | +0.304 pp | -27.1% | No |
| CVS Health → CVS | United States | $82.0bn | 0.436% | +0.054 pp | +0.180 pp | -17.2% | Yes |
| Quest Diagnostics → DGX | United States | $14.4bn | 0.077% | +0.003 pp | +0.030 pp | +1.4% | Yes |
| Labcorp → LH | United States | $14.1bn | 0.075% | -0.004 pp | +0.026 pp | -3.3% | No |
| DaVita → DVA | United States | $9.1bn | 0.049% | -0.002 pp | +0.011 pp | -20.3% | 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.