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
Health Care Equipment3.04%-0.28 ppBiotechnology2.64%+0.26 ppPharmaceuticals5.02%+0.22 ppLife Sciences Tools & Services1.94%-0.10 ppHealth Care Services0.83%-0.08 ppHealth Care Supplies0.18%-0.08 ppHealth Care Distributors0.38%+0.04 ppHealth Care Facilities0.24%-0.03 ppManaged Health Care2.30%+0.01 ppHealth Care Technology0.00%+0.00 pp
3 · Sub-industry
Inside Health Care Services
Health Care Services · weight
0.83%
Industry change · 12M
-0.08 pp
Health Care Services · contribution
-0.078 pp
Company participation
40%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 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 | $107.3bn | 0.377% | -0.077 pp | -0.095 pp | -17.5% | No |
| Cigna → CI | United States | $86.8bn | 0.305% | -0.036 pp | +0.040 pp | +24.9% | No |
| DaVita → DVA | United States | $7.4bn | 0.026% | +0.004 pp | -0.012 pp | -27.1% | Yes |
| Labcorp → LH | United States | $18.2bn | 0.064% | +0.002 pp | -0.012 pp | -10.7% | Yes |
| Quest Diagnostics → DGX | United States | $15.4bn | 0.054% | -0.005 pp | -0.000 pp | +7.5% | 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.